Object header in a pack is packed really tight (see
pack-format.txt). Even with 8 bytes length, we need 9-10 bytes most,
plus a hash (20 bytes). Which means this field only needs to store a
number as big as 32 (5 bits).
This is trickier to pack tight though since a new hash algorithm is
coming, the number of bits needed may quickly increase. So leave it
for now.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
pack-objects.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/pack-objects.h b/pack-objects.h
index 3941e6c9a6..017cc3425f 100644
--- a/pack-objects.h
+++ b/pack-objects.h
@@ -32,7 +32,7 @@ struct object_entry {
unsigned long z_delta_size; /* delta data size (compressed) */
uint32_t hash; /* name hint hash */
unsigned int in_pack_pos;
- unsigned char in_pack_header_size;
+ unsigned char in_pack_header_size; /* note: spare bits available! */
unsigned type:TYPE_BITS;
unsigned in_pack_type:TYPE_BITS; /* could be delta */
unsigned preferred_base:1; /*
--
2.16.1.435.g8f24da2e1a
