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index-pack: abstract away hash function constant

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The code for reading certain pack v2 offsets had a hard-coded 5
representing the number of uint32_t words that we needed to skip over.
Specify this value in terms of a value from the_hash_algo.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2018-05-02 00:25:46 +00:00 committed by Junio C Hamano
parent 6390fe20eb
commit 5d9e198245
1 changed files with 2 additions and 1 deletions
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3
builtin/index-pack.c
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@ -1543,12 +1543,13 @@ static void read_v2_anomalous_offsets(struct packed_git *p,
{
const uint32_t *idx1, *idx2;
uint32_t i;
const uint32_t hashwords = the_hash_algo->rawsz / sizeof(uint32_t);
/* The address of the 4-byte offset table */
idx1 = (((const uint32_t *)p->index_data)
+ 2 /* 8-byte header */
+ 256 /* fan out */
+ 5 * p->num_objects /* 20-byte SHA-1 table */
+ hashwords * p->num_objects /* object ID table */
+ p->num_objects /* CRC32 table */
);