#ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */
if (end_shift < 0)
- croak("panic: end_shift");
+ Perl_croak(aTHX_ "panic: end_shift");
#endif
check = prog->check_substr;
register I32 tmp;
I32 minlen; /* must match at least this many chars */
I32 dontbother = 0; /* how many characters not to try at end */
- CURCUR cc;
I32 start_shift = 0; /* Offset of the start to find
constant substr. */ /* CC */
I32 end_shift = 0; /* Same for the end. */ /* CC */
char *scream_olds;
SV* oreplsv = GvSV(PL_replgv);
- cc.cur = 0;
- cc.oldcc = 0;
- PL_regcc = &cc;
+ PL_regcc = 0;
cache_re(prog);
#ifdef DEBUGGING
/* We know what class it must start with. */
switch (OP(c)) {
case ANYOFUTF8:
- cc = (char *) OPERAND(c);
+ cc = MASK(c);
while (s < strend) {
if (REGINCLASSUTF8(c, (U8*)s)) {
if (tmp && regtry(prog, s))
}
break;
case ANYOF:
- cc = (char *) OPERAND(c);
+ cc = MASK(c);
while (s < strend) {
if (REGINCLASS(cc, *s)) {
if (tmp && regtry(prog, s))
s += UTF8SKIP(s);
}
break;
- case ALNUMC:
- while (s < strend) {
- if (isALNUMC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case ALNUMCUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_alnumc, (U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case ALNUMCL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isALNUMC_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case ALNUMCLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isALNUMC_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NALNUMC:
- while (s < strend) {
- if (!isALNUMC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
+ }
+ }
+ 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,
+ end_shift, &scream_pos, 1); /* last one */
+ if (!last)
+ last = scream_olds; /* Only one occurence. */
}
- break;
- case NALNUMCUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_alnumc, (U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
+ else {
+ STRLEN len;
+ char *little = SvPV(prog->float_substr, len);
+
+ if (SvTAIL(prog->float_substr)) {
+ if (memEQ(strend - len + 1, little, len - 1))
+ last = strend - len + 1;
+ else if (!PL_multiline)
+ last = memEQ(strend - len, little, len)
+ ? strend - len : Nullch;
else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NALNUMCL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isALNUMC_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
+ goto find_last;
+ } else {
+ find_last:
+ if (len)
+ last = rninstr(s, strend, little, little + len);
else
- tmp = doevery;
+ last = strend; /* matching `$' */
}
- else
- tmp = 1;
- s++;
}
- break;
- case NALNUMCLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isALNUMC_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
+ if (last == NULL) goto phooey; /* Should not happen! */
+ dontbother = strend - last + prog->float_min_offset;
+ }
+ if (minlen && (dontbother < minlen))
+ dontbother = minlen - 1;
+ strend -= dontbother; /* this one's always in bytes! */
+ /* We don't know much -- general case. */
+ if (UTF) {
+ for (;;) {
+ if (regtry(prog, s))
+ goto got_it;
+ if (s >= strend)
+ break;
s += UTF8SKIP(s);
+ };
+ }
+ else {
+ do {
+ if (regtry(prog, s))
+ goto got_it;
+ } while (s++ < strend);
+ }
+ }
+
+ /* Failure. */
+ goto phooey;
+
+got_it:
+ RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted);
+
+ if (PL_reg_eval_set) {
+ /* Preserve the current value of $^R */
+ if (oreplsv != GvSV(PL_replgv))
+ sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is
+ restored, the value remains
+ the same. */
+ restore_pos(aTHXo_ 0);
+ }
+
+ /* make sure $`, $&, $', and $digit will work later */
+ if ( !(flags & REXEC_NOT_FIRST) ) {
+ if (RX_MATCH_COPIED(prog)) {
+ Safefree(prog->subbeg);
+ RX_MATCH_COPIED_off(prog);
+ }
+ if (flags & REXEC_COPY_STR) {
+ I32 i = PL_regeol - startpos + (stringarg - strbeg);
+
+ s = savepvn(strbeg, i);
+ prog->subbeg = s;
+ prog->sublen = i;
+ RX_MATCH_COPIED_on(prog);
+ }
+ else {
+ prog->subbeg = strbeg;
+ prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
+ }
+ }
+
+ return 1;
+
+phooey:
+ if (PL_reg_eval_set)
+ restore_pos(aTHXo_ 0);
+ return 0;
+}
+
+/*
+ - regtry - try match at specific point
+ */
+STATIC I32 /* 0 failure, 1 success */
+S_regtry(pTHX_ regexp *prog, char *startpos)
+{
+ dTHR;
+ register I32 i;
+ register I32 *sp;
+ register I32 *ep;
+ CHECKPOINT lastcp;
+
+ if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) {
+ MAGIC *mg;
+
+ PL_reg_eval_set = RS_init;
+ DEBUG_r(DEBUG_s(
+ PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n",
+ PL_stack_sp - PL_stack_base);
+ ));
+ SAVEINT(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);
+ cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
+
+ if (PL_reg_sv) {
+ /* Make $_ available to executed code. */
+ if (PL_reg_sv != DEFSV) {
+ /* SAVE_DEFSV does *not* suffice here for USE_THREADS */
+ SAVESPTR(DEFSV);
+ DEFSV = PL_reg_sv;
}
- break;
- case ASCII:
- while (s < strend) {
- if (isASCII(*(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NASCII:
- while (s < strend) {
- if (!isASCII(*(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case CNTRL:
- while (s < strend) {
- if (isCNTRL(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
+
+ if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv)
+ && (mg = mg_find(PL_reg_sv, 'g')))) {
+ /* prepare for quick setting of pos */
+ sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0);
+ mg = mg_find(PL_reg_sv, 'g');
+ mg->mg_len = -1;
}
- break;
- case CNTRLUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_cntrl,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case CNTRLL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isCNTRL_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case CNTRLLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isCNTRL_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NCNTRL:
- while (s < strend) {
- if (!isCNTRL(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NCNTRLUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_cntrl,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NCNTRLL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isCNTRL_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NCNTRLLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isCNTRL_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case GRAPH:
- while (s < strend) {
- if (isGRAPH(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case GRAPHUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_graph,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case GRAPHL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isGRAPH_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case GRAPHLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isGRAPH_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NGRAPH:
- while (s < strend) {
- if (!isGRAPH(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NGRAPHUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_graph,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NGRAPHL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isGRAPH_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NGRAPHLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isGRAPH_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case LOWER:
- while (s < strend) {
