regexec.c: Add parameter to static fcn

This parameter will be used to limit how far in the input string to
apply the function to.  But currently, it is set to the end of the
string, so there should be no change from previous behavior.

1 files changed, 75 insertions, 74 deletions

diff --git a/regexec.c b/regexec.c
index 2d603fd3bb..223eaf2707 100644
--- a/regexec.c
+++ b/regexec.c
@@ -8313,7 +8313,7 @@ NULL
             if (EVAL_CLOSE_PAREN_IS_TRUE(cur_eval,(U32)ST.paren))
             {
                 char *li = locinput;
-                if (!regrepeat(rex, &li, scan, reginfo, 1))
+                if (!regrepeat(rex, &li, scan, reginfo->strend, reginfo, 1))
 		    sayNO;
                 SET_locinput(li);
                 goto fake_end;
@@ -8369,7 +8369,7 @@ NULL
                 char *li = locinput;
 		minmod = 0;
 		if (ST.min &&
-                        regrepeat(rex, &li, ST.A, reginfo, ST.min)
+                        regrepeat(rex, &li, ST.A, reginfo->strend, reginfo, ST.min)
                             < ST.min)
 		    sayNO;
                 SET_locinput(li);
@@ -8406,7 +8406,7 @@ NULL
                 /* avoid taking address of locinput, so it can remain
                  * a register var */
                 char *li = locinput;
-                ST.count = regrepeat(rex, &li, ST.A, reginfo, ST.max);
+                ST.count = regrepeat(rex, &li, ST.A, reginfo->strend, reginfo, ST.max);
 		if (ST.count < ST.min)
 		    sayNO;
                 SET_locinput(li);
@@ -8439,7 +8439,7 @@ NULL
             if (ST.c1 == CHRTEST_VOID) {
                 /* failed -- move forward one */
                 char *li = locinput;
-                if (!regrepeat(rex, &li, ST.A, reginfo, 1)) {
+                if (!regrepeat(rex, &li, ST.A, reginfo->strend, reginfo, 1)) {
                     sayNO;
                 }
                 locinput = li;
@@ -8536,7 +8536,7 @@ NULL
                      * locinput matches */
                     char *li = ST.oldloc;
 		    ST.count += n;
-                    if (regrepeat(rex, &li, ST.A, reginfo, n) < n)
+                    if (regrepeat(rex, &li, ST.A, reginfo->strend, reginfo, n) < n)
 			sayNO;
                     assert(n == REG_INFTY || locinput == li);
 		}
@@ -9068,18 +9068,20 @@ NULL
  *             to point to the byte following the highest successful
  *             match.
  * p         - the regnode to be repeatedly matched against.
- * reginfo   - struct holding match state, such as strend
+ * loceol    - pointer to the end position beyond which we aren't supposed to
+ *             look.
+ * reginfo   - struct holding match state, such as utf8_target
  * max       - maximum number of things to match.
  * depth     - (for debugging) backtracking depth.
  */
 STATIC I32
 S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
-            regmatch_info *const reginfo, I32 max _pDEPTH)
+            char * loceol, regmatch_info *const reginfo, I32 max _pDEPTH)
 {
     dVAR;
     char *scan;     /* Pointer to current position in target string */
     I32 c;
-    char *loceol = reginfo->strend;   /* local version */
+    char *this_eol = loceol;   /* potentially adjusted version. */
     I32 hardcount = 0;  /* How many matches so far */
     bool utf8_target = reginfo->is_utf8_target;
     unsigned int to_complement = 0;  /* Invert the result? */
@@ -9097,15 +9099,15 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
     if (max == REG_INFTY)   /* This is a special marker to go to the platform's
                                max */
 	max = I32_MAX;
-    else if (! utf8_target && loceol - scan > max)
-	loceol = scan + max;
+    else if (! utf8_target && this_eol - scan > max)
+	this_eol = scan + max;
 
