*
**** 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.
/* 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)
PL_regendp[paren] = tmps;
DEBUG_r(
PerlIO_printf(Perl_debug_log,
- " restoring \\%d to %d(%d)..%d%s\n",
- paren, PL_regstartp[paren],
- PL_reg_start_tmp[paren] - PL_bostr,
- PL_regendp[paren],
+ " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
+ (UV)paren, (IV)PL_regstartp[paren],
+ (IV)(PL_reg_start_tmp[paren] - PL_bostr),
+ (IV)PL_regendp[paren],
(paren > *PL_reglastparen ? "(no)" : ""));
);
}
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++) {
#define regcpblow(cp) LEAVE_SCOPE(cp)
+#define TRYPAREN(paren, n, input) { \
+ if (paren) { \
+ if (n) { \
+ PL_regstartp[paren] = HOPc(input, -1) - PL_bostr; \
+ PL_regendp[paren] = input - PL_bostr; \
+ } \
+ else \
+ PL_regendp[paren] = -1; \
+ } \
+ if (regmatch(next)) \
+ sayYES; \
+ if (paren && n) \
+ PL_regendp[paren] = -1; \
+}
+
+
/*
* pregexec and friends
*/
/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-/* If SCREAM, then sv should be compatible with strpos and strend.
+/* If SCREAM, then SvPVX(sv) should be compatible with strpos and strend.
Otherwise, only SvCUR(sv) is used to get strbeg. */
/* 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
+ regtry() should be needed.
+
+ REx compiler's optimizer found 4 possible hints:
+ a) Anchored substring;
+ 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)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)
{
- I32 start_shift;
+ register I32 start_shift;
/* Should be nonnegative! */
- I32 end_shift;
- char *s;
+ register I32 end_shift;
+ register char *s;
+ register SV *check;
char *t;
I32 ml_anch;
+ char *tmp;
+ 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
DEBUG_r( if (!PL_colorset) reginitcolors() );
DEBUG_r(PerlIO_printf(Perl_debug_log,
- "%sGuessing start of match:%s `%s%.60s%s%s' against `%s%.*s%s%s'\n",
+ "%sGuessing start of match, 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 - strpos > 60 ? 60 : strend - strpos),
+ (int)(strend - strpos > 60 ? 60 : strend - strpos),
strpos, PL_colors[1],
(strend - strpos > 60 ? "..." : ""))
);
- if (prog->minlen > strend - strpos)
+ if (prog->minlen > strend - strpos) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n"));
goto fail;
-
- /* XXXX Move further down? */
- 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);
-
- if (prog->reganch & ROPT_ANCH) {
+ }
+ 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)
- && !PL_multiline ) );
+ && !PL_multiline ) ); /* Check after \n? */
if ((prog->check_offset_min == prog->check_offset_max) && !ml_anch) {
- /* Anchored... */
+ /* Substring at constant offset from beg-of-str... */
I32 slen;
if ( !(prog->reganch & ROPT_ANCH_GPOS) /* Checked by the caller */
- && (sv && (strpos + SvCUR(sv) != strend)) )
+ /* SvCUR is not set on references: SvRV and SvPVX overlap */
+ && sv && !SvROK(sv)
+ && (strpos + SvCUR(sv) != strend)) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
goto fail;
-
+ }
PL_regeol = strend; /* Used in HOP() */
- s = (char*)HOP((U8*)strpos, prog->check_offset_min);
- if (SvTAIL(prog->check_substr)) {
- slen = SvCUR(prog->check_substr); /* >= 1 */
+ s = HOPc(strpos, prog->check_offset_min);
+ if (SvTAIL(check)) {
+ slen = SvCUR(check); /* >= 1 */
- if ( strend - s > slen || strend - s < slen - 1 ) {
- s = Nullch;
- goto finish;
- }
- if ( strend - s == slen && strend[-1] != '\n') {
- s = Nullch;
- goto finish;
+ if ( strend - s > slen || strend - s < slen - 1
+ || (strend - s == slen && strend[-1] != '\n')) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
+ goto fail_finish;
}
/* 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))))
- s = Nullch;
+ && 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)))
- s = Nullch;
- else
- s = strpos;
- goto finish;
+ 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;
- if (!ml_anch && (s + prog->check_offset_max < strend - prog->minlen))
- end_shift += strend - s - prog->minlen - prog->check_offset_max;
+ start_shift = prog->check_offset_min; /* okay to underestimate on CC */
+ end_shift = prog->minlen - start_shift -
+ CHR_SVLEN(check) + (SvTAIL(check) != 0);
+ if (!ml_anch) {
+ I32 end = prog->check_offset_max + CHR_SVLEN(check)
+ - (SvTAIL(check) != 0);
+ I32 eshift = strend - s - end;
+
+ if (end_shift < eshift)
+ end_shift = eshift;
+ }
}
- else {
+ else { /* Can match at random position */
ml_anch = 0;
s = strpos;
+ start_shift = prog->check_offset_min; /* okay to underestimate on CC */
+ /* Should be nonnegative! */
+ end_shift = prog->minlen - start_shift -
+ CHR_SVLEN(check) + (SvTAIL(check) != 0);
}
- restart:
+#ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */
if (end_shift < 0)
- end_shift = 0; /* can happen when strend == strpos */
+ Perl_croak(aTHX_ "panic: end_shift");
+#endif
+
+ restart:
+ /* Find a possible match in the region s..strend by looking for
