PL_reg_re = prog;
}
++static char *find_byclass(regexp * prog, regnode *c, char *s, char *strend,
++ char *startpos, I32 norun);
++
/*
* Need to implement the following flags for reg_anch:
*
/* 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
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)
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
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)) );
/* 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:
{
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)
", 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;
}
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;
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,
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;
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;
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(). */
++ char *endpos = (prog->anchored_substr || ml_anch)
++ ? s + (prog->minlen? 1 : 0)
++ : (prog->float_substr ? check_at - start_shift + 1
++ : strend) ;
++ char *startpos = sv ? strend - SvCUR(sv) : s;
++
++ t = s;
++ 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;
++ }
++ /* Contradict one of substrings */
++ if (prog->anchored_substr) {
++ DEBUG_r( PerlIO_printf(Perl_debug_log,
++ "This position contradicts STCLASS...\n") );
++ if (prog->anchored_substr == check) {
++ DEBUG_r( what = "anchored" );
++ hop_and_restart:
++ PL_regeol = strend; /* Used in HOP() */
++ s = HOPc(t, 1);
++ 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 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;
++ }
++ /* 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;
&& (ln == 1 || (OP(c) == EXACTF
? ibcmp(s, m, ln)
: ibcmp_locale(s, m, ln)))
-- && regtry(prog, s) )
++ && (norun || regtry(prog, s)) )
goto got_it;
s++;
}
&& (ln == 1 || (OP(c) == EXACTF
? ibcmp(s, m, ln)
: ibcmp_locale(s, m, ln)))
-- && regtry(prog, s) )
++ && (norun || regtry(prog, s)) )
goto got_it;
s++;
}
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 = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n';
tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0);
while (s < strend) {
if (tmp == !(OP(c) == BOUND ?
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++;
++ if (prog->minlen)
strend = reghop_c(strend, -1);
-- }
-- tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev;
++ tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n';
tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0);
while (s < strend) {
if (tmp == !(OP(c) == NBOUND ?
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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;
case DIGIT:
while (s < strend) {
if (isDIGIT(*s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
case DIGITUTF8:
while (s < strend) {
if (swash_fetch(PL_utf8_digit,(U8*)s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
PL_reg_flags |= RF_tainted;
while (s < strend) {
if (isDIGIT_LC(*s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
PL_reg_flags |= RF_tainted;
while (s < strend) {
if (isDIGIT_LC_utf8((U8*)s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
case NDIGIT:
while (s < strend) {
if (!isDIGIT(*s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
case NDIGITUTF8:
while (s < strend) {
if (!swash_fetch(PL_utf8_digit,(U8*)s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
PL_reg_flags |= RF_tainted;
while (s < strend) {
if (!isDIGIT_LC(*s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
PL_reg_flags |= RF_tainted;
while (s < strend) {
if (!isDIGIT_LC_utf8((U8*)s)) {
-- if (tmp && regtry(prog, s))
++ if (tmp && (norun || regtry(prog, s)))
goto got_it;
else
tmp = doevery;
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;
++ 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],
++ (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) {
++ if (minlen) /* 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;
projects / platform / upstream / perl.git / commitdiff