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resolve_gitlink_ref(): avoid memory allocation in many cases

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If we don't have to strip trailing '/' from the submodule path, then
don't allocate and copy the submodule name.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2016-09-04 18:08:23 +02:00 committed by Junio C Hamano
parent 424dcc7683
commit 48a8475fd3
1 changed files with 13 additions and 6 deletions
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19
refs.c
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@ -1301,19 +1301,26 @@ const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1)
{
int len = strlen(path);
struct strbuf submodule = STRBUF_INIT;
size_t len = strlen(path);
struct ref_store *refs;
int flags;
while (len && path[len-1] == '/')
while (len && path[len - 1] == '/')
len--;
if (!len)
return -1;
strbuf_add(&submodule, path, len);
refs = get_ref_store(submodule.buf);
strbuf_release(&submodule);
if (path[len]) {
/* We need to strip off one or more trailing slashes */
char *stripped = xmemdupz(path, len);
refs = get_ref_store(stripped);
free(stripped);
} else {
refs = get_ref_store(path);
}
if (!refs)
return -1;