Remove two warnings (sub diag() was redefined, and implict split is
[p5sagit/p5-mst-13.2.git] / regexec.c
index 1b9fca1..a02a0c0 100644 (file)
--- a/regexec.c
+++ b/regexec.c
@@ -989,7 +989,11 @@ Perl_re_intuit_start(pTHX_ REGEXP * const prog, SV *sv, char *strpos,
     return NULL;
 }
 
-
+#define DECL_TRIE_TYPE(scan) \
+    const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
+                   trie_type = (scan->flags != EXACT) \
+                             ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
+                              : (do_utf8 ? trie_utf8 : trie_plain)
 
 #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len,  \
 uvc, charid, foldlen, foldbuf, uniflags) STMT_START {                       \
@@ -1007,6 +1011,19 @@ uvc, charid, foldlen, foldbuf, uniflags) STMT_START {                       \
            uscan = foldbuf + UNISKIP( uvc );                               \
        }                                                                   \
        break;                                                              \
+    case trie_latin_utf8_fold:                                              \
+       if ( foldlen>0 ) {                                                  \
+           uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags );     \
+           foldlen -= len;                                                 \
+           uscan += len;                                                   \
+           len=0;                                                          \
+       } else {                                                            \
+           len = 1;                                                        \
+           uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen );               \
+           foldlen -= UNISKIP( uvc );                                      \
+           uscan = foldbuf + UNISKIP( uvc );                               \
+       }                                                                   \
+       break;                                                              \
     case trie_utf8:                                                         \
        uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags );       \
        break;                                                              \
@@ -1029,12 +1046,14 @@ uvc, charid, foldlen, foldbuf, uniflags) STMT_START {                       \
     }                                                                       \
 } STMT_END
 
-#define REXEC_FBC_EXACTISH_CHECK(CoNd)                  \
+#define REXEC_FBC_EXACTISH_CHECK(CoNd)                 \
+{                                                      \
+    char *my_strend= (char *)strend;                   \
     if ( (CoNd)                                        \
         && (ln == len ||                              \
-            ibcmp_utf8(s, NULL, 0,  do_utf8,          \
+            !ibcmp_utf8(s, &my_strend, 0,  do_utf8,   \
                        m, NULL, ln, (bool)UTF))       \
-        && (!reginfo || regtry(reginfo, &s)) )         \
+        && (!reginfo || regtry(reginfo, &s)) )        \
        goto got_it;                                   \
     else {                                             \
         U8 foldbuf[UTF8_MAXBYTES_CASE+1];             \
@@ -1042,15 +1061,14 @@ uvc, charid, foldlen, foldbuf, uniflags) STMT_START {                       \
         f = to_utf8_fold(tmpbuf, foldbuf, &foldlen);  \
         if ( f != c                                   \
              && (f == c1 || f == c2)                  \
-             && (ln == foldlen ||                     \
-                 !ibcmp_utf8((char *) foldbuf,        \
-                             NULL, foldlen, do_utf8,  \
-                             m,                       \
-                             NULL, ln, (bool)UTF))    \
-             && (!reginfo || regtry(reginfo, &s)) )    \
+             && (ln == len ||                         \
+               !ibcmp_utf8(s, &my_strend, 0,  do_utf8,\
+                             m, NULL, ln, (bool)UTF)) \
+             && (!reginfo || regtry(reginfo, &s)) )   \
              goto got_it;                             \
     }                                                  \
-    s += len
+}                                                      \
+s += len
 
 #define REXEC_FBC_EXACTISH_SCAN(CoNd)                     \
 STMT_START {                                              \
@@ -1209,15 +1227,28 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
                U8 *sm = (U8 *) m;
                U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
                U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-               const U32 uniflags = UTF8_ALLOW_DEFAULT;
-
-               to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
-               to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
+               /* used by commented-out code below */
+               /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
+               
+                /* XXX: Since the node will be case folded at compile
+                   time this logic is a little odd, although im not 
+                   sure that its actually wrong. --dmq */
+                   
+               c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
+               c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
+
+               /* XXX: This is kinda strange. to_utf8_XYZ returns the 
+                   codepoint of the first character in the converted
+                   form, yet originally we did the extra step. 
+                   No tests fail by commenting this code out however
+                   so Ive left it out. -- dmq.
+                   
                c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE, 
                                    0, uniflags);
                c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
                                    0, uniflags);
+                */
+                
                lnc = 0;
                while (sm < ((U8 *) m + ln)) {
                    lnc++;
@@ -1252,24 +1283,33 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
             * matching (called "loose matching" in Unicode).
             * ibcmp_utf8() will do just that. */
 
-           if (do_utf8) {
+           if (do_utf8 || UTF) {
                UV c, f;
                U8 tmpbuf [UTF8_MAXBYTES+1];
-               STRLEN len, foldlen;
+               STRLEN len = 1;
+               STRLEN foldlen;
                const U32 uniflags = UTF8_ALLOW_DEFAULT;
                if (c1 == c2) {
                    /* Upper and lower of 1st char are equal -
                     * probably not a "letter". */
                    while (s <= e) {
-                       c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
+                       if (do_utf8) {
+                           c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
                                           uniflags);
+                        } else {
+                            c = *((U8*)s);
+                        }                                        
                        REXEC_FBC_EXACTISH_CHECK(c == c1);
                    }
                }
                else {
                    while (s <= e) {
-                     c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
+                       if (do_utf8) {
+                           c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
                                           uniflags);
+                        } else {
+                            c = *((U8*)s);
+                        }
 
                        /* Handle some of the three Greek sigmas cases.
                         * Note that not all the possible combinations
@@ -1287,6 +1327,7 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
                }
            }
            else {
+               /* Neither pattern nor string are UTF8 */
                if (c1 == c2)
                    REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
                else
@@ -1461,10 +1502,7 @@ S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
        case AHOCORASICKC:
        case AHOCORASICK: 
            {
-               const enum { trie_plain, trie_utf8, trie_utf8_fold }
-                   trie_type = do_utf8 ?
-                         (c->flags == EXACT ? trie_utf8 : trie_utf8_fold)
-                       : trie_plain;
+               DECL_TRIE_TYPE(c);
                 /* what trie are we using right now */
                reg_ac_data *aho
                    = (reg_ac_data*)progi->data->data[ ARG( c ) ];
@@ -2872,10 +2910,7 @@ S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
        case TRIE:
            {
                 /* what type of TRIE am I? (utf8 makes this contextual) */
-               const enum { trie_plain, trie_utf8, trie_utf8_fold }
-                   trie_type = do_utf8 ?
-                         (scan->flags == EXACT ? trie_utf8 : trie_utf8_fold)
-                       : trie_plain;
+                DECL_TRIE_TYPE(scan);
 
                 /* what trie are we using right now */
                reg_trie_data * const trie