-    /* Here, for the case of a non-UTF-8 target we have adjusted <loceol> down
+    /* Here, for the case of a non-UTF-8 target we have adjusted <this_eol> down
      * to the maximum of how far we should go in it (leaving it set to the real
      * end, if the maximum permissible would take us beyond that).  This allows
-     * us to make the loop exit condition that we haven't gone past <loceol> to
+     * us to make the loop exit condition that we haven't gone past <this_eol> to
      * also mean that we haven't exceeded the max permissible count, saving a
-     * test each time through the loop.  But it assumes that the OP matches a
+     * test each time through the loops.  But it assumes that the OP matches a
      * single byte, which is true for most of the OPs below when applied to a
      * non-UTF-8 target.  Those relatively few OPs that don't have this
      * characteristic will have to compensate.
@@ -9113,39 +9115,39 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
      * There is no adjustment for UTF-8 targets, as the number of bytes per
      * character varies.  OPs will have to test both that the count is less
      * than the max permissible (using <hardcount> to keep track), and that we
-     * are still within the bounds of the string (using <loceol>.  A few OPs
+     * are still within the bounds of the string (using <this_eol>.  A few OPs
      * match a single byte no matter what the encoding.  They can omit the max
      * test if, for the UTF-8 case, they do the adjustment that was skipped
      * above.
      *
      * Thus, the code above sets things up for the common case; and exceptional
      * cases need extra work; the common case is to make sure <scan> doesn't
-     * go past <loceol>, and for UTF-8 to also use <hardcount> to make sure the
+     * go past <this_eol>, and for UTF-8 to also use <hardcount> to make sure the
      * count doesn't exceed the maximum permissible */
 
     switch (OP(p)) {
     case REG_ANY:
 	if (utf8_target) {
-	    while (scan < loceol && hardcount < max && *scan != '\n') {
+	    while (scan < this_eol && hardcount < max && *scan != '\n') {
 		scan += UTF8SKIP(scan);
 		hardcount++;
 	    }
 	} else {
-            scan = (char *) memchr(scan, '\n', loceol - scan);
+            scan = (char *) memchr(scan, '\n', this_eol - scan);
             if (! scan) {
-                scan = loceol;
+                scan = this_eol;
             }
 	}
 	break;
     case SANY:
         if (utf8_target) {
-	    while (scan < loceol && hardcount < max) {
+	    while (scan < this_eol && hardcount < max) {
 	        scan += UTF8SKIP(scan);
 		hardcount++;
 	    }
 	}
 	else
-	    scan = loceol;
+	    scan = this_eol;
 	break;
     case EXACTL:
         _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
@@ -9170,12 +9172,12 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
          * can use UTF8_IS_INVARIANT() even if the pattern isn't UTF-8, as it's
          * true iff it doesn't matter if the argument is in UTF-8 or not */
         if (UTF8_IS_INVARIANT(c) || (! utf8_target && ! reginfo->is_utf8_pat)) {
-            if (utf8_target && loceol - scan > max) {
-                /* We didn't adjust <loceol> because is UTF-8, but ok to do so,
+            if (utf8_target && this_eol - scan > max) {
+                /* We didn't adjust <this_eol> because is UTF-8, but ok to do so,
                  * since here, to match at all, 1 char == 1 byte */
-                loceol = scan + max;
+                this_eol = scan + max;
             }
-            scan = (char *) find_span_end((U8 *) scan, (U8 *) loceol, (U8) c);
+            scan = (char *) find_span_end((U8 *) scan, (U8 *) this_eol, (U8) c);
 	}
 	else if (reginfo->is_utf8_pat) {
             if (utf8_target) {
@@ -9184,7 +9186,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                 /* When both target and pattern are UTF-8, we have to do
                  * string EQ */
                 while (hardcount < max
-                       && scan < loceol
+                       && scan < this_eol
                        && (scan_char_len = UTF8SKIP(scan)) <= STR_LEN(p)
                        && memEQ(scan, STRING(p), scan_char_len))
                 {
@@ -9197,7 +9199,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                 /* Target isn't utf8; convert the character in the UTF-8
                  * pattern to non-UTF8, and do a simple find */
                 c = EIGHT_BIT_UTF8_TO_NATIVE(c, *(STRING(p) + 1));
-                scan = (char *) find_span_end((U8 *) scan, (U8 *) loceol, (U8) c);
+                scan = (char *) find_span_end((U8 *) scan, (U8 *) this_eol, (U8) c);
             } /* else pattern char is above Latin1, can't possibly match the
                  non-UTF-8 target */
         }
@@ -9211,7 +9213,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 	    U8 low = UTF8_TWO_BYTE_LO(c);
 
