configure: make iconv tests aware of user arguments

diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index af9fffe6e8e145b066157da8791c749257e7c8e9..574b3e833711fe3794636b86dbf2b9d9deb5e151 100644 (file)
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -10,7 +10,7 @@ static unsigned int contains(struct diff_filespec *one,
                             regex_t *regexp)
 {
        unsigned int cnt;
-       unsigned long offset, sz;
+       unsigned long sz;
        const char *data;
        if (diff_populate_filespec(one, 0))
                return 0;
@@ -33,15 +33,13 @@ static unsigned int contains(struct diff_filespec *one,
                }
 
        } else { /* Classic exact string match */
-               /* Yes, I've heard of strstr(), but the thing is *data may
-                * not be NUL terminated.  Sue me.
-                */
-               for (offset = 0; offset + len <= sz; offset++) {
-                       /* we count non-overlapping occurrences of needle */
-                       if (!memcmp(needle, data + offset, len)) {
-                               offset += len - 1;
-                               cnt++;
-                       }
+               while (sz) {
+                       const char *found = memmem(data, sz, needle, len);
+                       if (!found)
+                               break;
+                       sz -= found - data + len;
+                       data = found + len;
+                       cnt++;
                }
        }
        diff_free_filespec_data(one);