- if (isLOWER(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case LOWERUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_lower,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case LOWERL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isLOWER_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case LOWERLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isLOWER_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NLOWER:
- while (s < strend) {
- if (!isLOWER(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NLOWERUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_lower,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NLOWERL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isLOWER_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NLOWERLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isLOWER_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case PRINT:
- while (s < strend) {
- if (isPRINT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case PRINTUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_print,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case PRINTL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isPRINT_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case PRINTLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isPRINT_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NPRINT:
- while (s < strend) {
- if (!isPRINT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NPRINTUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_print,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NPRINTL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isPRINT_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NPRINTLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isPRINT_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case PUNCT:
- while (s < strend) {
- if (isPUNCT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case PUNCTUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_punct,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case PUNCTL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isPUNCT_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case PUNCTLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isPUNCT_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NPUNCT:
- while (s < strend) {
- if (!isPUNCT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NPUNCTUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_punct,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NPUNCTL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isPUNCT_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NPUNCTLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isPUNCT_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case UPPER:
- while (s < strend) {
- if (isUPPER(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case UPPERUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_upper,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case UPPERL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isUPPER_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case UPPERLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (*s == ' ' || isUPPER_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NUPPER:
- while (s < strend) {
- if (!isUPPER(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NUPPERUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_upper,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case NUPPERL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isUPPER_LC(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NUPPERLUTF8:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (!isUPPER_LC_utf8((U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case XDIGIT:
- while (s < strend) {
- if (isXDIGIT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NXDIGIT:
- while (s < strend) {
- if (!isXDIGIT(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- }
- }
- 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,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurence. */
- }
- else {
- STRLEN len;
- char *little = SvPV(prog->float_substr, len);
-
- if (SvTAIL(prog->float_substr)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!PL_multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : Nullch;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching `$' */
- }
- }
- if (last == NULL) goto phooey; /* Should not happen! */
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (UTF) {
- for (;;) {
- if (regtry(prog, s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(prog, s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set) {
- /* Preserve the current value of $^R */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is
- restored, the value remains
- the same. */
- restore_pos(aTHXo_ 0);
- }
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- if (RX_MATCH_COPIED(prog)) {
- Safefree(prog->subbeg);
- RX_MATCH_COPIED_off(prog);
- }
- if (flags & REXEC_COPY_STR) {
- I32 i = PL_regeol - startpos + (stringarg - strbeg);
-
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- prog->sublen = i;
- RX_MATCH_COPIED_on(prog);
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- if (PL_reg_eval_set)
- restore_pos(aTHXo_ 0);
- return 0;
-}
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regexp *prog, char *startpos)
-{
- dTHR;
- register I32 i;
- register I32 *sp;
- register I32 *ep;
- CHECKPOINT lastcp;
-
- if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n",
- PL_stack_sp - PL_stack_base);
- ));
- SAVEINT(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);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (PL_reg_sv) {
- /* Make $_ available to executed code. */
- if (PL_reg_sv != DEFSV) {
- /* SAVE_DEFSV does *not* suffice here for USE_THREADS */
- SAVESPTR(DEFSV);
- DEFSV = PL_reg_sv;
- }
-
- if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv)
- && (mg = mg_find(PL_reg_sv, 'g')))) {
- /* prepare for quick setting of pos */
- sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0);
- mg = mg_find(PL_reg_sv, 'g');
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR(restore_pos, 0);
- }
- if (!PL_reg_curpm)
- New(22,PL_reg_curpm, 1, PMOP);
- PL_reg_curpm->op_pmregexp = prog;
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RX_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
- RX_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = Nullch;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- prog->startp[0] = startpos - PL_bostr;
- PL_reginput = startpos;
- PL_regstartp = prog->startp;
- PL_regendp = prog->endp;
- PL_reglastparen = &prog->lastparen;
- prog->lastparen = 0;
- PL_regsize = 0;
- DEBUG_r(PL_reg_starttry = startpos);
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! */
- sp = prog->startp;
- ep = prog->endp;
- if (prog->nparens) {
- for (i = prog->nparens; i >= 1; i--) {
- *++sp = -1;
- *++ep = -1;
- }
- }
- REGCP_SET;
- if (regmatch(prog->program + 1)) {
- prog->endp[0] = PL_reginput - PL_bostr;
- return 1;
- }
- REGCP_UNWIND;
- return 0;
-}
-
-/*
- - regmatch - main matching routine
- *
- * Conceptually the strategy is simple: check to see whether the current
- * node matches, call self recursively to see whether the rest matches,
- * and then act accordingly. In practice we make some effort to avoid
- * recursion, in particular by going through "ordinary" nodes (that don't
- * need to know whether the rest of the match failed) by a loop instead of
- * by recursion.
