provisional MakeMaker patch for VMS
[p5sagit/p5-mst-13.2.git] / regexec.c
index 1ad4003..7b459e2 100644 (file)
--- a/regexec.c
+++ b/regexec.c
@@ -393,11 +393,22 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos,
     SV *dsv = PERL_DEBUG_PAD_ZERO(0);
 #endif
 
+    if (prog->reganch & ROPT_UTF8) {
+       DEBUG_r(PerlIO_printf(Perl_debug_log,
+                             "UTF-8 regex...\n"));
+       PL_reg_flags |= RF_utf8;
+    }
+
     DEBUG_r({
-        char*s   = UTF ? sv_uni_display(dsv, sv, 60, 0) : strpos;
-        int  len = UTF ? strlen(s) : strend - strpos;
+        char *s   = PL_reg_match_utf8 ?
+                        sv_uni_display(dsv, sv, 60, 0) : strpos;
+        int   len = PL_reg_match_utf8 ?
+                        strlen(s) : strend - strpos;
         if (!PL_colorset)
              reginitcolors();
+        if (PL_reg_match_utf8)
+            DEBUG_r(PerlIO_printf(Perl_debug_log,
+                                  "UTF-8 target...\n"));
         PerlIO_printf(Perl_debug_log,
                       "%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],
@@ -411,9 +422,6 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos,
              );
     });
 
-    if (prog->reganch & ROPT_UTF8)
-       PL_reg_flags |= RF_utf8;
-
     if (prog->minlen > CHR_DIST((U8*)strend, (U8*)strpos)) {
        DEBUG_r(PerlIO_printf(Perl_debug_log,
                              "String too short... [re_intuit_start]\n"));
@@ -967,27 +975,32 @@ S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *sta
                 * Fortunately, not getting this right is allowed
                 * for Unicode Regular Expression Support level 1,
                 * only one-to-one matching is required. --jhi */
-               if (c1 == c2)
+               if (c1 == c2) {
                    while (s <= e) {
                        if ( utf8_to_uvchr((U8*)s, &len) == c1
-                            && (ln == 1 ||
+                            && (ln == len ||
                                 ibcmp_utf8(s, do_utf8,  strend - s,
                                            m, UTF, ln))
                             && (norun || regtry(prog, s)) )
                            goto got_it;
                        s += len;
                    }
-               else
+               }
+               else {
                    while (s <= e) {
                        UV c = utf8_to_uvchr((U8*)s, &len);
+                       if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
+                           c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
+                           c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
                        if ( (c == c1 || c == c2)
-                            && (ln == 1 ||
+                            && (ln == len ||
                                 ibcmp_utf8(s, do_utf8, strend - s,
                                            m, UTF, ln))
                             && (norun || regtry(prog, s)) )
                            goto got_it;
                        s += len;
                    }
+               }
            }
            else {
                if (c1 == c2)
@@ -2232,10 +2245,10 @@ S_regmatch(pTHX_ regnode *prog)
            s = STRING(scan);
            ln = STR_LEN(scan);
            if (do_utf8 != (UTF!=0)) {
-               /* The target and the pattern have differing "utf8ness". */
+               /* The target and the pattern have differing utf8ness. */
                char *l = locinput;
                char *e = s + ln;
-               STRLEN len;
+               STRLEN ulen;
 
                if (do_utf8) {
                    /* The target is utf8, the pattern is not utf8. */
@@ -2243,9 +2256,9 @@ S_regmatch(pTHX_ regnode *prog)
                        if (l >= PL_regeol)
                             sayNO;
                        if (NATIVE_TO_UNI(*(U8*)s) !=
-                           utf8_to_uvchr((U8*)l, &len))
+                           utf8_to_uvchr((U8*)l, &ulen))
                             sayNO;
-                       l += len;
+                       l += ulen;
                        s ++;
                    }
                }
@@ -2255,9 +2268,9 @@ S_regmatch(pTHX_ regnode *prog)
                        if (l >= PL_regeol)
                            sayNO;
                        if (NATIVE_TO_UNI(*((U8*)l)) !=
-                           utf8_to_uvchr((U8*)s, &len))
+                           utf8_to_uvchr((U8*)s, &ulen))
                            sayNO;
-                       s += len;
+                       s += ulen;
                        l ++;
                    }
                }
@@ -2265,7 +2278,7 @@ S_regmatch(pTHX_ regnode *prog)
                nextchr = UCHARAT(locinput);
                break;
            }
-           /* The target and the pattern have the same "utf8ness". */
+           /* The target and the pattern have the same utf8ness. */
            /* Inline the first character, for speed. */
            if (UCHARAT(s) != nextchr)
                sayNO;
@@ -2283,26 +2296,85 @@ S_regmatch(pTHX_ regnode *prog)
            s = STRING(scan);
            ln = STR_LEN(scan);
 
