commit-tree.c: check_valid() microoptimization.

There is no point reading the whole object just to make sure it exists and
it is of the expected type.  We added sha1_object_info() for such need
after this code was written, so use it.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/commit-tree.c b/commit-tree.c
index 2d86518..2595850 100644 (file)
--- a/commit-tree.c
+++ b/commit-tree.c
@@ -45,14 +45,13 @@ static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
 
 static void check_valid(unsigned char *sha1, const char *expect)
 {
-       void *buf;
        char type[20];
-       unsigned long size;
 
-       buf = read_sha1_file(sha1, type, &size);
-       if (!buf || strcmp(type, expect))
-               die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
-       free(buf);
+       if (sha1_object_info(sha1, type, NULL))
+               die("%s is not a valid object", sha1_to_hex(sha1));
+       if (expect && strcmp(type, expect))
+               die("%s is not a valid '%s' object", sha1_to_hex(sha1),
+                   expect);
 }
 
 /*