- */
-/* [lwall] I've hoisted the register declarations to the outer block in order to
- * maybe save a little bit of pushing and popping on the stack. It also takes
- * advantage of machines that use a register save mask on subroutine entry.
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regnode *prog)
-{
- dTHR;
- register regnode *scan; /* Current node. */
- regnode *next; /* Next node. */
- regnode *inner; /* Next node in internal branch. */
- register I32 nextchr; /* renamed nextchr - nextchar colides with
- function of same name */
- register I32 n; /* no or next */
- register I32 ln; /* len or last */
- register char *s; /* operand or save */
- register char *locinput = PL_reginput;
- register I32 c1, c2, paren; /* case fold search, parenth */
- int minmod = 0, sw = 0, logical = 0;
-#ifdef DEBUGGING
- PL_regindent++;
-#endif
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-#define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO)
-#ifdef DEBUGGING
-# define sayYES goto yes
-# define sayNO goto no
-# define saySAME(x) if (x) goto yes; else goto no
-# define REPORT_CODE_OFF 24
-#else
-# define sayYES return 1
-# define sayNO return 0
-# define saySAME(x) return x
-#endif
- DEBUG_r( {
- SV *prop = sv_newmortal();
- int docolor = *PL_colors[0];
- int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - PL_bostr > (5 + taill) - l
- ? (5 + taill) - l : locinput - PL_bostr);
- int pref0_len = pref_len - (locinput - PL_reg_starttry);
-
- if (l + pref_len < (5 + taill) && l < PL_regeol - locinput)
- l = ( PL_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : PL_regeol - locinput);
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- regprop(prop, scan);
- PerlIO_printf(Perl_debug_log,
- "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n",
- locinput - PL_bostr,
- PL_colors[4], pref0_len,
- locinput - pref_len, PL_colors[5],
- PL_colors[2], pref_len - pref0_len,
- locinput - pref_len + pref0_len, PL_colors[3],
- (docolor ? "" : "> <"),
- PL_colors[0], l, locinput, PL_colors[1],
- 15 - l - pref_len + 1,
- "",
- scan - PL_regprogram, PL_regindent*2, "",
- SvPVX(prop));
- } );
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
-
- switch (OP(scan)) {
- case BOL:
- if (locinput == PL_bostr
- ? PL_regprev == '\n'
- : (PL_multiline &&
- (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
- {
- /* regtill = regbol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr
- ? PL_regprev == '\n'
- : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_regbol && PL_regprev == '\n')
- break;
- sayNO;
- case GPOS:
- if (locinput == PL_reg_ganch)
- break;
- sayNO;
- case EOL:
- if (PL_multiline)
- goto meol;
- else
- goto seol;
- case MEOL:
- meol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANYUTF8:
- if (nextchr & 0x80) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ANYUTF8:
- if (nextchr & 0x80) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case EXACT:
- s = (char *) OPERAND(scan);
- ln = UCHARAT(s++);
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF:
- s = (char *) OPERAND(scan);
- ln = UCHARAT(s++);
-
- if (UTF) {
- char *l = locinput;
- char *e = s + ln;
- c1 = OP(scan) == EXACTF;
- while (s < e) {
- if (l >= PL_regeol)
- sayNO;
- if (utf8_to_uv((U8*)s, 0) != (c1 ?
- toLOWER_utf8((U8*)l) :
- toLOWER_LC_utf8((U8*)l)))
- {
- sayNO;
- }
- s += UTF8SKIP(s);
- l += UTF8SKIP(l);
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- case ANYOFUTF8:
- s = (char *) OPERAND(scan);
- if (!REGINCLASSUTF8(scan, (U8*)locinput))
- sayNO;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- case ANYOF:
- s = (char *) OPERAND(scan);
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(s, nextchr))
- sayNO;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUM:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == ALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALNUMLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUMUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == ALNUMUTF8
- ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
- : isALNUM_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == ALNUMUTF8
- ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUM:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (OP(scan) == NALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUMLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUMUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (OP(scan) == NALNUMUTF8
- ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
- : isALNUM_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NALNUMUTF8
- ? isALNUM(nextchr) : isALNUM_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev;
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL))
- sayNO;
- break;
- case BOUNDLUTF8:
- case NBOUNDLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUNDUTF8:
- case NBOUNDUTF8:
- /* was last char in word? */
- ln = (locinput != PL_regbol)
- ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev;
- if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) {
- ln = isALNUM_uni(ln);
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput);
- }
- else {
- ln = isALNUM_LC_uni(ln);
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8))
- sayNO;
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case SPACE:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (!(OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case SPACELUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case SPACEUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == SPACEUTF8
- ? swash_fetch(PL_utf8_space,(U8*)locinput)
- : isSPACE_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == SPACEUTF8
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NSPACE:
- if (!nextchr)
- sayNO;