-           if (do_utf8) {
+           {
                char *l = locinput;
-               char *e;
-               STRLEN ulen;
-               U8 tmpbuf[UTF8_MAXLEN_UCLC+1];
-               e = s + ln;
-               while (s < e) {
-                   if (l >= PL_regeol)
-                       sayNO;
-                   toLOWER_utf8((U8*)l, tmpbuf, &ulen);
-                   if (memNE(s, (char*)tmpbuf, ulen))
-                       sayNO;
-                   s += UTF8SKIP(s);
-                   l += ulen;
+               char *e = s + ln;
+               U8 tmpbuf[UTF8_MAXLEN_FOLD+1];
+
+               if (do_utf8 != (UTF!=0)) {
+                    /* The target and the pattern have differing utf8ness. */
+                    STRLEN ulen1, ulen2;
+                    UV cs, cl;
+
+                    if (do_utf8) {
+                         /* The target is utf8, the pattern is not utf8. */
+                         while (s < e) {
+                              if (l >= PL_regeol)
+                                   sayNO;
+
+                              cs = to_uni_fold(NATIVE_TO_UNI(*(U8*)s),
+                                               (U8*)s, &ulen1);
+                              cl = utf8_to_uvchr((U8*)l, &ulen2);
+
+                              if (cs != cl) {
+                                   cl = to_uni_fold(cl, (U8*)l, &ulen2);
+                                   if (ulen1 != ulen2 || cs != cl)
+                                        sayNO;
+                              }
+                              l += ulen1;
+                              s ++;
+                         }
+                    }
+                    else {
+                         /* The target is not utf8, the pattern is utf8. */
+                         while (s < e) {
+                              if (l >= PL_regeol)
+                                   sayNO;
+
+                              cs = utf8_to_uvchr((U8*)s, &ulen1);
+
+                              cl = to_uni_fold(NATIVE_TO_UNI(*(U8*)l),
+                                               (U8*)l, &ulen2);
+
+                              if (cs != cl) {
+                                   cs = to_uni_fold(cs, (U8*)s, &ulen1);
+                                   if (ulen1 != ulen2 || cs != cl)
+                                        sayNO;
+                              }
+                              l ++;
+                              s += ulen1;
+                         }
+                    }
+                    locinput = l;
+                    nextchr = UCHARAT(locinput);
+                    break;
+               }
+
+               if (do_utf8 && UTF) {
+                    /* Both the target and the pattern are utf8. */
+                    STRLEN ulen;
+                    
+                    while (s < e) {
+                         if (l >= PL_regeol)
+                              sayNO;
+                         if (UTF8SKIP(s) != UTF8SKIP(l) ||
+                             memNE(s, (char*)l, UTF8SKIP(s))) {
+                              to_utf8_fold((U8*)l, tmpbuf, &ulen);
+                              if (UTF8SKIP(s) != ulen ||
+                                  memNE(s, (char*)tmpbuf, ulen))
+                                   sayNO;
+                         }
+                         l += UTF8SKIP(l);
+                         s += UTF8SKIP(s);
+                    }
+                    locinput = l;
+                    nextchr = UCHARAT(locinput);
+                    break;
                }
-               locinput = l;
-               nextchr = UCHARAT(locinput);
-               break;
            }
 
+           /* Neither the target and the pattern are utf8. */
+
            /* Inline the first character, for speed. */
            if (UCHARAT(s) != nextchr &&
                UCHARAT(s) != ((OP(scan) == EXACTF)
@@ -2524,16 +2596,21 @@ S_regmatch(pTHX_ regnode *prog)
            nextchr = UCHARAT(++locinput);
            break;
        case CLUMP:
-           LOAD_UTF8_CHARCLASS(mark,"~");
-           if (locinput >= PL_regeol ||
-               swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
-               sayNO;
-           locinput += PL_utf8skip[nextchr];
-           while (locinput < PL_regeol &&
-                  swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
-               locinput += UTF8SKIP(locinput);
-           if (locinput > PL_regeol)
+           if (locinput >= PL_regeol)
                sayNO;
+           if  (do_utf8) {
+               LOAD_UTF8_CHARCLASS(mark,"~");
+               if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
+                   sayNO;
+               locinput += PL_utf8skip[nextchr];
+               while (locinput < PL_regeol &&
+                      swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
+                   locinput += UTF8SKIP(locinput);
+               if (locinput > PL_regeol)
+                   sayNO;
+           } 
+           else
+              locinput++;
            nextchr = UCHARAT(locinput);
            break;
        case REFFL: