(GET_CHAR_BEFORE_2): Use PREV_CHAR_BOUNDARY.

(re_search_2): Likewise.

diff --git a/src/regex.c b/src/regex.c
index 5cb997336f600f005e4b6d827e76913863884fde..148100805eb7021a0aa8e1ec496e4c5b560245b3 100644 (file)
--- a/src/regex.c
+++ b/src/regex.c
@@ -157,8 +157,9 @@
        {                                                               \
         re_char *dtemp = (p) == (str2) ? (end1) : (p);                 \
         re_char *dlimit = ((p) > (str2) && (p) <= (end2)) ? (str2) : (str1); \
-        while (dtemp-- > dlimit && !CHAR_HEAD_P (*dtemp));             \
-        c = STRING_CHAR (dtemp, (p) - dtemp);                          \
+        re_char *d0 = dtemp;                                           \
+        PREV_CHAR_BOUNDARY (d0, dlimit);                               \
+        c = STRING_CHAR (d0, dtemp - d0);                              \
        }                                                               \
      else                                                              \
        (c = ((p) == (str2) ? (end1) : (p))[-1]);                       \
@@ -235,6 +236,7 @@ enum syntaxcode { Swhitespace = 0, Sword = 1 };
 # define SINGLE_BYTE_CHAR_P(c) (1)
 # define SAME_CHARSET_P(c1, c2) (1)
 # define MULTIBYTE_FORM_LENGTH(p, s) (1)
+# define PREV_CHAR_BOUNDARY(p, limit) ((p)--)
 # define STRING_CHAR(p, s) (*(p))
 # define RE_STRING_CHAR STRING_CHAR
 # define CHAR_STRING(c, s) (*(s) = (c), 1)
@@ -4064,6 +4066,10 @@ re_search (bufp, string, size, startpos, range, regs)
 }
 WEAK_ALIAS (__re_search, re_search)
 
+/* Head address of virtual concatenation of string.  */
+#define HEAD_ADDR_VSTRING(P)           \
+  (((P) >= size1 ? string2 : string1))
+
 /* End address of virtual concatenation of string.  */
 #define STOP_ADDR_VSTRING(P)                           \
   (((P) >= size1 ? string2 + size2 : string1 + size1))
@@ -4299,26 +4305,17 @@ re_search_2 (bufp, str1, size1, str2, size2, startpos, range, regs, stop)
          /* Update STARTPOS to the previous character boundary.  */
          if (multibyte)
            {
-             re_char *p = POS_ADDR_VSTRING (startpos);
-             int len = 0;
+             re_char *p = POS_ADDR_VSTRING (startpos) + 1;
+             re_char *p0 = p;
+             re_char *phead = HEAD_ADDR_VSTRING (startpos);
 
              /* Find the head of multibyte form.  */
-             while (!CHAR_HEAD_P (*p))
-               p--, len++;
-
-             /* Adjust it. */
-#if 0                          /* XXX */
-             if (MULTIBYTE_FORM_LENGTH (p, len + 1) != (len + 1))
-               ;
-             else
-#endif
-               {
-                 range += len;
-                 if (range > 0)
-                   break;
+             PREV_CHAR_BOUNDARY (p, phead);
+             range += p0 - 1 - p;
+             if (range > 0)
+               break;
 
-                 startpos -= len;
-               }
+             startpos -= p0 - 1 - p;
            }
        }
     }