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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 BLOCKSOURCE_H
#define BLOCKSOURCE_H
#include "system.h"
struct reftable_block_source;
struct reftable_block;
struct reftable_buf;
/*
* Close the block source and the underlying resource. This is a no-op in case
* the block source is zero-initialized.
*/
void block_source_close(struct reftable_block_source *source);
/*
* Read a block of length `size` from the source at the given `off`.
*/
ssize_t block_source_read_block(struct reftable_block_source *source,
struct reftable_block *dest, uint64_t off,
uint32_t size);
/*
* Return the total length of the underlying resource.
*/
uint64_t block_source_size(struct reftable_block_source *source);
/*
* Return a block to its original source, releasing any resources associated
* with it.
*/
void block_source_return_block(struct reftable_block *block);
/* Create an in-memory block source for reading reftables. */
void block_source_from_buf(struct reftable_block_source *bs,
struct reftable_buf *buf);
#endif
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