- if (OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NSPACELUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NSPACEUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (OP(scan) == NSPACEUTF8
- ? swash_fetch(PL_utf8_space,(U8*)locinput)
- : isSPACE_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NSPACEUTF8
- ? isSPACE(nextchr) : isSPACE_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case DIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case DIGIT:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (!(OP(scan) == DIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case DIGITLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case DIGITUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- 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))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NDIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NDIGIT:
- if (!nextchr)
- sayNO;
- if (OP(scan) == DIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NDIGITLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NDIGITUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_digit,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (isDIGIT(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALNUMCL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUMC:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == ALNUMC
- ? isALNUMC(nextchr) : isALNUMC_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALNUMCLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUMCUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == ALNUMCUTF8
- ? swash_fetch(PL_utf8_alnumc, (U8*)locinput)
- : isALNUMC_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == ALNUMCUTF8
- ? isALNUMC(nextchr) : isALNUMC_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUMCL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUMC:
- if (!nextchr)
- sayNO;
- if (OP(scan) == ALNUMC
- ? isALNUMC(nextchr) : isALNUMC_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUMCLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUMCUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_alnumc,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
+ PL_reg_magic = mg;
+ PL_reg_oldpos = mg->mg_len;
+ SAVEDESTRUCTOR(restore_pos, 0);
+ }
+ if (!PL_reg_curpm)
+ New(22,PL_reg_curpm, 1, PMOP);
+ PL_reg_curpm->op_pmregexp = prog;
+ PL_reg_oldcurpm = PL_curpm;
+ PL_curpm = PL_reg_curpm;
+ if (RX_MATCH_COPIED(prog)) {
+ /* Here is a serious problem: we cannot rewrite subbeg,
+ since it may be needed if this match fails. Thus
+ $` inside (?{}) could fail... */
+ PL_reg_oldsaved = prog->subbeg;
+ PL_reg_oldsavedlen = prog->sublen;
+ RX_MATCH_COPIED_off(prog);
+ }
+ else
+ PL_reg_oldsaved = Nullch;
+ prog->subbeg = PL_bostr;
+ prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
+ }
+ prog->startp[0] = startpos - PL_bostr;
+ PL_reginput = startpos;
+ PL_regstartp = prog->startp;
+ PL_regendp = prog->endp;
+ PL_reglastparen = &prog->lastparen;
+ prog->lastparen = 0;
+ PL_regsize = 0;
+ DEBUG_r(PL_reg_starttry = startpos);
+ if (PL_reg_start_tmpl <= prog->nparens) {
+ PL_reg_start_tmpl = prog->nparens*3/2 + 3;
+ if(PL_reg_start_tmp)
+ Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
+ else
+ New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*);
+ }
+
+ /* XXXX What this code is doing here?!!! There should be no need
+ to do this again and again, PL_reglastparen should take care of
+ this! */
+ sp = prog->startp;
+ ep = prog->endp;
+ if (prog->nparens) {
+ for (i = prog->nparens; i >= 1; i--) {
+ *++sp = -1;
+ *++ep = -1;
+ }
+ }
+ REGCP_SET;
+ if (regmatch(prog->program + 1)) {
+ prog->endp[0] = PL_reginput - PL_bostr;
+ return 1;
+ }
+ REGCP_UNWIND;
+ return 0;
+}
+
+/*
+ - regmatch - main matching routine
+ *
+ * Conceptually the strategy is simple: check to see whether the current
+ * node matches, call self recursively to see whether the rest matches,
+ * and then act accordingly. In practice we make some effort to avoid
+ * recursion, in particular by going through "ordinary" nodes (that don't
+ * need to know whether the rest of the match failed) by a loop instead of
+ * by recursion.
+ */
+/* [lwall] I've hoisted the register declarations to the outer block in order to
+ * maybe save a little bit of pushing and popping on the stack. It also takes
+ * advantage of machines that use a register save mask on subroutine entry.
+ */
+STATIC I32 /* 0 failure, 1 success */
+S_regmatch(pTHX_ regnode *prog)
+{
+ dTHR;
+ register regnode *scan; /* Current node. */
+ regnode *next; /* Next node. */
+ regnode *inner; /* Next node in internal branch. */
+ register I32 nextchr; /* renamed nextchr - nextchar colides with
+ function of same name */
+ register I32 n; /* no or next */
+ register I32 ln; /* len or last */
+ register char *s; /* operand or save */
+ register char *locinput = PL_reginput;
+ register I32 c1, c2, paren; /* case fold search, parenth */
+ int minmod = 0, sw = 0, logical = 0;
+#ifdef DEBUGGING
+ PL_regindent++;
+#endif
+
+ /* Note that nextchr is a byte even in UTF */
+ nextchr = UCHARAT(locinput);
+ scan = prog;
+ while (scan != NULL) {
+#define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO)
+#ifdef DEBUGGING
+# define sayYES goto yes
+# define sayNO goto no
+# define saySAME(x) if (x) goto yes; else goto no
+# define REPORT_CODE_OFF 24
+#else
+# define sayYES return 1
+# define sayNO return 0
+# define saySAME(x) return x
+#endif
+ DEBUG_r( {
+ SV *prop = sv_newmortal();
+ int docolor = *PL_colors[0];
+ int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
+ int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput);
+ /* The part of the string before starttry has one color
+ (pref0_len chars), between starttry and current
+ position another one (pref_len - pref0_len chars),
+ after the current position the third one.