+ the "check" substring in the region corrected by start/end_shift. */
if (flags & REXEC_SCREAM) {
- SV *c = prog->check_substr;
char *strbeg = SvPVX(sv); /* XXXX Assume PV_force() on SCREAM! */
I32 p = -1; /* Internal iterator of scream. */
I32 *pp = data ? data->scream_pos : &p;
- if (PL_screamfirst[BmRARE(c)] >= 0
- || ( BmRARE(c) == '\n'
- && (BmPREVIOUS(c) == SvCUR(c) - 1)
- && SvTAIL(c) ))
- s = screaminstr(sv, prog->check_substr,
- start_shift + (strpos - strbeg), end_shift, pp, 0);
+ if (PL_screamfirst[BmRARE(check)] >= 0
+ || ( BmRARE(check) == '\n'
+ && (BmPREVIOUS(check) == SvCUR(check) - 1)
+ && SvTAIL(check) ))
+ s = screaminstr(sv, check,
+ start_shift + (s - strbeg), end_shift, pp, 0);
else
- s = Nullch;
+ goto fail_finish;
if (data)
*data->scream_olds = s;
}
else
s = fbm_instr((unsigned char*)s + start_shift,
(unsigned char*)strend - end_shift,
- prog->check_substr, PL_multiline ? FBMrf_MULTILINE : 0);
+ check, PL_multiline ? FBMrf_MULTILINE : 0);
/* Update the count-of-usability, remove useless subpatterns,
unshift s. */
- finish:
- if (!s) {
- ++BmUSEFUL(prog->check_substr); /* hooray */
- goto fail; /* not present */
+
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr `%s%.*s%s'%s%s",
+ (s ? "Found" : "Did not find"),
+ ((check == prog->anchored_substr) ? "anchored" : "floating"),
+ PL_colors[0],
+ (int)(SvCUR(check) - (SvTAIL(check)!=0)),
+ SvPVX(check),
+ PL_colors[1], (SvTAIL(check) ? "$" : ""),
+ (s ? " at offset " : "...\n") ) );
+
+ 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)) );
+
+ /* Got a candidate. Check MBOL anchoring, and the *other* substr.
+ Start with the other substr.
+ XXXX no SCREAM optimization yet - and a very coarse implementation
+ XXXX /ttx+/ results in anchored=`ttx', floating=`x'. floating will
+ *always* match. Probably should be marked during compile...
+ Probably it is right to do no SCREAM here...
+ */
+
+ if (prog->float_substr && prog->anchored_substr) {
+ /* Take into account the "other" substring. */
+ /* XXXX May be hopelessly wrong for UTF... */
+ if (!other_last)
+ other_last = strpos;
+ if (check == prog->float_substr) {
+ do_other_anchored:
+ {
+ char *last = s - start_shift, *last1, *last2;
+ char *s1 = s;
+
+ tmp = PL_bostr;
+ t = s - prog->check_offset_max;
+ if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
+ && (!(prog->reganch & ROPT_UTF8)
+ || (PL_bostr = strpos, /* Used in regcopmaybe() */
+ (t = reghopmaybe_c(s, -(prog->check_offset_max)))
+ && t > strpos)))
+ /* EMPTY */;
+ else
+ t = strpos;
+ t += prog->anchored_offset;
+ if (t < other_last) /* These positions already checked */
+ t = other_last;
+ PL_bostr = tmp;
+ last2 = last1 = strend - prog->minlen;
+ if (last < last1)
+ last1 = last;
+ /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
+ /* On end-of-str: see comment below. */
+ s = fbm_instr((unsigned char*)t,
+ (unsigned char*)last1 + prog->anchored_offset
+ + SvCUR(prog->anchored_substr)
+ - (SvTAIL(prog->anchored_substr)!=0),
+ prog->anchored_substr, PL_multiline ? FBMrf_MULTILINE : 0);
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%s anchored substr `%s%.*s%s'%s",
+ (s ? "Found" : "Contradicts"),
+ PL_colors[0],
+ (int)(SvCUR(prog->anchored_substr)
+ - (SvTAIL(prog->anchored_substr)!=0)),
+ SvPVX(prog->anchored_substr),
+ PL_colors[1], (SvTAIL(prog->anchored_substr) ? "$" : "")));
+ if (!s) {
+ if (last1 >= last2) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ ", giving up...\n"));
+ goto fail_finish;
+ }
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ ", trying floating at offset %ld...\n",
+ (long)(s1 + 1 - i_strpos)));
+ PL_regeol = strend; /* Used in HOP() */
+ other_last = last1 + prog->anchored_offset + 1;
+ s = HOPc(last, 1);
+ goto restart;
+ }
+ else {
+ DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
+ (long)(s - i_strpos)));
+ t = s - prog->anchored_offset;
+ other_last = s + 1;
+ s = s1;
+ if (t == strpos)
+ goto try_at_start;
+ goto try_at_offset;
+ }
+ }
+ }
+ else { /* Take into account the floating substring. */
+ char *last, *last1;
+ char *s1 = s;
+
+ t = s - start_shift;
+ last1 = last = strend - prog->minlen + prog->float_min_offset;
+ 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;
+ /* 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,
+ and end-of-str is not later than strend we are OK. */
+ s = fbm_instr((unsigned char*)s,
+ (unsigned char*)last + SvCUR(prog->float_substr)
+ - (SvTAIL(prog->float_substr)!=0),
+ prog->float_substr, PL_multiline ? FBMrf_MULTILINE : 0);
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr `%s%.*s%s'%s",
+ (s ? "Found" : "Contradicts"),
+ PL_colors[0],
+ (int)(SvCUR(prog->float_substr)
+ - (SvTAIL(prog->float_substr)!=0)),
+ SvPVX(prog->float_substr),
+ PL_colors[1], (SvTAIL(prog->float_substr) ? "$" : "")));
+ if (!s) {
+ if (last1 == last) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ ", giving up...\n"));
+ goto fail_finish;
