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authorNicolas Pitre <nico@cam.org>2008-10-20 20:46:19 (GMT)
committerJunio C Hamano <gitster@pobox.com>2008-10-20 22:16:23 (GMT)
commitce3f6dc655392803a59c9b2f2ec9509fd8061b33 (patch)
tree8e8bf1cb006a666da52991b2db3e0f3e49c9a5a0 /index-pack.c
parent6a87ed972c9c7a4b4378b6e34670d3aa2ac7ccc8 (diff)
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fix multiple issues in index-pack
Since commit 9441b61dc5, two issues affected correct behavior of index-pack: 1) The real_type of a delta object is the 'real_type' of its base, not the 'type' which can be a "delta type". Consequence of this is a corrupted pack index file which only needs to be recreated with a good index-pack command ('git verify-pack' will flag those). 2) The code sequence: result->data = patch_delta(get_base_data(base), base->obj->size, delta_data, delta_size, &result->size); has two issues of its own since base->obj->size should instead be base->size as we want the size of the actual object data and not the size of the delta object it is represented by. Except that simply replacing base->obj->size with base->size won't make the code more correct as the C language doesn't enforce a particular ordering for the evaluation of needed arguments for a function call, hence base->size could be pushed on the stack before get_base_data() which initializes base->size is called. Signed-off-by: Nicolas Pitre <nico@cam.org> Tested-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'index-pack.c')
-rw-r--r--index-pack.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/index-pack.c b/index-pack.c
index 9def641..f109a00 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -514,15 +514,14 @@ static void *get_base_data(struct base_data *c)
static void resolve_delta(struct object_entry *delta_obj,
struct base_data *base, struct base_data *result)
{
- void *delta_data;
- unsigned long delta_size;
+ void *base_data, *delta_data;
- delta_obj->real_type = base->obj->type;
+ delta_obj->real_type = base->obj->real_type;
delta_data = get_data_from_pack(delta_obj);
- delta_size = delta_obj->size;
+ base_data = get_base_data(base);
result->obj = delta_obj;
- result->data = patch_delta(get_base_data(base), base->obj->size,
- delta_data, delta_size, &result->size);
+ result->data = patch_delta(base_data, base->size,
+ delta_data, delta_obj->size, &result->size);
free(delta_data);
if (!result->data)
bad_object(delta_obj->idx.offset, "failed to apply delta");