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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 13:34:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 13:34:27 +0000 |
commit | 4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f (patch) | |
tree | 47c1d492e9c956c1cd2b74dbd3b9d8b0db44dc4e /reftable/reader.h | |
parent | Initial commit. (diff) | |
download | git-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.tar.xz git-4dbdc42d9e7c3968ff7f690d00680419c9b8cb0f.zip |
Adding upstream version 1:2.43.0.upstream/1%2.43.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'reftable/reader.h')
-rw-r--r-- | reftable/reader.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/reftable/reader.h b/reftable/reader.h new file mode 100644 index 0000000..e869165 --- /dev/null +++ b/reftable/reader.h @@ -0,0 +1,64 @@ +/* +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 READER_H +#define READER_H + +#include "block.h" +#include "record.h" +#include "reftable-iterator.h" +#include "reftable-reader.h" + +uint64_t block_source_size(struct reftable_block_source *source); + +int block_source_read_block(struct reftable_block_source *source, + struct reftable_block *dest, uint64_t off, + uint32_t size); +void block_source_close(struct reftable_block_source *source); + +/* metadata for a block type */ +struct reftable_reader_offsets { + int is_present; + uint64_t offset; + uint64_t index_offset; +}; + +/* The state for reading a reftable file. */ +struct reftable_reader { + /* for convience, associate a name with the instance. */ + char *name; + struct reftable_block_source source; + + /* Size of the file, excluding the footer. */ + uint64_t size; + + /* 'sha1' for SHA1, 's256' for SHA-256 */ + uint32_t hash_id; + + uint32_t block_size; + uint64_t min_update_index; + uint64_t max_update_index; + /* Length of the OID keys in the 'o' section */ + int object_id_len; + int version; + + struct reftable_reader_offsets ref_offsets; + struct reftable_reader_offsets obj_offsets; + struct reftable_reader_offsets log_offsets; +}; + +int init_reader(struct reftable_reader *r, struct reftable_block_source *source, + const char *name); +void reader_close(struct reftable_reader *r); +const char *reader_name(struct reftable_reader *r); + +/* initialize a block reader to read from `r` */ +int reader_init_block_reader(struct reftable_reader *r, struct block_reader *br, + uint64_t next_off, uint8_t want_typ); + +#endif |