+ }
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ ", trying anchored starting at offset %ld...\n",
+ (long)(s1 + 1 - i_strpos)));
+ 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;
+ s = s1;
+ if (t == strpos)
+ goto try_at_start;
+ goto try_at_offset;
+ }
+ }
}
- else if (s - strpos > prog->check_offset_max &&
- ((prog->reganch & ROPT_UTF8)
- ? ((t = reghopmaybe_c(s, -(prog->check_offset_max)))
- && t >= strpos)
- : (t = s - prog->check_offset_max) != 0) ) {
+
+ t = s - prog->check_offset_max;
+ tmp = PL_bostr;
+ if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
+ && (!(prog->reganch & ROPT_UTF8)
+ || (PL_bostr = strpos, /* Used in regcopmaybe() */
+ ((t = reghopmaybe_c(s, -(prog->check_offset_max)))
+ && t > strpos)))) {
+ PL_bostr = tmp;
+ /* Fixed substring is found far enough so that the match
+ cannot start at strpos. */
+ try_at_offset:
if (ml_anch && t[-1] != '\n') {
+ /* Eventually fbm_*() should handle this, but often
+ anchored_offset is not 0, so this check will not be wasted. */
+ /* XXXX In the code below we prefer to look for "^" even in
+ presence of anchored substrings. And we search even
+ beyond the found float position. These pessimizations
+ are historical artefacts only. */
find_anchor:
- while (t < strend - end_shift - prog->minlen) {
+ while (t < strend - prog->minlen) {
if (*t == '\n') {
- if (t < s - prog->check_offset_min) {
+ if (t < check_at - prog->check_offset_min) {
+ if (prog->anchored_substr) {
+ /* Since we moved from the found position,
+ we definitely contradict the found anchored
+ substr. Due to the above check we do not
+ contradict "check" substr.
+ Thus we can arrive here only if check substr
+ is float. Redo checking for "other"=="fixed".
+ */
+ strpos = t + 1;
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
+ PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
+ goto do_other_anchored;
+ }
+ /* We don't contradict the found floating substring. */
+ /* XXXX Why not check for STCLASS? */
s = t + 1;
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
+ PL_colors[0],PL_colors[1], (long)(s - i_strpos)));
goto set_useful;
}
- s = t + 1;
+ /* Position contradicts check-string */
+ /* XXXX probably better to look for check-string
+ than for "\n", so one should lower the limit for t? */
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
+ PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos)));
+ other_last = strpos = s = t + 1;
goto restart;
}
t++;
}
- s = Nullch;
- goto finish;
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
+ PL_colors[0],PL_colors[1]));
+ goto fail_finish;
+ }
+ else {
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
+ PL_colors[0],PL_colors[1]));
}
s = t;
set_useful:
- ++BmUSEFUL(prog->check_substr); /* hooray/2 */
+ ++BmUSEFUL(prog->check_substr); /* hooray/5 */
}
else {
- if (ml_anch && sv
- && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n') {
+ PL_bostr = tmp;
+ /* The found string does not prohibit matching at strpos,
+ - no optimization of calling REx engine can be performed,
+ unless it was an MBOL and we are not after MBOL,
+ or a future STCLASS check will fail this. */
+ try_at_start:
+ /* Even in this situation we may use MBOL flag if strpos is offset
+ wrt the start of the string. */
+ if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
+ && (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;
}
- if (!(prog->reganch & ROPT_NAUGHTY)
+ DEBUG_r( if (ml_anch)
+ PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
+ (long)(strpos - i_strpos), PL_colors[0],PL_colors[1]);
+ );
+ 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 */
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
SvREFCNT_dec(prog->check_substr);
prog->check_substr = Nullsv; /* disable */
prog->float_substr = Nullsv; /* clear */
+ check = Nullsv; /* abort */
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;
}
- DEBUG_r(PerlIO_printf(Perl_debug_log, "%sFound%s at offset %ld\n",
- PL_colors[4],PL_colors[5], (long)(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;
+ }
+ if (!check)
+ goto giveup;
+ DEBUG_r( PerlIO_printf(Perl_debug_log,
+ "Looking for %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;
+ if (!check)
+ goto giveup;
+ DEBUG_r( PerlIO_printf(Perl_debug_log,
+ "Looking for 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;
+ if (!check)
+ goto giveup;
+ DEBUG_r( PerlIO_printf(Perl_debug_log,
+ "Looking for /%s^%s/m starting at offset %ld...\n",
+ PL_colors[0],PL_colors[1], (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") );
+ }
+ giveup:
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
+ PL_colors[4], (check ? "Guessed" : "Giving up"),
+ PL_colors[5], (long)(s - i_strpos)) );
return s;
+
+ fail_finish: /* Substring not found */
+ if (prog->check_substr) /* could be removed already */
+ BmUSEFUL(prog->check_substr) += 5; /* hooray */
fail:
- DEBUG_r(PerlIO_printf(Perl_debug_log, "%sNot found...%s\n",
