diff options
Diffstat (limited to 'reftable/block.c')
| -rw-r--r-- | reftable/block.c | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/reftable/block.c b/reftable/block.c index c6c4a68ea1..3e87460cba 100644 --- a/reftable/block.c +++ b/reftable/block.c @@ -365,16 +365,6 @@ static int restart_needle_less(size_t idx, void *_args) return args->needle.len < suffix_len; } -void block_iter_copy_from(struct block_iter *dest, const struct block_iter *src) -{ - dest->block = src->block; - dest->block_len = src->block_len; - dest->hash_size = src->hash_size; - dest->next_off = src->next_off; - strbuf_reset(&dest->last_key); - strbuf_addbuf(&dest->last_key, &src->last_key); -} - int block_iter_next(struct block_iter *it, struct reftable_record *rec) { struct string_view in = { @@ -427,7 +417,6 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, .needle = *want, .reader = br, }; - struct block_iter next = BLOCK_ITER_INIT; struct reftable_record rec; int err = 0; size_t i; @@ -486,11 +475,13 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, * far and then back up. */ while (1) { - block_iter_copy_from(&next, it); - err = block_iter_next(&next, &rec); + size_t prev_off = it->next_off; + + err = block_iter_next(it, &rec); if (err < 0) goto done; if (err > 0) { + it->next_off = prev_off; err = 0; goto done; } @@ -501,18 +492,23 @@ int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, * record does not exist in the block and can thus abort early. * In case it is equal to the sought-after key we have found * the desired record. + * + * Note that we store the next record's key record directly in + * `last_key` without restoring the key of the preceding record + * in case we need to go one record back. This is safe to do as + * `block_iter_next()` would return the ref whose key is equal + * to `last_key` now, and naturally all keys share a prefix + * with themselves. */ reftable_record_key(&rec, &it->last_key); - if (strbuf_cmp(&it->last_key, want) >= 0) + if (strbuf_cmp(&it->last_key, want) >= 0) { + it->next_off = prev_off; goto done; - - block_iter_copy_from(it, &next); + } } done: - block_iter_close(&next); reftable_record_release(&rec); - return err; } |