 	    while (hardcount < max
-		    && scan + 1 < loceol
+		    && scan + 1 < this_eol
 		    && UCHARAT(scan) == high
 		    && UCHARAT(scan + 1) == low)
 	    {
@@ -9277,7 +9279,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
         {
             if (c1 == CHRTEST_VOID) {
                 /* Use full Unicode fold matching */
-                char *tmpeol = reginfo->strend;
+                char *tmpeol = loceol;
                 STRLEN pat_len = reginfo->is_utf8_pat ? UTF8SKIP(STRING(p)) : 1;
                 while (hardcount < max
                         && foldEQ_utf8_flags(scan, &tmpeol, 0, utf8_target,
@@ -9285,13 +9287,13 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                                              reginfo->is_utf8_pat, utf8_flags))
                 {
                     scan = tmpeol;
-                    tmpeol = reginfo->strend;
+                    tmpeol = loceol;
                     hardcount++;
                 }
             }
             else if (utf8_target) {
                 if (c1 == c2) {
-                    while (scan < loceol
+                    while (scan < this_eol
                            && hardcount < max
                            && memEQ(scan, c1_utf8, UTF8SKIP(scan)))
                     {
@@ -9300,7 +9302,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     }
                 }
                 else {
-                    while (scan < loceol
+                    while (scan < this_eol
                            && hardcount < max
                            && (memEQ(scan, c1_utf8, UTF8SKIP(scan))
                                || memEQ(scan, c2_utf8, UTF8SKIP(scan))))
@@ -9311,7 +9313,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                 }
             }
             else if (c1 == c2) {
-                scan = (char *) find_span_end((U8 *) scan, (U8 *) loceol, (U8) c1);
+                scan = (char *) find_span_end((U8 *) scan, (U8 *) this_eol, (U8) c1);
             }
             else {
                 /* See comments in regmatch() CURLY_B_min_known_fail.  We avoid
@@ -9323,12 +9325,12 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     U8 c1_c2_mask = ~ c1_c2_bits_differing;
 
                     scan = (char *) find_span_end_mask((U8 *) scan,
-                                                       (U8 *) loceol,
+                                                       (U8 *) this_eol,
                                                        c1 & c1_c2_mask,
                                                        c1_c2_mask);
                 }
                 else {
-                    while (    scan < loceol
+                    while (    scan < this_eol
                            && (UCHARAT(scan) == c1 || UCHARAT(scan) == c2))
                     {
                         scan++;
@@ -9350,40 +9352,40 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
     case ANYOF:
 	if (utf8_target) {
 	    while (hardcount < max
-                   && scan < loceol
-		   && reginclass(prog, p, (U8*)scan, (U8*) loceol, utf8_target))
+                   && scan < this_eol
+		   && reginclass(prog, p, (U8*)scan, (U8*) this_eol, utf8_target))
 	    {
 		scan += UTF8SKIP(scan);
 		hardcount++;
 	    }
 	}
         else if (ANYOF_FLAGS(p) & ~ ANYOF_MATCHES_ALL_ABOVE_BITMAP) {
-	    while (scan < loceol
+	    while (scan < this_eol
                     && reginclass(prog, p, (U8*)scan, (U8*)scan+1, 0))
 		scan++;
         }
         else {
-	    while (scan < loceol && ANYOF_BITMAP_TEST(p, *((U8*)scan)))
+	    while (scan < this_eol && ANYOF_BITMAP_TEST(p, *((U8*)scan)))
 		scan++;
 	}
 	break;
 
     case ANYOFM:
-        if (utf8_target && loceol - scan > max) {
+        if (utf8_target && this_eol - scan > max) {
 