+ 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 */
- CURCUR cc;
- 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);
-
- cc.cur = 0;
- cc.oldcc = 0;
- PL_regcc = &cc;
-
- 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;
-
- 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) {
- MAGIC *mg;
-
- if (!(flags & REXEC_IGNOREPOS) && sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv) && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0)
- PL_reg_ganch = strbeg + mg->mg_len;
- else
- PL_reg_ganch = startpos;
- if (prog->reganch & ROPT_ANCH_GPOS) {
- if (s > PL_reg_ganch)
- goto phooey;
- s = PL_reg_ganch;
- }
- }
-
- 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%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) {
- while (1) {
- if (regtry(prog, s))
- goto got_it;
- 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;
- }
+ I32 doevery = (prog->reganch & ROPT_SKIP) == 0;
+ char *m;
+ STRLEN ln;
+ unsigned int c1;
+ unsigned int c2;
+ char *e;
+ register I32 tmp = 1; /* Scratch variable? */
- /* 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) {
+ /* We know what class it must start with. */
+ switch (OP(c)) {
+ case ANYOFUTF8:
while (s < strend) {
- if (*s == ch) {
- if (regtry(prog, s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
+ if (REGINCLASSUTF8(c, (U8*)s)) {
+ if (tmp && (norun || regtry(prog, s)))
+ goto got_it;
+ else
+ tmp = doevery;
}
+ else
+ tmp = 1;
s += UTF8SKIP(s);
}
- }
- else {
+ break;
+ case ANYOF:
while (s < strend) {
- if (*s == ch) {
- if (regtry(prog, s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
+ if (REGINCLASS(c, *(U8*)s)) {
+ if (tmp && (norun || 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;
- 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))
+ break;
+ case EXACTF:
+ m = STRING(c);
+ ln = STR_LEN(c);
+ c1 = *(U8*)m;
+ c2 = PL_fold[c1];
+ goto do_exactf;
+ case EXACTFL:
+ m = STRING(c);
+ ln = STR_LEN(c);
+ 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 ( *(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++;
}
- }
- }
- goto phooey;
- }
- else if (c = prog->regstclass) {
- I32 doevery = (prog->reganch & ROPT_SKIP) == 0;
- char *cc;
-
- 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:
- cc = (char *) OPERAND(c);
- while (s < strend) {
- if (REGINCLASSUTF8(c, (U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += UTF8SKIP(s);
- }
- break;
- case ANYOF:
- cc = (char *) OPERAND(c);
- while (s < strend) {
- if (REGINCLASS(cc, *s)) {
- if (tmp && regtry(prog, s))
+ } else {
+ while (s <= e) {
+ 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;
- else
- tmp = doevery;
+ s++;
}
- else
- tmp = 1;
- s++;
}
break;
case BOUNDL:
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;
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;
s += UTF8SKIP(s);
}
break;
- case ALNUMC:
- while (s < strend) {
- if (isALNUMC(*s)) {
- if (tmp && regtry(prog, s))
+ 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 ALNUMCUTF8:
+ }
+ 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];
+#ifdef DEBUGGING
+ int did_match = 0;
+#endif
+
+ if (UTF) {
while (s < strend) {
- if (swash_fetch(PL_utf8_alnumc, (U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
+ if (*s == ch) {
+ DEBUG_r( did_match = 1 );
+ 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 ALNUMCL:
- PL_reg_flags |= RF_tainted;
+ }
+ else {
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++;
- }
- break;
- case NALNUMCUTF8:
- 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 NALNUMCL:
- 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 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;
- s += UTF8SKIP(s);
- }
- break;
- case ASCII:
- while (s < strend) {
- if (isASCII(*(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
+ if (*s == ch) {
+ DEBUG_r( did_match = 1 );
+ if (regtry(prog, s)) goto got_it;
+ s++;
+ while (s < strend && *s == ch)
+ s++;
}
- 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++;
+ }
+ DEBUG_r(did_match ||
+ PerlIO_printf(Perl_debug_log,
+ "Did not find anchored character...\n"));
+ }
+ /*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 */
+#ifdef DEBUGGING
+ int did_match = 0;
+#endif
+
+ 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))) ) {
+ DEBUG_r( did_match = 1 );
+ if (HOPc(s, -back_max) > last1) {
+ last1 = HOPc(s, -back_min);
+ s = HOPc(s, -back_max);
}
- break;
- case CNTRL:
- while (s < strend) {
- if (isCNTRL(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
+ else {
+ char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
+
+ last1 = HOPc(s, -back_min);
+ s = t;
}
- break;
- case CNTRLUTF8:
- while (s < strend) {
- if (swash_fetch(PL_utf8_cntrl,(U8*)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 += UTF8SKIP(s);
}
- break;
- case CNTRLL:
- PL_reg_flags |= RF_tainted;
- while (s < strend) {
- if (isCNTRL_LC(*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++;
