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diff-delta.c: allow delta with empty blob.
author
Junio C Hamano
<junkio@cox.net>
Mon, 12 Dec 2005 20:01:52 +0000
(12:01 -0800)
committer
Junio C Hamano
<junkio@cox.net>
Mon, 12 Dec 2005 20:57:25 +0000
(12:57 -0800)
Delta computation with an empty blob used to punt and returned NULL.
This commit allows creation with empty blob; all combination of
empty->empty, empty->something, and something->empty are allowed.
Signed-off-by: Junio C Hamano <junkio@cox.net>
delta.h
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diff-delta.c
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diff --git
a/delta.h
b/delta.h
index 31d1820f80f2887d51808170fc86585ada42d42e..c6a476353f7122884cb4769685089d63c886631c 100644
(file)
--- a/
delta.h
+++ b/
delta.h
@@
-9,8
+9,8
@@
extern void *patch_delta(void *src_buf, unsigned long src_size,
void *delta_buf, unsigned long delta_size,
unsigned long *dst_size);
void *delta_buf, unsigned long delta_size,
unsigned long *dst_size);
-/* the smallest possible delta size is
4 bytes
*/
-#define DELTA_SIZE_MIN
4
+/* the smallest possible delta size is
2 bytes (empty to empty)
*/
+#define DELTA_SIZE_MIN
2
/*
* This must be called twice on the delta data buffer, first to get the
/*
* This must be called twice on the delta data buffer, first to get the
diff --git
a/diff-delta.c
b/diff-delta.c
index b2ae7b5e6c3b4aa409ccfa60f67d5c8eb1690504..cf5013896f6ea5efc35c9d7e90d076e4bf6328a5 100644
(file)
--- a/
diff-delta.c
+++ b/
diff-delta.c
@@
-213,7
+213,7
@@
void *diff_delta(void *from_buf, unsigned long from_size,
bdrecord_t *brec;
bdfile_t bdf;
bdrecord_t *brec;
bdfile_t bdf;
- if (
!from_size || !to_size ||
delta_prepare(from_buf, from_size, &bdf))
+ if (delta_prepare(from_buf, from_size, &bdf))
return NULL;
outpos = 0;
return NULL;
outpos = 0;