+ We assume that pref0_len <= pref_len, otherwise we
+ decrease pref0_len. */
+ int pref_len = (locinput - PL_bostr > (5 + taill) - l
+ ? (5 + taill) - l : locinput - PL_bostr);
+ int pref0_len = pref_len - (locinput - PL_reg_starttry);
+
+ if (l + pref_len < (5 + taill) && l < PL_regeol - locinput)
+ l = ( PL_regeol - locinput > (5 + taill) - pref_len
+ ? (5 + taill) - pref_len : PL_regeol - locinput);
+ if (pref0_len < 0)
+ pref0_len = 0;
+ if (pref0_len > pref_len)
+ pref0_len = pref_len;
+ regprop(prop, scan);
+ PerlIO_printf(Perl_debug_log,
+ "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n",
+ locinput - PL_bostr,
+ PL_colors[4], pref0_len,
+ locinput - pref_len, PL_colors[5],
+ PL_colors[2], pref_len - pref0_len,
+ locinput - pref_len + pref0_len, PL_colors[3],
+ (docolor ? "" : "> <"),
+ PL_colors[0], l, locinput, PL_colors[1],
+ 15 - l - pref_len + 1,
+ "",
+ scan - PL_regprogram, PL_regindent*2, "",
+ SvPVX(prop));
+ } );
+
+ next = scan + NEXT_OFF(scan);
+ if (next == scan)
+ next = NULL;
+
+ switch (OP(scan)) {
+ case BOL:
+ if (locinput == PL_bostr
+ ? PL_regprev == '\n'
+ : (PL_multiline &&
+ (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
+ {
+ /* regtill = regbol; */
break;
}
- if (isALNUMC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALPHAL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALPHA:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == ALPHA
- ? isALPHA(nextchr) : isALPHA_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ALPHALUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALPHAUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == ALPHAUTF8
- ? swash_fetch(PL_utf8_alpha, (U8*)locinput)
- : isALPHA_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
+ sayNO;
+ case MBOL:
+ if (locinput == PL_bostr
+ ? PL_regprev == '\n'
+ : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
+ {
break;
}
- if (!(OP(scan) == ALPHAUTF8
- ? isALPHA(nextchr) : isALPHA_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALPHAL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALPHA:
- if (!nextchr)
- sayNO;
- if (OP(scan) == ALPHA
- ? isALPHA(nextchr) : isALPHA_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALPHALUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALPHAUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_alpha,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
+ sayNO;
+ case SBOL:
+ if (locinput == PL_regbol && PL_regprev == '\n')
break;
- }
- if (isALPHA(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case ASCII:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (!isASCII(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NASCII:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (isASCII(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case CNTRLL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case CNTRL:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == CNTRL
- ? isCNTRL(nextchr) : isCNTRL_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case CNTRLLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case CNTRLUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == CNTRLUTF8
- ? swash_fetch(PL_utf8_cntrl, (U8*)locinput)
- : isCNTRL_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
+ sayNO;
+ case GPOS:
+ if (locinput == PL_reg_ganch)
break;
- }
- if (!(OP(scan) == CNTRLUTF8
- ? isCNTRL(nextchr) : isCNTRL_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NCNTRLL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NCNTRL:
- if (!nextchr)
- sayNO;
- if (OP(scan) == CNTRL
- ? isCNTRL(nextchr) : isCNTRL_LC(nextchr))
+ sayNO;
+ case EOL:
+ if (PL_multiline)
+ goto meol;
+ else
+ goto seol;
+ case MEOL:
+ meol:
+ if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case NCNTRLLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NCNTRLUTF8:
- if (!nextchr && locinput >= PL_regeol)
+ case SEOL:
+ seol:
+ if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_cntrl,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (isCNTRL(nextchr))
+ if (PL_regeol - locinput > 1)
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case GRAPHL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case GRAPH:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == GRAPH
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
+ case EOS:
+ if (PL_regeol != locinput)
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case GRAPHLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case GRAPHUTF8:
- if (!nextchr)
- sayNO;
+ case SANYUTF8:
if (nextchr & 0x80) {
- if (!(OP(scan) == GRAPHUTF8
- ? swash_fetch(PL_utf8_graph, (U8*)locinput)
- : isGRAPH_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
locinput += PL_utf8skip[nextchr];
+ if (locinput > PL_regeol)
+ sayNO;
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == GRAPHUTF8
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NGRAPHL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NGRAPH:
- if (!nextchr)
- sayNO;
- if (OP(scan) == GRAPH
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr))
+ case SANY:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NGRAPHLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NGRAPHUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
+ case ANYUTF8:
if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_graph,(U8*)locinput))
- sayNO;
locinput += PL_utf8skip[nextchr];
+ if (locinput > PL_regeol)
+ sayNO;
nextchr = UCHARAT(locinput);
break;
}
- if (isGRAPH(nextchr))
+ if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case LOWERL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case LOWER:
- if (!nextchr)
- sayNO;
- if (!(OP(scan) == LOWER
- ? isLOWER(nextchr) : isLOWER_LC(nextchr)))
+ case REG_ANY:
+ if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case LOWERLUTF8:
+ case EXACT:
+ s = STRING(scan);
+ ln = STR_LEN(scan);
+ /* Inline the first character, for speed. */
+ if (UCHARAT(s) != nextchr)
+ sayNO;
+ if (PL_regeol - locinput < ln)
+ sayNO;
+ if (ln > 1 && memNE(s, locinput, ln))
+ sayNO;
+ locinput += ln;
+ nextchr = UCHARAT(locinput);
+ break;
+ case EXACTFL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case LOWERUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == LOWERUTF8
- ? swash_fetch(PL_utf8_lower, (U8*)locinput)
- : isLOWER_LC_utf8((U8*)locinput)))
- {
- sayNO;
+ case EXACTF:
+ s = STRING(scan);
+ ln = STR_LEN(scan);
+
+ if (UTF) {
+ char *l = locinput;
+ char *e = s + ln;
+ c1 = OP(scan) == EXACTF;
+ while (s < e) {
+ if (l >= PL_regeol)
+ sayNO;
+ if (utf8_to_uv((U8*)s, 0) != (c1 ?
