From: Jeff King Date: Tue, 3 Sep 2013 20:27:30 +0000 (-0400) Subject: peel_onion: do not assume length of x_type globals X-Git-Tag: v1.8.5-rc0~102^2 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/c969b6a18d1cde3ffb8a5ca5cd45a57052c2cc95 peel_onion: do not assume length of x_type globals When we are parsing "rev^{foo}", we check "foo" against the various global type strings, like "commit_type", "tree_type", etc. This is nicely abstracted, but then we destroy the abstraction completely by using magic numbers that must match the length of the type strings. We could avoid these magic numbers by using skip_prefix. But taking a step back, we can realize that using the "commit_type" global is not really buying us anything. It is not ever going to change from being "commit" without causing severe breakage to existing uses. And even if it did change for some crazy reason, we would want to evaluate its effects on the "rev^{}" syntax, anyway. Let's just switch these to using a custom string literal, as we do for "rev^{object}". The resulting code is more robust to changes in the type strings, and is more readable. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- diff --git a/sha1_name.c b/sha1_name.c index 6dc496deb0..2f6e5abaaf 100644 --- a/sha1_name.c +++ b/sha1_name.c @@ -677,13 +677,13 @@ static int peel_onion(const char *name, int len, unsigned char *sha1) return -1; sp++; /* beginning of type name, or closing brace for empty */ - if (!strncmp(commit_type, sp, 6) && sp[6] == '}') + if (!prefixcmp(sp, "commit}")) expected_type = OBJ_COMMIT; - else if (!strncmp(tag_type, sp, 3) && sp[3] == '}') + else if (!prefixcmp(sp, "tag}")) expected_type = OBJ_TAG; - else if (!strncmp(tree_type, sp, 4) && sp[4] == '}') + else if (!prefixcmp(sp, "tree}")) expected_type = OBJ_TREE; - else if (!strncmp(blob_type, sp, 4) && sp[4] == '}') + else if (!prefixcmp(sp, "blob}")) expected_type = OBJ_BLOB; else if (!prefixcmp(sp, "object}")) expected_type = OBJ_ANY;