}
- 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);
+ }
+ DEBUG_r(did_match ||
+ PerlIO_printf(Perl_debug_log, "Did not find %s substr `%s%.*s%s'%s...\n",
+ ((must == prog->anchored_substr)
+ ? "anchored" : "floating"),
+ PL_colors[0],
+ (int)(SvCUR(must) - (SvTAIL(must)!=0)),
+ SvPVX(must),
+ PL_colors[1], (SvTAIL(must) ? "$" : "")));
+ goto phooey;
+ }
+ else if ((c = prog->regstclass)) {
+ if (minlen && PL_regkind[(U8)OP(prog->regstclass)] != EXACT)
+ /* don't bother with what can't match */
+ strend = HOPc(strend, -(minlen - 1));
+ if (find_byclass(prog, c, s, strend, startpos, 0))
+ goto got_it;
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass...\n"));
+ }
+ else {
+ dontbother = 0;
+ if (prog->float_substr != Nullsv) { /* Trim the end. */
+ char *last;
+
+ if (flags & REXEC_SCREAM) {
+ last = screaminstr(sv, prog->float_substr, s - strbeg,
+ end_shift, &scream_pos, 1); /* last one */
+ if (!last)
+ last = scream_olds; /* Only one occurence. */
}
- break;
- case NCNTRL:
- while (s < strend) {
- if (!isCNTRL(*s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
+ else {
+ STRLEN len;
+ char *little = SvPV(prog->float_substr, len);
+
+ if (SvTAIL(prog->float_substr)) {
+ if (memEQ(strend - len + 1, little, len - 1))
+ last = strend - len + 1;
+ else if (!PL_multiline)
+ last = memEQ(strend - len, little, len)
+ ? strend - len : Nullch;
else
- tmp = doevery;
- }
- else
- tmp = 1;
- s++;
- }
- break;
- case NCNTRLUTF8:
- while (s < strend) {
- if (!swash_fetch(PL_utf8_cntrl,(U8*)s)) {
- if (tmp && regtry(prog, s))
- goto got_it;
+ goto find_last;
+ } else {
+ find_last:
+ if (len)
+ last = rninstr(s, strend, little, little + len);
else
- tmp = doevery;
+ last = strend; /* matching `$' */
}
- else
- tmp = 1;
- s += 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++;
+ if (last == NULL) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ "%sCan't trim the tail, match fails (should not happen)%s\n",
+ PL_colors[4],PL_colors[5]));
+ goto phooey; /* Should not happen! */
}
- 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;
+ 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);
};
}
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++);
+ /* Failure. */
+ goto phooey;
- 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;
- }
+got_it:
+ RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted);
- /* 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 (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:
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
+ PL_colors[4],PL_colors[5]));
+ 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 %"IVdf"\n",
+ (IV)(PL_stack_sp - PL_stack_base));
+ ));
+ 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. */
+ /* SAVEI8(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 (((!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 (!(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;
}
- 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);
+ PL_reg_magic = mg;
+ PL_reg_oldpos = mg->mg_len;
+ SAVEDESTRUCTOR_X(restore_pos, 0);
+ }
+ if (!PL_reg_curpm)
+ Newz(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 sayYES_FINAL goto yes_final
+# define sayYES_LOUD goto yes_loud
+# define sayNO_FINAL goto no_final
+# define sayNO_SILENT goto do_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 sayYES_FINAL return 1
+# define sayYES_LOUD return 1
+# define sayNO_FINAL return 0
+# define sayNO_SILENT 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,
+ "%4"IVdf" <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3"IVdf":%*s%s\n",
+ (IV)(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,
+ "",
+ (IV)(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 (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);
+ sayNO;
+ case MBOL:
+ if (locinput == PL_bostr
+ ? PL_regprev == '\n'
+ : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
+ {
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);
+ sayNO;
+ case SBOL:
+ if (locinput == PL_bostr)
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);
+ sayNO;
+ case GPOS:
+ if (locinput == PL_reg_ganch)
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;
+ 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 NALNUMCLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUMCUTF8:
- if (!nextchr && locinput >= PL_regeol)
+ case SEOL:
+ seol:
+ if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_alnumc,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (isALNUMC(nextchr))
+ if (PL_regeol - locinput > 1)
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)))
+ case EOS:
+ if (PL_regeol != locinput)
sayNO;
- nextchr = UCHARAT(++locinput);
break;
- case ALPHALUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALPHAUTF8:
- if (!nextchr)
- sayNO;
+ case SANYUTF8:
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);
