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>
Han-Wen Nienhuys committed
Aug 30, 2021 at 14:57 UTC
27f3796ac1f9b711fae506f63186034ed178690c
2 files changed
+8
-5
hash.h
+6
index 9e25c40e9a..5d40368f18 100644
--- a/hash.h
+++ b/hash.h
@@ -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)
object-file.c
+2
-5
index a8be899481..7bfd5e6e2e 100644
--- a/object-file.c
+++ b/object-file.c
@@ -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,