read_packed_refs: pass strbuf to parse_ref_line

Now that we have a strbuf in read_packed_refs, we can pass
it straight to the line parser, which saves us an extra
strlen.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index 60a7e33d5b1bad9000d2a230eac09190fa858c85..047353ea1ff63daaeb04475d05515fb9bbbe7c39 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -973,8 +973,10 @@ static const char PACKED_REFS_HEADER[] =
  * Return a pointer to the refname within the line (null-terminated),
  * or NULL if there was a problem.
  */
-static const char *parse_ref_line(char *line, unsigned char *sha1)
+static const char *parse_ref_line(struct strbuf *line, unsigned char *sha1)
 {
+       const char *ref;
+
        /*
         * 42: the answer to everything.
         *
@@ -983,22 +985,23 @@ static const char *parse_ref_line(char *line, unsigned char *sha1)
         *  +1 (space in between hex and name)
         *  +1 (newline at the end of the line)
         */
-       int len = strlen(line) - 42;
-
-       if (len <= 0)
+       if (line->len <= 42)
                return NULL;
-       if (get_sha1_hex(line, sha1) < 0)
+
+       if (get_sha1_hex(line->buf, sha1) < 0)
                return NULL;
-       if (!isspace(line[40]))
+       if (!isspace(line->buf[40]))
                return NULL;
-       line += 41;
-       if (isspace(*line))
+
+       ref = line->buf + 41;
+       if (isspace(*ref))
                return NULL;
-       if (line[len] != '\n')
+
+       if (line->buf[line->len - 1] != '\n')
                return NULL;
-       line[len] = 0;
+       line->buf[--line->len] = 0;
 
-       return line;
+       return ref;
 }
 
 /*
@@ -1049,7 +1052,7 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
                        continue;
                }
 
-               refname = parse_ref_line(line.buf, sha1);
+               refname = parse_ref_line(&line, sha1);
                if (refname) {
                        last = create_ref_entry(refname, sha1, REF_ISPACKED, 1);
                        if (peeled == PEELED_FULLY ||