- 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))
+ if (locinput > PL_regeol)
sayNO;
- locinput += PL_utf8skip[nextchr];
nextchr = UCHARAT(locinput);
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:
+ case SANY:
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;
+ case ANYUTF8:
if (nextchr & 0x80) {
- if (!(OP(scan) == CNTRLUTF8
- ? swash_fetch(PL_utf8_cntrl, (U8*)locinput)
- : isCNTRL_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
locinput += PL_utf8skip[nextchr];
+ if (locinput > PL_regeol)
+ sayNO;
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == CNTRLUTF8
- ? isCNTRL(nextchr) : isCNTRL_LC(nextchr)))
+ if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
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))
+ case REG_ANY:
+ 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)
- sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_cntrl,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (isCNTRL(nextchr))
+ case EXACT:
+ s = STRING(scan);
+ ln = STR_LEN(scan);
+ /* Inline the first character, for speed. */
+ if (UCHARAT(s) != nextchr)
sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case GRAPHL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case GRAPH:
- if (!nextchr)
+ if (PL_regeol - locinput < ln)
sayNO;
- if (!(OP(scan) == GRAPH
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
+ if (ln > 1 && memNE(s, locinput, ln))
sayNO;
- nextchr = UCHARAT(++locinput);
+ locinput += ln;
+ nextchr = UCHARAT(locinput);
break;
- case GRAPHLUTF8:
+ case EXACTFL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case GRAPHUTF8:
- if (!nextchr)
- sayNO;
- if (nextchr & 0x80) {
- if (!(OP(scan) == GRAPHUTF8
- ? swash_fetch(PL_utf8_graph, (U8*)locinput)
- : isGRAPH_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) == GRAPHUTF8
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
+
+ /* Inline the first character, for speed. */
+ if (UCHARAT(s) != nextchr &&
+ UCHARAT(s) != ((OP(scan) == EXACTF)
+ ? PL_fold : PL_fold_locale)[nextchr])
sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NGRAPHL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NGRAPH:
- if (!nextchr)
+ if (PL_regeol - locinput < ln)
sayNO;
- if (OP(scan) == GRAPH
- ? isGRAPH(nextchr) : isGRAPH_LC(nextchr))
+ if (ln > 1 && (OP(scan) == EXACTF
+ ? ibcmp(s, locinput, ln)
+ : ibcmp_locale(s, locinput, ln)))
sayNO;
- nextchr = UCHARAT(++locinput);
+ locinput += ln;
+ nextchr = UCHARAT(locinput);
break;
- case NGRAPHLUTF8:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NGRAPHUTF8:
- if (!nextchr && locinput >= PL_regeol)
+ case ANYOFUTF8:
+ if (!REGINCLASSUTF8(scan, (U8*)locinput))
sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_graph,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
+ if (locinput >= PL_regeol)
+ sayNO;
+ locinput += PL_utf8skip[nextchr];
+ nextchr = UCHARAT(locinput);
+ break;
+ case ANYOF:
+ if (nextchr < 0)
nextchr = UCHARAT(locinput);
- break;
- }
- if (isGRAPH(nextchr))
+ if (!REGINCLASS(scan, nextchr))
+ sayNO;
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case LOWERL:
+ case ALNUML:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case LOWER:
+ 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 LOWERLUTF8:
+ case ALNUMLUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case LOWERUTF8:
+ case ALNUMUTF8:
if (!nextchr)
sayNO;
if (nextchr & 0x80) {
- if (!(OP(scan) == LOWERUTF8
- ? swash_fetch(PL_utf8_lower, (U8*)locinput)
- : isLOWER_LC_utf8((U8*)locinput)))
+ if (!(OP(scan) == ALNUMUTF8
+ ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
+ : isALNUM_LC_utf8((U8*)locinput)))
{
sayNO;
}
nextchr = UCHARAT(locinput);
break;
}
- if (!(OP(scan) == LOWERUTF8
- ? isLOWER(nextchr) : isLOWER_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NLOWERL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NLOWER:
- if (!nextchr)
- sayNO;
- if (OP(scan) == LOWER
- ? isLOWER(nextchr) : isLOWER_LC(nextchr))
+ if (!(OP(scan) == ALNUMUTF8
+ ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NLOWERLUTF8:
+ case NALNUML:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NLOWERUTF8:
+ case NALNUM:
if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (nextchr & 0x80) {
- if (swash_fetch(PL_utf8_lower,(U8*)locinput))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (isLOWER(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case PRINTL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case PRINT:
- if (!nextchr)
- 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:
+ case SPACE:
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 PUNCTLUTF8:
+ case SPACELUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case PUNCTUTF8:
+ case SPACEUTF8:
if (!nextchr)
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:
- if (!nextchr)
+ case NSPACE:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (OP(scan) == PUNCT
- ? isPUNCT(nextchr) : isPUNCT_LC(nextchr))
+ if (OP(scan) == NSPACE