+ toLOWER_utf8((U8*)l) :
+ toLOWER_LC_utf8((U8*)l)))
+ {
+ sayNO;
+ }
+ s += UTF8SKIP(s);
+ l += UTF8SKIP(l);
}
- locinput += PL_utf8skip[nextchr];
+ locinput = l;
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == LOWERUTF8
- ? isLOWER(nextchr) : isLOWER_LC(nextchr)))
+
+ /* Inline the first character, for speed. */
+ if (UCHARAT(s) != nextchr &&
+ UCHARAT(s) != ((OP(scan) == EXACTF)
+ ? PL_fold : PL_fold_locale)[nextchr])
+ sayNO;
+ if (PL_regeol - locinput < ln)
+ sayNO;
+ if (ln > 1 && (OP(scan) == EXACTF
+ ? ibcmp(s, locinput, ln)
+ : ibcmp_locale(s, locinput, ln)))
+ sayNO;
+ locinput += ln;
+ nextchr = UCHARAT(locinput);
+ break;
+ case ANYOFUTF8:
+ s = MASK(scan);
+ if (!REGINCLASSUTF8(scan, (U8*)locinput))
+ sayNO;
+ if (locinput >= PL_regeol)
+ sayNO;
+ locinput += PL_utf8skip[nextchr];
+ nextchr = UCHARAT(locinput);
+ break;
+ case ANYOF:
+ s = MASK(scan);
+ if (nextchr < 0)
+ nextchr = UCHARAT(locinput);
+ if (!REGINCLASS(s, nextchr))
+ sayNO;
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NLOWERL:
+ case ALNUML:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NLOWER:
+ case ALNUM:
if (!nextchr)
sayNO;
- if (OP(scan) == LOWER
- ? isLOWER(nextchr) : isLOWER_LC(nextchr))
+ if (!(OP(scan) == ALNUM
+ ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NLOWERLUTF8:
+ case ALNUMLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NLOWERUTF8:
- if (!nextchr && locinput >= PL_regeol)
+ case ALNUMUTF8:
+ if (!nextchr)
sayNO;
if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_lower,(U8*)locinput))
+ if (!(OP(scan) == ALNUMUTF8
+ ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
+ : isALNUM_LC_utf8((U8*)locinput)))
+ {
sayNO;
+ }
locinput += PL_utf8skip[nextchr];
nextchr = UCHARAT(locinput);
break;
}
- if (isLOWER(nextchr))
+ if (!(OP(scan) == ALNUMUTF8
+ ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case PRINTL:
+ case NALNUML:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case PRINT:
- if (!nextchr)
+ case NALNUM:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (!(OP(scan) == PRINT
- ? isPRINT(nextchr) : isPRINT_LC(nextchr)))
+ if (OP(scan) == NALNUM
+ ? isALNUM(nextchr) : isALNUM_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case PRINTLUTF8:
+ case NALNUMLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case PRINTUTF8:
- if (!nextchr)
+ case NALNUMUTF8:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
if (nextchr & 0x80) {
- if (!(OP(scan) == PRINTUTF8
- ? swash_fetch(PL_utf8_print, (U8*)locinput)
- : isPRINT_LC_utf8((U8*)locinput)))
+ if (OP(scan) == NALNUMUTF8
+ ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
+ : isALNUM_LC_utf8((U8*)locinput))
{
sayNO;
}
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == PRINTUTF8
- ? isPRINT(nextchr) : isPRINT_LC(nextchr)))
+ if (OP(scan) == NALNUMUTF8
+ ? isALNUM(nextchr) : isALNUM_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NPRINTL:
+ case BOUNDL:
+ case NBOUNDL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NPRINT:
- if (!nextchr)
- sayNO;
- if (OP(scan) == PRINT
- ? isPRINT(nextchr) : isPRINT_LC(nextchr))
+ case BOUND:
+ case NBOUND:
+ /* was last char in word? */
+ ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev;
+ if (OP(scan) == BOUND || OP(scan) == NBOUND) {
+ ln = isALNUM(ln);
+ n = isALNUM(nextchr);
+ }
+ else {
+ ln = isALNUM_LC(ln);
+ n = isALNUM_LC(nextchr);
+ }
+ if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL))
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case NPRINTLUTF8:
+ case BOUNDLUTF8:
+ case NBOUNDLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NPRINTUTF8:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_print,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
+ case BOUNDUTF8:
+ case NBOUNDUTF8:
+ /* was last char in word? */
+ ln = (locinput != PL_regbol)
+ ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev;
+ if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) {
+ ln = isALNUM_uni(ln);
+ n = swash_fetch(PL_utf8_alnum, (U8*)locinput);
+ }
+ else {
+ ln = isALNUM_LC_uni(ln);
+ n = isALNUM_LC_utf8((U8*)locinput);
}
- if (isPRINT(nextchr))
+ if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8))
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case PUNCTL:
+ case SPACEL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case PUNCT:
- if (!nextchr)
+ case SPACE:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (!(OP(scan) == PUNCT
- ? isPUNCT(nextchr) : isPUNCT_LC(nextchr)))
+ if (!(OP(scan) == SPACE
+ ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case PUNCTLUTF8:
+ case SPACELUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case PUNCTUTF8:
- if (!nextchr)
+ case SPACEUTF8:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
if (nextchr & 0x80) {
- if (!(OP(scan) == PUNCTUTF8
- ? swash_fetch(PL_utf8_punct, (U8*)locinput)
- : isPUNCT_LC_utf8((U8*)locinput)))
+ if (!(OP(scan) == SPACEUTF8
+ ? swash_fetch(PL_utf8_space,(U8*)locinput)
