sha1_file: convert assert_sha1_type to object_id

Convert this function to take a pointer to struct object_id and rename
it to assert_oid_type.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/commit-tree.c

@@ -58,7 +58,7 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 				usage(commit_tree_usage);
 			if (get_oid_commit(argv[i], &oid))
 				die("Not a valid object name %s", argv[i]);
-			assert_sha1_type(oid.hash, OBJ_COMMIT);
+			assert_oid_type(&oid, OBJ_COMMIT);
 			new_parent(lookup_commit(&oid), &parents);
 			continue;
 		}

cache.h

@@ -1275,7 +1275,7 @@ extern int has_object_file_with_flags(const struct object_id *oid, int flags);
  */
 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 
-extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
+extern void assert_oid_type(const struct object_id *oid, enum object_type expect);
 
 /* Helper to check and "touch" a file */
 extern int check_and_freshen_file(const char *fn, int freshen);

commit.c

@@ -1517,7 +1517,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 	int encoding_is_utf8;
 	struct strbuf buffer;
 
-	assert_sha1_type(tree->hash, OBJ_TREE);
+	assert_oid_type(tree, OBJ_TREE);
 
 	if (memchr(msg, '\0', msg_len))
 		return error("a NUL byte in commit log message not allowed.");

sha1_file.c

@@ -1966,13 +1966,13 @@ int read_pack_header(int fd, struct pack_header *header)
 	return 0;
 }
 
-void assert_sha1_type(const unsigned char *sha1, enum object_type expect)
+void assert_oid_type(const struct object_id *oid, enum object_type expect)
 {
-	enum object_type type = sha1_object_info(sha1, NULL);
+	enum object_type type = sha1_object_info(oid->hash, NULL);
 	if (type < 0)
-		die("%s is not a valid object", sha1_to_hex(sha1));
+		die("%s is not a valid object", oid_to_hex(oid));
 	if (type != expect)
-		die("%s is not a valid '%s' object", sha1_to_hex(sha1),
+		die("%s is not a valid '%s' object", oid_to_hex(oid),
 		    type_name(expect));
 }