+ ? isSPACE(nextchr) : isSPACE_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NPUNCTLUTF8:
+ case NSPACELUTF8:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NPUNCTUTF8:
+ case NSPACEUTF8:
if (!nextchr && locinput >= PL_regeol)
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:
+ case DIGIT:
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 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) == DIGITUTF8
+ ? 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 (!(OP(scan) == DIGITUTF8
+ ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
sayNO;
nextchr = UCHARAT(++locinput);
break;
- case NUPPERL:
+ case NDIGITL:
PL_reg_flags |= RF_tainted;
/* FALL THROUGH */
- case NUPPER:
- if (!nextchr)
+ case NDIGIT:
+ if (!nextchr && locinput >= PL_regeol)
sayNO;
- if (OP(scan) == UPPER
- ? isUPPER(nextchr) : isUPPER_LC(nextchr))
+ if (OP(scan) == NDIGIT
+ ? 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 (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 (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 (OP(scan) == NDIGITUTF8
+ ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
sayNO;
nextchr = UCHARAT(++locinput);
break;
case REFF:
n = ARG(scan); /* which paren pair */
ln = PL_regstartp[n];
+ PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
if (*PL_reglastparen < n || ln == -1)
sayNO; /* Do not match unless seen CLOSEn. */
if (ln == PL_regendp[n])
n = ARG(scan);
PL_op = (OP_4tree*)PL_regdata->data[n];
- DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%x\n", PL_op) );
+ DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]);
PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr;
regexp *re;
MAGIC *mg = Null(MAGIC*);
re_cc_state state;
- CURCUR cctmp;
CHECKPOINT cp, lastcp;
if(SvROK(ret) || SvRMAGICAL(ret)) {
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)))
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_reglastparen = 0;
PL_reg_call_cc = &state;
PL_reginput = locinput;
+
+ /* XXXX This is too dramatic a measure... */
+ 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;
}
- DEBUG_r(
- PerlIO_printf(Perl_debug_log,
- "%*s failed...\n",
- REPORT_CODE_OFF+PL_regindent*2, "")
- );
ReREFCNT_dec(re);
REGCP_UNWIND;
regcppop();
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;
+
sayNO;
}
sw = SvTRUE(ret);
sw = (*PL_reglastparen >= n && PL_regendp[n] != -1);
break;
case IFTHEN:
+ PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
if (sw)
next = NEXTOPER(NEXTOPER(scan));
else {
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;
/*
* This is really hard to understand, because after we match
* what we're trying to match, we must make sure the rest of
- * the RE is going to match for sure, and to do that we have
+ * the REx is going to match for sure, and to do that we have
* to go back UP the parse tree by recursing ever deeper. And
* if it fails, we have to reset our parent's current state
* that we can try again after backing off.
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",
);
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;
sayNO;
}
sayYES;
cc->cur = n - 1;
cc->lastloc = lastloc;
+ sayNO;
+ }
+
+ if (scan->flags) {
+ /* Check whether we already were at this position.
+ Postpone detection until we know the match is not
+ *that* much linear. */
+ if (!PL_reg_maxiter) {
+ PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
+ PL_reg_leftiter = PL_reg_maxiter;
+ }
+ if (PL_reg_leftiter-- == 0) {
+ I32 size = (PL_reg_maxiter + 7)/8;
+ if (PL_reg_poscache) {
+ if (PL_reg_poscache_size < size) {
+ Renew(PL_reg_poscache, size, char);
+ PL_reg_poscache_size = size;
+ }
+ Zero(PL_reg_poscache, size, char);
+ }
+ else {
+ PL_reg_poscache_size = size;
+ Newz(29, PL_reg_poscache, size, char);
+ }
+ DEBUG_r(
+ PerlIO_printf(Perl_debug_log,
+ "%sDetected a super-linear match, switching on caching%s...\n",
+ PL_colors[4], PL_colors[5])
+ );
+ }
+ if (PL_reg_leftiter < 0) {
+ I32 o = locinput - PL_bostr, b;
+
+ o = (scan->flags & 0xf) - 1 + o * (scan->flags>>4);
+ b = o % 8;
+ o /= 8;
+ if (PL_reg_poscache[o] & (1<<b)) {
DEBUG_r(
PerlIO_printf(Perl_debug_log,
- "%*s failed...\n",
+ "%*s already tried at this position...\n",
REPORT_CODE_OFF+PL_regindent*2, "")
);
- sayNO;
+ sayNO_SILENT;
+ }
+ PL_reg_poscache[o] |= (1<<b);
+ }
}
/* Prefer next over scan for minimal matching. */
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? */
- 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);
}
regcpblow(cp);
sayYES;
}
- DEBUG_r(
- PerlIO_printf(Perl_debug_log,
- "%*s failed...\n",
- REPORT_CODE_OFF+PL_regindent*2, "")
- );
REGCP_UNWIND;
regcppop();
cc->cur = n - 1;
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);
}
/* 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;
*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;
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)
locinput = PL_reginput;
DEBUG_r(
