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64 lines
1.7 KiB
64 lines
1.7 KiB
/* |
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Copyright 2020 Google LLC |
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Use of this source code is governed by a BSD-style |
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license that can be found in the LICENSE file or at |
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https://developers.google.com/open-source/licenses/bsd |
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*/ |
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#ifndef READER_H |
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#define READER_H |
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#include "block.h" |
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#include "record.h" |
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#include "reftable-iterator.h" |
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#include "reftable-reader.h" |
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uint64_t block_source_size(struct reftable_block_source *source); |
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int block_source_read_block(struct reftable_block_source *source, |
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struct reftable_block *dest, uint64_t off, |
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uint32_t size); |
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void block_source_close(struct reftable_block_source *source); |
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/* metadata for a block type */ |
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struct reftable_reader_offsets { |
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int is_present; |
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uint64_t offset; |
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uint64_t index_offset; |
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}; |
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/* The state for reading a reftable file. */ |
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struct reftable_reader { |
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/* for convience, associate a name with the instance. */ |
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char *name; |
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struct reftable_block_source source; |
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/* Size of the file, excluding the footer. */ |
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uint64_t size; |
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/* 'sha1' for SHA1, 's256' for SHA-256 */ |
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uint32_t hash_id; |
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uint32_t block_size; |
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uint64_t min_update_index; |
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uint64_t max_update_index; |
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/* Length of the OID keys in the 'o' section */ |
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int object_id_len; |
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int version; |
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struct reftable_reader_offsets ref_offsets; |
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struct reftable_reader_offsets obj_offsets; |
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struct reftable_reader_offsets log_offsets; |
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}; |
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int init_reader(struct reftable_reader *r, struct reftable_block_source *source, |
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const char *name); |
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void reader_close(struct reftable_reader *r); |
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const char *reader_name(struct reftable_reader *r); |
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/* initialize a block reader to read from `r` */ |
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int reader_init_block_reader(struct reftable_reader *r, struct block_reader *br, |
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uint64_t next_off, uint8_t want_typ); |
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#endif
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