[PATCH 2/5] cache-tree.c::cache_tree_find(): simplify inernal API

From: Junio C Hamano <gitster@pobox.com>
Date: May 23, 2009, 19:24 UTC
Message-ID: <1243106678-6343-3-git-send-email-gitster@pobox.com>
In-Reply-To: <1243106678-6343-2-git-send-email-gitster@pobox.com>

Earlier cache_tree_find() needs to be called with a valid cache_tree, but repeated look-up may find an invalid or missing cache_tree in between. Help simplify the callers by returning NULL to mean "nothing appropriate found" when the input is NULL.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 cache-tree.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/cache-tree.c b/cache-tree.c
index 6dd8411..5481e43 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -514,6 +514,8 @@ struct cache_tree *cache_tree_read(const char *buffer, unsigned long size)
 
 static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *path)
 {
+	if (!it)
+		return NULL;
 	while (*path) {
 		const char *slash;
 		struct cache_tree_sub *sub;

-- 
1.6.3.1.145.gb74d77