contrib: add 'git difftool' for launching common merge tools

diff --git a/read-cache.c b/read-cache.c
index c14b56231379b1aeaa5f648d208d77ab68818d94..b1475ffa0962e1f0238fdb9a6870aa4b0bfd6d3b 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -99,27 +99,21 @@ static int ce_compare_data(struct cache_entry *ce, struct stat *st)
 static int ce_compare_link(struct cache_entry *ce, size_t expected_size)
 {
        int match = -1;
-       char *target;
        void *buffer;
        unsigned long size;
        enum object_type type;
-       int len;
+       struct strbuf sb = STRBUF_INIT;
 
-       target = xmalloc(expected_size);
-       len = readlink(ce->name, target, expected_size);
-       if (len != expected_size) {
-               free(target);
+       if (strbuf_readlink(&sb, ce->name, expected_size))
                return -1;
-       }
+
        buffer = read_sha1_file(ce->sha1, &type, &size);
-       if (!buffer) {
-               free(target);
-               return -1;
+       if (buffer) {
+               if (size == sb.len)
+                       match = memcmp(buffer, sb.buf, size);
+               free(buffer);
        }
-       if (size == expected_size)
-               match = memcmp(buffer, target, size);
-       free(buffer);
-       free(target);
+       strbuf_release(&sb);
        return match;
 }