convert "oidcmp() != 0" to "!oideq()"

This is the flip side of the previous two patches: checking
for a non-zero oidcmp() can be more strictly expressed as
inequality. Like those patches, we write "!= 0" in the
coccinelle transformation, which covers by isomorphism the
more common:

  if (oidcmp(E1, E2))

As with the previous two patches, this patch can be achieved
almost entirely by running "make coccicheck"; the only
differences are manual line-wrap fixes to match the original
code.

There is one thing to note for anybody replicating this,
though: coccinelle 1.0.4 seems to miss the case in
builtin/tag.c, even though it's basically the same as all
the others. Running with 1.0.7 does catch this, so
presumably it's just a coccinelle bug that was fixed in the
interim.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/sha1-file.c b/sha1-file.c
index 71f49ee56d..cc8a196349 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -825,7 +825,7 @@ int check_object_signature(const struct object_id *oid, void *map,
 
 	if (map) {
 		hash_object_file(map, size, type, &real_oid);
-		return oidcmp(oid, &real_oid) ? -1 : 0;
+		return !oideq(oid, &real_oid) ? -1 : 0;
 	}
 
 	st = open_istream(oid, &obj_type, &size, NULL);
@@ -852,7 +852,7 @@ int check_object_signature(const struct object_id *oid, void *map,
 	}
 	the_hash_algo->final_fn(real_oid.hash, &c);
 	close_istream(st);
-	return oidcmp(oid, &real_oid) ? -1 : 0;
+	return !oideq(oid, &real_oid) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -1671,7 +1671,7 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
 		die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid),
 		    ret);
 	the_hash_algo->final_fn(parano_oid.hash, &c);
-	if (oidcmp(oid, &parano_oid) != 0)
+	if (!oideq(oid, &parano_oid))
 		die(_("confused by unstable object source data for %s"),
 		    oid_to_hex(oid));