/* * 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_BLOCK_H #define REFTABLE_BLOCK_H #include #include "reftable-basics.h" #include "reftable-blocksource.h" #include "reftable-iterator.h" struct z_stream_s; /* * A block part of a reftable. Contains records as well as some metadata * describing them. */ struct reftable_block { /* * Offset of the block header; nonzero for the first block in a * reftable. */ uint32_t header_off; /* The memory block. */ struct reftable_block_data block_data; uint32_t hash_size; /* Uncompressed data for log entries. */ struct z_stream_s *zstream; unsigned char *uncompressed_data; size_t uncompressed_cap; /* * Restart point data. Restart points are located after the block's * record data. */ uint16_t restart_count; uint32_t restart_off; /* * Size of the data in the file. For log blocks, this is the compressed * size. */ uint32_t full_block_size; uint8_t block_type; }; /* Initialize a reftable block from the given block source. */ int reftable_block_init(struct reftable_block *b, struct reftable_block_source *source, uint32_t offset, uint32_t header_size, uint32_t table_block_size, uint32_t hash_size, uint8_t want_type); /* Release resources allocated by the block. */ void reftable_block_release(struct reftable_block *b); /* Initialize a generic record iterator from the given block. */ int reftable_block_init_iterator(const struct reftable_block *b, struct reftable_iterator *it); /* Returns the block type (eg. 'r' for refs). */ uint8_t reftable_block_type(const struct reftable_block *b); /* Decodes the first key in the block. */ int reftable_block_first_key(const struct reftable_block *b, struct reftable_buf *key); #endif /* REFTABLE_BLOCK_H */