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oidset: introduce oidset_equal()

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Introduce a new function that allows the caller to verify whether two
oidsets contain the exact same object IDs.

Note that this change requires us to change `oidset_iter_init()` to
accept a `const struct oidset`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2025-11-19 08:50:54 +01:00
committed by Junio C Hamano
parent b67b2d9fb7
commit 5d795b34dc
2 changed files with 23 additions and 2 deletions
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16
oidset.c
View File

@@ -16,6 +16,22 @@ int oidset_contains(const struct oidset *set, const struct object_id *oid)
return pos != kh_end(&set->set);
}
bool oidset_equal(const struct oidset *a, const struct oidset *b)
{
struct oidset_iter iter;
struct object_id *a_oid;
if (oidset_size(a) != oidset_size(b))
return false;
oidset_iter_init(a, &iter);
while ((a_oid = oidset_iter_next(&iter)))
if (!oidset_contains(b, a_oid))
return false;
return true;
}
int oidset_insert(struct oidset *set, const struct object_id *oid)
{
int added;

9
oidset.h
View File

@@ -38,6 +38,11 @@ void oidset_init(struct oidset *set, size_t initial_size);
*/
int oidset_contains(const struct oidset *set, const struct object_id *oid);
/**
* Returns true iff `a` and `b` contain the exact same OIDs.
*/
bool oidset_equal(const struct oidset *a, const struct oidset *b);
/**
* Insert the oid into the set; a copy is made, so "oid" does not need
* to persist after this function is called.
@@ -94,11 +99,11 @@ void oidset_parse_file_carefully(struct oidset *set, const char *path,
oidset_parse_tweak_fn fn, void *cbdata);
struct oidset_iter {
kh_oid_set_t *set;
const kh_oid_set_t *set;
khiter_t iter;
};
static inline void oidset_iter_init(struct oidset *set,
static inline void oidset_iter_init(const struct oidset *set,
struct oidset_iter *iter)
{
iter->set = &set->set;