PerlIO_printf(Perl_debug_log,
- "%*s matched %ld times, len=%ld...\n",
- REPORT_CODE_OFF+PL_regindent*2, "", n, l)
+ "%*s matched %"IVdf" times, len=%"IVdf"...\n",
+ (int)(REPORT_CODE_OFF+PL_regindent*2), "",
+ (IV) n, (IV)l)
);
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)
{
DEBUG_r(
PerlIO_printf(Perl_debug_log,
- "%*s trying tail with n=%ld...\n",
- REPORT_CODE_OFF+PL_regindent*2, "", n)
+ "%*s trying tail with n=%"IVdf"...\n",
+ (int)(REPORT_CODE_OFF+PL_regindent*2), "", (IV)n)
);
if (paren) {
if (n) {
* 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)
sayNO;
}
/* PL_reginput == locinput now */
- if (paren) {
- if (ln) {
- PL_regstartp[paren] = HOPc(locinput, -1) - PL_bostr;
- PL_regendp[paren] = locinput - PL_bostr;
- }
- else
- PL_regendp[paren] = -1;
- }
- if (regmatch(next))
- sayYES;
+ TRYPAREN(paren, ln, locinput);
PL_reginput = locinput; /* Could be reset... */
REGCP_UNWIND;
/* Couldn't or didn't -- move forward. */
UCHARAT(PL_reginput) == c1 ||
UCHARAT(PL_reginput) == c2)
{
- if (paren) {
- if (n) {
- PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr;
- PL_regendp[paren] = PL_reginput - PL_bostr;
- }
- else
- PL_regendp[paren] = -1;
- }
- if (regmatch(next))
- sayYES;
+ TRYPAREN(paren, n, PL_reginput);
REGCP_UNWIND;
}
/* Couldn't or didn't -- move forward. */
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) {
UCHARAT(PL_reginput) == c1 ||
UCHARAT(PL_reginput) == c2)
{
- if (paren && n) {
- if (n) {
- PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr;
- PL_regendp[paren] = PL_reginput - PL_bostr;
- }
- else
- PL_regendp[paren] = -1;
- }
- if (regmatch(next))
- sayYES;
+ TRYPAREN(paren, n, PL_reginput);
REGCP_UNWIND;
}
/* Couldn't or didn't -- back up. */
UCHARAT(PL_reginput) == c1 ||
UCHARAT(PL_reginput) == c2)
{
- if (regmatch(next))
- sayYES;
+ TRYPAREN(paren, n, PL_reginput);
REGCP_UNWIND;
}
/* Couldn't or didn't -- back up. */
"%*s continuation failed...\n",
REPORT_CODE_OFF+PL_regindent*2, "")
);
- sayNO;
+ sayNO_SILENT;
+ }
+ if (locinput < PL_regtill) {
+ DEBUG_r(PerlIO_printf(Perl_debug_log,
+ "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
+ PL_colors[4],
+ (long)(locinput - PL_reg_starttry),
+ (long)(PL_regtill - PL_reg_starttry),
+ PL_colors[5]));
+ sayNO_FINAL; /* Cannot match: too short. */
}
- if (locinput < PL_regtill)
- sayNO; /* Cannot match: too short. */
- /* Fall through */
+ PL_reginput = locinput; /* put where regtry can find it */
+ sayYES_FINAL; /* Success! */
case SUCCEED:
PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
+ sayYES_LOUD; /* Success! */
case SUSPEND:
n = 1;
PL_reginput = locinput;
next = NULL;
break;
default:
- PerlIO_printf(PerlIO_stderr(), "%lx %d\n",
- (unsigned long)scan, OP(scan));
+ PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
+ PTR2UV(scan), OP(scan));
Perl_croak(aTHX_ "regexp memory corruption");
}
scan = next;
/*NOTREACHED*/
sayNO;
+yes_loud:
+ DEBUG_r(
+ PerlIO_printf(Perl_debug_log,
+ "%*s %scould match...%s\n",
+ REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5])
+ );
+ goto yes;
+yes_final:
+ DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
+ PL_colors[4],PL_colors[5]));
yes:
#ifdef DEBUGGING
PL_regindent--;
return 1;
no:
+ DEBUG_r(
+ PerlIO_printf(Perl_debug_log,
+ "%*s %sfailed...%s\n",
+ REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5])
+ );
+ goto do_no;
+no_final:
+do_no:
#ifdef DEBUGGING
PL_regindent--;
#endif
{
dTHR;
register char *scan;
- register char *opnd;
register I32 c;
register char *loceol = PL_regeol;
register I32 hardcount = 0;
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:
- while (scan < loceol && REGINCLASS(opnd, *scan))
+ while (scan < loceol && REGINCLASS(p, *scan))
scan++;
break;
case ALNUM:
regprop(prop, p);
PerlIO_printf(Perl_debug_log,
- "%*s %s can match %ld times out of %ld...\n",
- REPORT_CODE_OFF+1, "", SvPVX(prop),c,max);
+ "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
+ REPORT_CODE_OFF+1, "", SvPVX(prop),(IV)c,(IV)max);
});
return(c);
*/
STATIC bool
-S_reginclass(pTHX_ register char *p, register I32 c)
+S_reginclass(pTHX_ register regnode *p, register I32 c)
{
dTHR;
char flags = ANYOF_FLAGS(p);
(ANYOF_CLASS_TEST(p, ANYOF_UPPER) && isUPPER_LC(c)) ||
(ANYOF_CLASS_TEST(p, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
(ANYOF_CLASS_TEST(p, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(p, ANYOF_NXDIGIT) && !isXDIGIT(c))
+ (ANYOF_CLASS_TEST(p, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
+ (ANYOF_CLASS_TEST(p, ANYOF_PSXSPC) && isPSXSPC(c)) ||
+ (ANYOF_CLASS_TEST(p, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
+ (ANYOF_CLASS_TEST(p, ANYOF_BLANK) && isBLANK(c)) ||
+ (ANYOF_CLASS_TEST(p, ANYOF_NBLANK) && !isBLANK(c))
) /* How's that for a conditional? */
{
match = TRUE;
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));
}
#ifdef PERL_OBJECT
-#define NO_XSLOCKS
#include "XSUB.h"
#endif
PL_curpm = PL_reg_oldcurpm;
}
}
-