-            /* We didn't adjust <loceol> at the beginning of this routine
+            /* We didn't adjust <this_eol> at the beginning of this routine
              * because is UTF-8, but it is actually ok to do so, since here, to
              * match, 1 char == 1 byte. */
-            loceol = scan + max;
+            this_eol = scan + max;
         }
 
-        scan = (char *) find_span_end_mask((U8 *) scan, (U8 *) loceol, (U8) ARG(p), FLAGS(p));
+        scan = (char *) find_span_end_mask((U8 *) scan, (U8 *) this_eol, (U8) ARG(p), FLAGS(p));
         break;
 
     case NANYOFM:
 	if (utf8_target) {
 	    while (     hardcount < max
-                   &&   scan < loceol
+                   &&   scan < this_eol
 		   &&  (*scan & FLAGS(p)) != ARG(p))
 	    {
 		scan += UTF8SKIP(scan);
@@ -9391,14 +9393,14 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 	    }
 	}
         else {
-            scan = (char *) find_next_masked((U8 *) scan, (U8 *) loceol, (U8) ARG(p), FLAGS(p));
+            scan = (char *) find_next_masked((U8 *) scan, (U8 *) this_eol, (U8) ARG(p), FLAGS(p));
 	}
         break;
 
     case ANYOFH:
         if (utf8_target) while (   hardcount < max
-                                && scan < loceol
-                                && reginclass(prog, p, (U8*)scan, (U8*) loceol,
+                                && scan < this_eol
+                                && reginclass(prog, p, (U8*)scan, (U8*) this_eol,
                                                                   TRUE))
         {
             scan += UTF8SKIP(scan);
@@ -9415,16 +9417,16 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
     case POSIXL:
         _CHECK_AND_WARN_PROBLEMATIC_LOCALE;
 	if (! utf8_target) {
-	    while (scan < loceol && to_complement ^ cBOOL(isFOO_lc(FLAGS(p),
+	    while (scan < this_eol && to_complement ^ cBOOL(isFOO_lc(FLAGS(p),
                                                                    *scan)))
             {
 		scan++;
             }
 	} else {
-	    while (hardcount < max && scan < loceol
+	    while (hardcount < max && scan < this_eol
                    && to_complement ^ cBOOL(isFOO_utf8_lc(FLAGS(p),
                                                                   (U8 *) scan,
-                                                                  (U8 *) loceol)))
+                                                                  (U8 *) this_eol)))
             {
                 scan += UTF8SKIP(scan);
 		hardcount++;
@@ -9439,14 +9441,14 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
         /* FALLTHROUGH */
 
     case POSIXA:
-        if (utf8_target && loceol - scan > max) {
+        if (utf8_target && this_eol - scan > max) {
 
