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>

Jeff King committed Dec 10, 2014 at 05:40 UTC 6a49870a7245934eac671e3dcd7186a90dac255d
1 file changed +15 -12
refs.c
+15 -12
@@ -973,8 +973,10 @@ static const char PACKED_REFS_HEADER[] =
973 * Return a pointer to the refname within the line (null-terminated),
974 * or NULL if there was a problem.
975 */
976 -static const char *parse_ref_line(char *line, unsigned char *sha1)
976 +static const char *parse_ref_line(struct strbuf *line, unsigned char *sha1)
977 {
978 + const char *ref;
979 +
980 /*
981 * 42: the answer to everything.
982 *
@@ -983,22 +985,23 @@ static const char *parse_ref_line(char *line, unsigned char *sha1)
985 * +1 (space in between hex and name)
986 * +1 (newline at the end of the line)
987 */
986 - int len = strlen(line) - 42;
987 -
988 - if (len <= 0)
988 + if (line->len <= 42)
989 return NULL;
990 - if (get_sha1_hex(line, sha1) < 0)
990 +
991 + if (get_sha1_hex(line->buf, sha1) < 0)
992 return NULL;
992 - if (!isspace(line[40]))
993 + if (!isspace(line->buf[40]))
994 return NULL;
994 - line += 41;
995 - if (isspace(*line))
995 +
996 + ref = line->buf + 41;
997 + if (isspace(*ref))
998 return NULL;
997 - if (line[len] != '\n')
999 +
1000 + if (line->buf[line->len - 1] != '\n')
1001 return NULL;
999 - line[len] = 0;
1002 + line->buf[--line->len] = 0;
1003
1001 - return line;
1004 + return ref;
1005 }
1006
1007 /*
@@ -1049,7 +1052,7 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
1052 continue;
1053 }
1054
1052 - refname = parse_ref_line(line.buf, sha1);
1055 + refname = parse_ref_line(&line, sha1);
1056 if (refname) {
1057 last = create_ref_entry(refname, sha1, REF_ISPACKED, 1);
1058 if (peeled == PEELED_FULLY ||