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reftable: generic interface to tables

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Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Han-Wen Nienhuys
2021-10-07 20:25:07 +00:00
committed by Junio C Hamano
parent f14bd71934
commit 17df8dbeba
6 changed files with 405 additions and 0 deletions
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reftable/reftable-generic.h Normal file
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/*
Copyright 2020 Google LLC
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://developers.google.com/open-source/licenses/bsd
*/
#ifndef REFTABLE_GENERIC_H
#define REFTABLE_GENERIC_H
#include "reftable-iterator.h"
struct reftable_table_vtable;
/*
* Provides a unified API for reading tables, either merged tables, or single
* readers. */
struct reftable_table {
struct reftable_table_vtable *ops;
void *table_arg;
};
int reftable_table_seek_log(struct reftable_table *tab,
struct reftable_iterator *it, const char *name);
int reftable_table_seek_ref(struct reftable_table *tab,
struct reftable_iterator *it, const char *name);
/* returns the hash ID from a generic reftable_table */
uint32_t reftable_table_hash_id(struct reftable_table *tab);
/* returns the max update_index covered by this table. */
uint64_t reftable_table_max_update_index(struct reftable_table *tab);
/* returns the min update_index covered by this table. */
uint64_t reftable_table_min_update_index(struct reftable_table *tab);
/* convenience function to read a single ref. Returns < 0 for error, 0
for success, and 1 if ref not found. */
int reftable_table_read_ref(struct reftable_table *tab, const char *name,
struct reftable_ref_record *ref);
/* dump table contents onto stdout for debugging */
int reftable_table_print(struct reftable_table *tab);
#endif