path: root/cache.h
diff options
authorJeff King <>2018-08-28 21:22:40 (GMT)
committerJunio C Hamano <>2018-08-29 18:32:49 (GMT)
commit4a7e27e95797c0a094f8ee300a260777ddd7eec9 (patch)
tree4c29cd40abed19f50f4fd2459429779d0c9b13d1 /cache.h
parent14438c4497c3ab3988cf50ebd504acef3735953c (diff)
convert "oidcmp() == 0" to oideq()
Using the more restrictive oideq() should, in the long run, give the compiler more opportunities to optimize these callsites. For now, this conversion should be a complete noop with respect to the generated code. The result is also perhaps a little more readable, as it avoids the "zero is equal" idiom. Since it's so prevalent in C, I think seasoned programmers tend not to even notice it anymore, but it can sometimes make for awkward double negations (e.g., we can drop a few !!oidcmp() instances here). This patch was generated almost entirely by the included coccinelle patch. This mechanical conversion should be completely safe, because we check explicitly for cases where oidcmp() is compared to 0, which is what oideq() is doing under the hood. Note that we don't have to catch "!oidcmp()" separately; coccinelle's standard isomorphisms make sure the two are treated equivalently. I say "almost" because I did hand-edit the coccinelle output to fix up a few style violations (it mostly keeps the original formatting, but sometimes unwraps long lines). Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'cache.h')
1 files changed, 2 insertions, 2 deletions
diff --git a/cache.h b/cache.h
index f6d227f..d090f71 100644
--- a/cache.h
+++ b/cache.h
@@ -1100,7 +1100,7 @@ static inline int is_empty_blob_sha1(const unsigned char *sha1)
static inline int is_empty_blob_oid(const struct object_id *oid)
- return !oidcmp(oid, the_hash_algo->empty_blob);
+ return oideq(oid, the_hash_algo->empty_blob);
static inline int is_empty_tree_sha1(const unsigned char *sha1)
@@ -1110,7 +1110,7 @@ static inline int is_empty_tree_sha1(const unsigned char *sha1)
static inline int is_empty_tree_oid(const struct object_id *oid)
- return !oidcmp(oid, the_hash_algo->empty_tree);
+ return oideq(oid, the_hash_algo->empty_tree);
const char *empty_tree_oid_hex(void);