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validate_headref: use skip_prefix for symref parsing

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Since the previous commit guarantees that our symref buffer
is NUL-terminated, we can just use skip_prefix() and friends
to parse it. This is shorter and saves us having to deal
with magic numbers and keeping the "len" counter up to date.

While we're at it, let's name the rather obscure "buf" to
"refname", since that is the thing we are parsing with it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2017-09-27 02:17:26 -04:00 committed by Junio C Hamano
parent 6e68c91410
commit 7eb4b9d025
1 changed files with 6 additions and 9 deletions
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15
path.c
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@ -636,7 +636,8 @@ void strbuf_git_common_path(struct strbuf *sb,
int validate_headref(const char *path)
{
struct stat st;
char *buf, buffer[256];
char buffer[256];
const char *refname;
unsigned char sha1[20];
int fd;
ssize_t len;
@ -668,14 +669,10 @@ int validate_headref(const char *path)
/*
* Is it a symbolic ref?
*/
if (len < 4)
return -1;
if (!memcmp("ref:", buffer, 4)) {
buf = buffer + 4;
len -= 4;
while (len && isspace(*buf))
buf++, len--;
if (len >= 5 && !memcmp("refs/", buf, 5))
if (skip_prefix(buffer, "ref:", &refname)) {
while (isspace(*refname))
refname++;
if (starts_with(refname, "refs/"))
return 0;
}