hash: require hash algorithm in `is_empty_{blob,tree}_oid()`

Both functions `is_empty_{blob,tree}_oid()` use `the_repository` to derive the hash function that shall be used. Require callers to pass in the hash algorithm to get rid of this implicit dependency. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Patrick Steinhardt committed Jun 14, 2024 at 08:50 UTC 9c34eb93fba703e74f06d20f5b36a1a5e3dc6486
6 files changed +19 -15
builtin/fast-import.c
+3 -1
@@ -2361,7 +2361,9 @@ static void file_change_m(const char *p, struct branch *b)
2361 parse_path_eol(&path, p, "path");
2362
2363 /* Git does not track empty, non-toplevel directories. */
2364 - if (S_ISDIR(mode) && is_empty_tree_oid(&oid) && *path.buf) {
2364 + if (S_ISDIR(mode) &&
2365 + is_empty_tree_oid(&oid, the_repository->hash_algo) &&
2366 + *path.buf) {
2367 tree_content_remove(&b->branch_tree, path.buf, NULL, 0);
2368 return;
2369 }
cache-tree.c
+1 -1
@@ -422,7 +422,7 @@ static int update_one(struct cache_tree *it,
422 /*
423 * "sub" can be an empty tree if all subentries are i-t-a.
424 */
425 - if (contains_ita && is_empty_tree_oid(oid))
425 + if (contains_ita && is_empty_tree_oid(oid, the_repository->hash_algo))
426 continue;
427
428 strbuf_grow(&buffer, entlen + 100);
diffcore-rename.c
+2 -2
@@ -1422,7 +1422,7 @@ void diffcore_rename_extended(struct diff_options *options,
1422 strcmp(options->single_follow, p->two->path))
1423 continue; /* not interested */
1424 else if (!options->flags.rename_empty &&
1425 - is_empty_blob_oid(&p->two->oid))
1425 + is_empty_blob_oid(&p->two->oid, the_repository->hash_algo))
1426 continue;
1427 else if (add_rename_dst(p) < 0) {
1428 warning("skipping rename detection, detected"
@@ -1432,7 +1432,7 @@ void diffcore_rename_extended(struct diff_options *options,
1432 }
1433 }
1434 else if (!options->flags.rename_empty &&
1435 - is_empty_blob_oid(&p->one->oid))
1435 + is_empty_blob_oid(&p->one->oid, the_repository->hash_algo))
1436 continue;
1437 else if (!DIFF_PAIR_UNMERGED(p) && !DIFF_FILE_VALID(p->two)) {
1438 /*
hash-ll.h
+12
@@ -350,4 +350,16 @@ static inline int is_null_oid(const struct object_id *oid)
350 const char *empty_tree_oid_hex(void);
351 const char *empty_blob_oid_hex(void);
352
353 +static inline int is_empty_blob_oid(const struct object_id *oid,
354 + const struct git_hash_algo *algop)
355 +{
356 + return oideq(oid, algop->empty_blob);
357 +}
358 +
359 +static inline int is_empty_tree_oid(const struct object_id *oid,
360 + const struct git_hash_algo *algop)
361 +{
362 + return oideq(oid, algop->empty_tree);
363 +}
364 +
365 #endif
hash.h
-10
@@ -6,14 +6,4 @@
6
7 #define the_hash_algo the_repository->hash_algo
8
9 -static inline int is_empty_blob_oid(const struct object_id *oid)
10 -{
11 - return oideq(oid, the_hash_algo->empty_blob);
12 -}
13 -
14 -static inline int is_empty_tree_oid(const struct object_id *oid)
15 -{
16 - return oideq(oid, the_hash_algo->empty_tree);
17 -}
18 -
9 #endif
read-cache.c
+1 -1
@@ -337,7 +337,7 @@ static int ce_match_stat_basic(const struct cache_entry *ce, struct stat *st)
337
338 /* Racily smudged entry? */
339 if (!ce->ce_stat_data.sd_size) {
340 - if (!is_empty_blob_oid(&ce->oid))
340 + if (!is_empty_blob_oid(&ce->oid, the_repository->hash_algo))
341 changed |= DATA_CHANGED;
342 }
343