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sha1_name: check @{-N} errors sooner 

It's trivial to check for them in the @{N} parsing loop.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ramkumar Ramachandra 2013-05-07 16:55:11 -05:00 committed by Junio C Hamano
parent 128fd54dae
commit 83d16bc7be
1 changed files with 4 additions and 5 deletions
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9
sha1_name.c
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@ -448,7 +448,10 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
if (len && str[len-1] == '}') {
for (at = len-4; at >= 0; at--) {
if (str[at] == '@' && str[at+1] == '{') {
if (at == 0 && str[2] == '-') {
if (str[at+2] == '-') {
if (at != 0)
/* @{-N} not at start */
return -1;
nth_prior = 1;
continue;
}
@ -497,10 +500,6 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
unsigned long co_time;
int co_tz, co_cnt;
/* a @{-N} placed anywhere except the start is an error */
if (str[at+2] == '-')
return -1;
/* Is it asking for N-th entry, or approxidate? */
for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
char ch = str[at+2+i];