#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
*/
find_anchor:
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) {
- /* We definitely contradict the found anchored
+ /* 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
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;
}
- DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting at offset %ld...\n",
+ /* 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)));
- strpos = s = t + 1;
+ other_last = strpos = s = t + 1;
goto restart;
}
t++;
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/5 */
}
else {
PL_bostr = tmp;
- /* The found string does not prohibit matching at beg-of-str
+ /* 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. */
+ 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. */
goto find_anchor;
}
DEBUG_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Does not contradict /%s^%s/m...\n",
- PL_colors[0],PL_colors[1]);
+ 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 == 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
"Could not match STCLASS...\n") );
goto fail;
}
+ if (!check)
+ goto giveup;
DEBUG_r( PerlIO_printf(Perl_debug_log,
- "Trying %s substr starting at offset %ld...\n",
+ "Looking for %s substr starting at offset %ld...\n",
what, (long)(s + start_shift - i_strpos)) );
goto restart;
}
goto retry_floating_check;
/* Recheck anchored substring, but not floating... */
s = check_at;
+ if (!check)
+ goto giveup;
DEBUG_r( PerlIO_printf(Perl_debug_log,
- "Trying anchored substr starting at offset %ld...\n",
+ "Looking for anchored substr starting at offset %ld...\n",
(long)(other_last - i_strpos)) );
goto do_other_anchored;
}
current position only: */
if (ml_anch) {
s = t = t + 1;
+ if (!check)
+ goto giveup;
DEBUG_r( PerlIO_printf(Perl_debug_log,
- "Trying /^/m starting at offset %ld...\n",
- (long)(t - i_strpos)) );
+ "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 */
PerlIO_printf(Perl_debug_log,
"Does not contradict STCLASS...\n") );
}
- DEBUG_r(PerlIO_printf(Perl_debug_log, "%sGuessed:%s match at offset %ld\n",
- PL_colors[4], PL_colors[5], (long)(s - i_strpos)) );
+ 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 */
}
sayNO;
case SBOL:
- if (locinput == PL_regbol && PL_regprev == '\n')
+ if (locinput == PL_bostr)
break;
sayNO;
case GPOS:
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. */
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. */