+ : isSPACE_LC_utf8((U8*)locinput)))
{
sayNO;
}
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == PUNCTUTF8
- ? isPUNCT(nextchr) : isPUNCT_LC(nextchr)))
+ if (!(OP(scan) == SPACEUTF8
+ ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NPUNCTL:
+ case NSPACEL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NPUNCT:
+ case NSPACE:
if (!nextchr)
sayNO;
- if (OP(scan) == PUNCT
- ? isPUNCT(nextchr) : isPUNCT_LC(nextchr))
+ if (OP(scan) == SPACE
+ ? isSPACE(nextchr) : isSPACE_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NPUNCTLUTF8:
+ case NSPACELUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NPUNCTUTF8:
- if (!nextchr && locinput >= PL_regeol)
+ case NSPACEUTF8:
+ if (!nextchr)
sayNO;
if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_punct,(U8*)locinput))
+ if (OP(scan) == NSPACEUTF8
+ ? swash_fetch(PL_utf8_space,(U8*)locinput)
+ : isSPACE_LC_utf8((U8*)locinput))
+ {
sayNO;
+ }
locinput += PL_utf8skip[nextchr];
nextchr = UCHARAT(locinput);
break;
}
- if (isPUNCT(nextchr))
+ if (OP(scan) == NSPACEUTF8
+ ? isSPACE(nextchr) : isSPACE_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case UPPERL:
+ case DIGITL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case UPPER:
- if (!nextchr)
+ case DIGIT:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (!(OP(scan) == UPPER
- ? isUPPER(nextchr) : isUPPER_LC(nextchr)))
+ if (!(OP(scan) == DIGIT
+ ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case UPPERLUTF8:
+ case DIGITLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case UPPERUTF8:
+ case DIGITUTF8:
if (!nextchr)
sayNO;
if (nextchr & 0x80) {
- if (!(OP(scan) == UPPERUTF8
- ? swash_fetch(PL_utf8_upper, (U8*)locinput)
- : isUPPER_LC_utf8((U8*)locinput)))
+ if (OP(scan) == NDIGITUTF8
+ ? swash_fetch(PL_utf8_digit,(U8*)locinput)
+ : isDIGIT_LC_utf8((U8*)locinput))
{
sayNO;
}
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == UPPERUTF8
- ? isUPPER(nextchr) : isUPPER_LC(nextchr)))
+ if (!isDIGIT(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NUPPERL:
+ case NDIGITL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NUPPER:
+ case NDIGIT:
if (!nextchr)
sayNO;
- if (OP(scan) == UPPER
- ? isUPPER(nextchr) : isUPPER_LC(nextchr))
+ if (OP(scan) == DIGIT
+ ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NUPPERLUTF8:
+ case NDIGITLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NUPPERUTF8:
+ case NDIGITUTF8:
if (!nextchr && locinput >= PL_regeol)
sayNO;
if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_upper,(U8*)locinput))
+ if (swash_fetch(PL_utf8_digit,(U8*)locinput))
sayNO;
locinput += PL_utf8skip[nextchr];
nextchr = UCHARAT(locinput);
break;
}
- if (isUPPER(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case XDIGIT:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (!isXDIGIT(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NXDIGIT:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (isXDIGIT(nextchr))
+ if (isDIGIT(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
regexp *re;
MAGIC *mg = Null(MAGIC*);
re_cc_state state;
- CURCUR cctmp;
CHECKPOINT cp, lastcp;
if(SvROK(ret) || SvRMAGICAL(ret)) {
state.cc = PL_regcc;
state.re = PL_reg_re;
- cctmp.cur = 0;
- cctmp.oldcc = 0;
- PL_regcc = &cctmp;
+ PL_regcc = 0;
cp = regcppush(0); /* Save *all* the positions. */
REGCP_SET;
PL_reg_maxiter = 0;
if (regmatch(re->program + 1)) {
+ /* Even though we succeeded, we need to restore
+ global variables, since we may be wrapped inside
+ SUSPEND, thus the match may be not finished yet. */
+
+ /* XXXX Do this only if SUSPENDed? */
+ PL_reg_call_cc = state.prev;
+ PL_regcc = state.cc;
+ PL_reg_re = state.re;
+ cache_re(PL_reg_re);
+
+ /* XXXX This is too dramatic a measure... */
+ PL_reg_maxiter = 0;
+
+ /* These are needed even if not SUSPEND. */
ReREFCNT_dec(re);
regcpblow(cp);
sayYES;
case LOGICAL:
logical = scan->flags;
break;
+/*******************************************************************
+ PL_regcc contains infoblock about the innermost (...)* loop, and
+ a pointer to the next outer infoblock.
+
+ Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM):
+
+ 1) After matching X, regnode for CURLYX is processed;
+
+ 2) This regnode creates infoblock on the stack, and calls
+ regmatch() recursively with the starting point at WHILEM node;
+
+ 3) Each hit of WHILEM node tries to match A and Z (in the order
+ depending on the current iteration, min/max of {min,max} and
+ greediness). The information about where are nodes for "A"
+ and "Z" is read from the infoblock, as is info on how many times "A"
+ was already matched, and greediness.
+
+ 4) After A matches, the same WHILEM node is hit again.
+
+ 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX
+ of the same pair. Thus when WHILEM tries to match Z, it temporarily
+ resets PL_regcc, since this Y(A)*Z can be a part of some other loop:
+ as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node
+ of the external loop.