-            /* We didn't adjust <loceol> at the beginning of this routine
+            /* We didn't adjust <this_eol> at the beginning of this routine
              * because is UTF-8, but it is actually ok to do so, since here, to
              * match, 1 char == 1 byte. */
-            loceol = scan + max;
+            this_eol = scan + max;
         }
-        while (scan < loceol && _generic_isCC_A((U8) *scan, FLAGS(p))) {
+        while (scan < this_eol && _generic_isCC_A((U8) *scan, FLAGS(p))) {
 	    scan++;
 	}
 	break;
@@ -9460,7 +9462,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 
     case NPOSIXA:
         if (! utf8_target) {
-            while (scan < loceol && ! _generic_isCC_A((U8) *scan, FLAGS(p))) {
+            while (scan < this_eol && ! _generic_isCC_A((U8) *scan, FLAGS(p))) {
                 scan++;
             }
         }
@@ -9468,8 +9470,8 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 
             /* The complement of something that matches only ASCII matches all
              * non-ASCII, plus everything in ASCII that isn't in the class. */
-	    while (hardcount < max && scan < loceol
-                   && (   ! isASCII_utf8_safe(scan, reginfo->strend)
+	    while (hardcount < max && scan < this_eol
+                   && (   ! isASCII_utf8_safe(scan, loceol)
                        || ! _generic_isCC_A((U8) *scan, FLAGS(p))))
             {
                 scan += UTF8SKIP(scan);
@@ -9484,7 +9486,7 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 
     case POSIXU:
 	if (! utf8_target) {
-            while (scan < loceol && to_complement
+            while (scan < this_eol && to_complement
                                 ^ cBOOL(_generic_isCC((U8) *scan, FLAGS(p))))
             {
                 scan++;
@@ -9495,11 +9497,11 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
             classnum = (_char_class_number) FLAGS(p);
             switch (classnum) {
                 default:
-                    while (   hardcount < max && scan < loceol
+                    while (   hardcount < max && scan < this_eol
                            && to_complement ^ cBOOL(_invlist_contains_cp(
                                               PL_XPosix_ptrs[classnum],
                                               utf8_to_uvchr_buf((U8 *) scan,
-                                                                (U8 *) loceol,
+                                                                (U8 *) this_eol,
                                                                 NULL))))
                     {
                         scan += UTF8SKIP(scan);
@@ -9515,9 +9517,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 
                 case _CC_ENUM_SPACE:
                     while (hardcount < max
-                           && scan < loceol
+                           && scan < this_eol
                            && (to_complement
-                               ^ cBOOL(isSPACE_utf8_safe(scan, loceol))))
+                               ^ cBOOL(isSPACE_utf8_safe(scan, this_eol))))
                     {
                         scan += UTF8SKIP(scan);
                         hardcount++;
@@ -9525,9 +9527,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     break;
                 case _CC_ENUM_BLANK:
                     while (hardcount < max
-                           && scan < loceol
+                           && scan < this_eol
                            && (to_complement
-                                ^ cBOOL(isBLANK_utf8_safe(scan, loceol))))
+                                ^ cBOOL(isBLANK_utf8_safe(scan, this_eol))))
                     {
                         scan += UTF8SKIP(scan);
                         hardcount++;
@@ -9535,9 +9537,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     break;
                 case _CC_ENUM_XDIGIT:
                     while (hardcount < max
-                           && scan < loceol
+                           && scan < this_eol
                            && (to_complement
-                               ^ cBOOL(isXDIGIT_utf8_safe(scan, loceol))))
+                               ^ cBOOL(isXDIGIT_utf8_safe(scan, this_eol))))
                     {
                         scan += UTF8SKIP(scan);
                         hardcount++;
@@ -9545,9 +9547,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     break;
                 case _CC_ENUM_VERTSPACE:
                     while (hardcount < max
-                           && scan < loceol
+                           && scan < this_eol
                            && (to_complement
-                               ^ cBOOL(isVERTWS_utf8_safe(scan, loceol))))
+                               ^ cBOOL(isVERTWS_utf8_safe(scan, this_eol))))
                     {
                         scan += UTF8SKIP(scan);
                         hardcount++;
@@ -9555,9 +9557,9 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
                     break;
                 case _CC_ENUM_CNTRL:
                     while (hardcount < max
-                           && scan < loceol
+                           && scan < this_eol
                            && (to_complement
-                               ^ cBOOL(isCNTRL_utf8_safe(scan, loceol))))
+                               ^ cBOOL(isCNTRL_utf8_safe(scan, this_eol))))
                     {
                         scan += UTF8SKIP(scan);
                         hardcount++;
@@ -9569,17 +9571,16 @@ S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p,
 
     case LNBREAK:
         if (utf8_target) {
-	    while (hardcount < max && scan < loceol &&
-                    (c=is_LNBREAK_utf8_safe(scan, loceol))) {
+	    while (hardcount < max && scan < this_eol &&
+                    (c=is_LNBREAK_utf8_safe(scan, this_eol))) {
 		scan += c;
 		hardcount++;
 	    }
 	} else {
             /* LNBREAK can match one or two latin chars, which is ok, but we
              * have to use hardcount in this situation, and throw away the
-             * adjustment to <loceol> done before the switch statement */
-            ;
-	    while (scan < reginfo->strend && (c=is_LNBREAK_latin1_safe(scan, reginfo->strend))) {
+             * adjustment to <this_eol> done before the switch statement */
+	    while (scan < loceol && (c=is_LNBREAK_latin1_safe(scan, loceol))) {
 		scan+=c;
 		hardcount++;
 	    }