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reftable/merged: adapt interface to allow reuse of iterators

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Refactor the interfaces exposed by `struct reftable_merged_table` and
`struct merged_iter` such that they support iterator reuse. This is done
by separating initialization of the iterator and seeking on it.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2024-05-13 10:48:01 +02:00
committed by Junio C Hamano
parent 08efe69212
commit 369b84196e
4 changed files with 22 additions and 61 deletions
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15
reftable/reftable-merged.h
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@@ -36,21 +36,6 @@ int reftable_new_merged_table(struct reftable_merged_table **dest,
struct reftable_table *stack, size_t n,
uint32_t hash_id);
/* returns an iterator positioned just before 'name' */
int reftable_merged_table_seek_ref(struct reftable_merged_table *mt,
struct reftable_iterator *it,
const char *name);
/* returns an iterator for log entry, at given update_index */
int reftable_merged_table_seek_log_at(struct reftable_merged_table *mt,
struct reftable_iterator *it,
const char *name, uint64_t update_index);
/* like reftable_merged_table_seek_log_at but look for the newest entry. */
int reftable_merged_table_seek_log(struct reftable_merged_table *mt,
struct reftable_iterator *it,
const char *name);
/* returns the max update_index covered by this merged table. */
uint64_t
reftable_merged_table_max_update_index(struct reftable_merged_table *mt);