+
+ Currently present infoblocks form a tree with a stem formed by PL_curcc
+ and whatever it mentions via ->next, and additional attached trees
+ corresponding to temporarily unset infoblocks as in "5" above.
+
+ In the following picture infoblocks for outer loop of
+ (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block
+ is denoted by x. The matched string is YAAZYAZT. Temporarily postponed
+ infoblocks are drawn below the "reset" infoblock.
+
+ In fact in the picture below we do not show failed matches for Z and T
+ by WHILEM blocks. [We illustrate minimal matches, since for them it is
+ more obvious *why* one needs to *temporary* unset infoblocks.]
+
+ Matched REx position InfoBlocks Comment
+ (Y(A)*?Z)*?T x
+ Y(A)*?Z)*?T x <- O
+ Y (A)*?Z)*?T x <- O
+ Y A)*?Z)*?T x <- O <- I
+ YA )*?Z)*?T x <- O <- I
+ YA A)*?Z)*?T x <- O <- I
+ YAA )*?Z)*?T x <- O <- I
+ YAA Z)*?T x <- O # Temporary unset I
+ I
+
+ YAAZ Y(A)*?Z)*?T x <- O
+ I
+
+ YAAZY (A)*?Z)*?T x <- O
+ I
+
+ YAAZY A)*?Z)*?T x <- O <- I
+ I
+
+ YAAZYA )*?Z)*?T x <- O <- I
+ I
+
+ YAAZYA Z)*?T x <- O # Temporary unset I
+ I,I
+
+ YAAZYAZ )*?T x <- O
+ I,I
+
+ YAAZYAZ T x # Temporary unset O
+ O
+ I,I
+
+ YAAZYAZT x
+ O
+ I,I
+ *******************************************************************/
case CURLYX: {
CURCUR cc;
CHECKPOINT cp = PL_savestack_ix;
if (locinput == cc->lastloc && n >= cc->min) {
PL_regcc = cc->oldcc;
- ln = PL_regcc->cur;
+ if (PL_regcc)
+ ln = PL_regcc->cur;
DEBUG_r(
PerlIO_printf(Perl_debug_log,
"%*s empty match detected, try continuation...\n",
"%*s failed...\n",
REPORT_CODE_OFF+PL_regindent*2, "")
);
- PL_regcc->cur = ln;
+ if (PL_regcc)
+ PL_regcc->cur = ln;
PL_regcc = cc;
sayNO;
}
if (cc->minmod) {
PL_regcc = cc->oldcc;
- ln = PL_regcc->cur;
+ if (PL_regcc)
+ ln = PL_regcc->cur;
cp = regcppush(cc->parenfloor);
REGCP_SET;
if (regmatch(cc->next)) {
}
REGCP_UNWIND;
regcppop();
- PL_regcc->cur = ln;
+ if (PL_regcc)
+ PL_regcc->cur = ln;
PL_regcc = cc;
if (n >= cc->max) { /* Maximum greed exceeded? */
/* Failed deeper matches of scan, so see if this one works. */
PL_regcc = cc->oldcc;
- ln = PL_regcc->cur;
+ if (PL_regcc)
+ ln = PL_regcc->cur;
if (regmatch(cc->next))
sayYES;
DEBUG_r(
PerlIO_printf(Perl_debug_log, "%*s failed...\n",
REPORT_CODE_OFF+PL_regindent*2, "")
);
- PL_regcc->cur = ln;
+ if (PL_regcc)
+ PL_regcc->cur = ln;
PL_regcc = cc;
cc->cur = n - 1;
cc->lastloc = lastloc;
ln = n;
locinput = PL_reginput;
if (PL_regkind[(U8)OP(next)] == EXACT) {
- c1 = UCHARAT(OPERAND(next) + 1);
+ c1 = (U8)*STRING(next);
if (OP(next) == EXACTF)
c2 = PL_fold[c1];
else if (OP(next) == EXACTFL)
);
if (n >= ln) {
if (PL_regkind[(U8)OP(next)] == EXACT) {
- c1 = UCHARAT(OPERAND(next) + 1);
+ c1 = (U8)*STRING(next);
if (OP(next) == EXACTF)
c2 = PL_fold[c1];
else if (OP(next) == EXACTFL)
* when we know what character comes next.
*/
if (PL_regkind[(U8)OP(next)] == EXACT) {
- c1 = UCHARAT(OPERAND(next) + 1);
+ c1 = (U8)*STRING(next);
if (OP(next) == EXACTF)
c2 = PL_fold[c1];
else if (OP(next) == EXACTFL)
scan = PL_reginput;
if (max != REG_INFTY && max < loceol - scan)
loceol = scan + max;
- opnd = (char *) OPERAND(p);
switch (OP(p)) {
case REG_ANY:
while (scan < loceol && *scan != '\n')
}
break;
case EXACT: /* length of string is 1 */
- c = UCHARAT(++opnd);
+ c = (U8)*STRING(p);
while (scan < loceol && UCHARAT(scan) == c)
scan++;
break;
case EXACTF: /* length of string is 1 */
- c = UCHARAT(++opnd);
+ c = (U8)*STRING(p);
while (scan < loceol &&
(UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
scan++;
break;
case EXACTFL: /* length of string is 1 */
PL_reg_flags |= RF_tainted;
- c = UCHARAT(++opnd);
+ c = (U8)*STRING(p);
while (scan < loceol &&
(UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
scan++;
}
break;
case ANYOF:
+ opnd = MASK(p);
while (scan < loceol && REGINCLASS(opnd, *scan))
scan++;
break;
projects / p5sagit/p5-mst-13.2.git / blobdiff