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hash.h: provide constants for the hash IDs 

This will simplify referencing them from code that is not deeply integrated with
Git, in particular, the reftable library.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Han-Wen Nienhuys 2021-08-30 14:57:37 +00:00 committed by Junio C Hamano
parent c4203212e3
commit 27f3796ac1
2 changed files with 8 additions and 5 deletions
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6
hash.h
View File

@ -95,12 +95,18 @@ static inline void git_SHA256_Clone(git_SHA256_CTX *dst, const git_SHA256_CTX *s
/* Number of algorithms supported (including unknown). */
#define GIT_HASH_NALGOS (GIT_HASH_SHA256 + 1)
/* "sha1", big-endian */
#define GIT_SHA1_FORMAT_ID 0x73686131
/* The length in bytes and in hex digits of an object name (SHA-1 value). */
#define GIT_SHA1_RAWSZ 20
#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
/* The block size of SHA-1. */
#define GIT_SHA1_BLKSZ 64
/* "s256", big-endian */
#define GIT_SHA256_FORMAT_ID 0x73323536
/* The length in bytes and in hex digits of an object name (SHA-256 value). */
#define GIT_SHA256_RAWSZ 32
#define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ)

7
object-file.c
View File

@ -164,7 +164,6 @@ static void git_hash_unknown_final_oid(struct object_id *oid, git_hash_ctx *ctx)
BUG("trying to finalize unknown hash");
}
const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
{
NULL,
@ -183,8 +182,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
},
{
"sha1",
/* "sha1", big-endian */
0x73686131,
GIT_SHA1_FORMAT_ID,
GIT_SHA1_RAWSZ,
GIT_SHA1_HEXSZ,
GIT_SHA1_BLKSZ,
@ -199,8 +197,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
},
{
"sha256",
/* "s256", big-endian */
0x73323536,
GIT_SHA256_FORMAT_ID,
GIT_SHA256_RAWSZ,
GIT_SHA256_HEXSZ,
GIT_SHA256_BLKSZ,