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[PATCH] Finish initial cut of git-pack-object/git-unpack-object pair.

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This finishes the initial round of git-pack-object /
git-unpack-object pair.  They are now good enough to be used as
a transport medium:

 - Fix delta direction in pack-objects; the original was
   computing delta to create the base object from the object to
   be squashed, which was quite unfriendly for unpacker ;-).

 - Add a script to test the very basics.

 - Implement unpacker for both regular and deltified objects.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Junio C Hamano
2005-06-26 04:29:18 -07:00
committed by Linus Torvalds
parent d116a45a9a
commit 8ee378a0f0
3 changed files with 261 additions and 18 deletions
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6
pack-objects.c
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@@ -82,7 +82,8 @@ static void *delta_against(void *buf, unsigned long size, struct object_entry *e
if (!otherbuf)
die("unable to read %s", sha1_to_hex(entry->delta->sha1));
delta_buf = diff_delta(buf, size, otherbuf, othersize, &delta_size, ~0UL);
delta_buf = diff_delta(otherbuf, othersize,
buf, size, &delta_size, ~0UL);
if (!delta_buf || delta_size != entry->delta_size)
die("delta size changed");
free(buf);
@@ -318,7 +319,8 @@ static int try_delta(struct unpacked *cur, struct unpacked *old, unsigned max_de
max_size = size / 2 - 20;
if (cur_entry->delta)
max_size = cur_entry->delta_size-1;
delta_buf = diff_delta(cur->data, size, old->data, oldsize, &delta_size, max_size);
delta_buf = diff_delta(old->data, oldsize,
cur->data, size, &delta_size, max_size);
if (!delta_buf)
return 0;
cur_entry->delta = old_entry;