hash: provide per-algorithm null OIDs

Up until recently, object IDs did not have an algorithm member, only a
hash.  Consequently, it was possible to share one null (all-zeros)
object ID among all hash algorithms.  Now that we're going to be
handling objects from multiple hash algorithms, it's important to make
sure that all object IDs have a correct algorithm field.

Introduce a per-algorithm null OID, and add it to struct hash_algo.
Introduce a wrapper function as well, and use it everywhere we used to
use the null_oid constant.

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
2021-04-26 01:02:56 +00:00
committed by Junio C Hamano
parent 5a6dce70d7
commit 14228447c9
42 changed files with 119 additions and 95 deletions

View File

@ -1687,10 +1687,10 @@ void wt_status_get_state(struct repository *r,
if (!sequencer_get_last_command(r, &action)) {
if (action == REPLAY_PICK) {
state->cherry_pick_in_progress = 1;
oidcpy(&state->cherry_pick_head_oid, &null_oid);
oidcpy(&state->cherry_pick_head_oid, null_oid());
} else {
state->revert_in_progress = 1;
oidcpy(&state->revert_head_oid, &null_oid);
oidcpy(&state->revert_head_oid, null_oid());
}
}
if (get_detached_from)