c2f08236ed
We include "hash.h" in "reftable/system.h" such that we can use hash format IDs as well as the raw size of SHA1 and SHA256. As we are in the process of converting the reftable library to become standalone we of course cannot rely on those constants anymore. Introduce a new `enum reftable_hash` to replace internal uses of the hash format IDs and new constants that replace internal uses of the hash size. Adapt the reftable backend to set up the correct hash function. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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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 convenience, 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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/* The hash function used for ref records. */
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enum reftable_hash 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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uint64_t refcount;
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};
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const char *reader_name(struct reftable_reader *r);
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int reader_init_iter(struct reftable_reader *r,
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struct reftable_iterator *it,
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uint8_t typ);
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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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