diff options
Diffstat (limited to 'pack-write.c')
| -rw-r--r-- | pack-write.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/pack-write.c b/pack-write.c index 741efcd93b..a905ca4486 100644 --- a/pack-write.c +++ b/pack-write.c @@ -17,8 +17,8 @@ static int sha1_compare(const void *_a, const void *_b) * the SHA1 hash of sorted object names. The objects array passed in * will be sorted by SHA1 on exit. */ -char *write_idx_file(char *index_name, struct pack_idx_entry **objects, - int nr_objects, unsigned char *sha1) +const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, + int nr_objects, unsigned char *sha1) { struct sha1file *f; struct pack_idx_entry **sorted_by_sha, **list, **last; @@ -253,3 +253,30 @@ char *index_pack_lockfile(int ip_out) } return NULL; } + +/* + * The per-object header is a pretty dense thing, which is + * - first byte: low four bits are "size", then three bits of "type", + * and the high bit is "size continues". + * - each byte afterwards: low seven bits are size continuation, + * with the high bit being "size continues" + */ +int encode_in_pack_object_header(enum object_type type, uintmax_t size, unsigned char *hdr) +{ + int n = 1; + unsigned char c; + + if (type < OBJ_COMMIT || type > OBJ_REF_DELTA) + die("bad type %d", type); + + c = (type << 4) | (size & 15); + size >>= 4; + while (size) { + *hdr++ = c | 0x80; + c = size & 0x7f; + size >>= 7; + n++; + } + *hdr = c; + return n; +} |