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5575c713c2
The reftable library is now prepared to expect that the memory allocation function given to it may fail to allocate and to deal with such an error. * ps/reftable-alloc-failures: (26 commits) reftable/basics: fix segfault when growing `names` array fails reftable/basics: ban standard allocator functions reftable: introduce `REFTABLE_FREE_AND_NULL()` reftable: fix calls to free(3P) reftable: handle trivial allocation failures reftable/tree: handle allocation failures reftable/pq: handle allocation failures when adding entries reftable/block: handle allocation failures reftable/blocksource: handle allocation failures reftable/iter: handle allocation failures when creating indexed table iter reftable/stack: handle allocation failures in auto compaction reftable/stack: handle allocation failures in `stack_compact_range()` reftable/stack: handle allocation failures in `reftable_new_stack()` reftable/stack: handle allocation failures on reload reftable/reader: handle allocation failures in `reader_init_iter()` reftable/reader: handle allocation failures for unindexed reader reftable/merged: handle allocation failures in `merged_table_init_iter()` reftable/writer: handle allocation failures in `reftable_new_writer()` reftable/writer: handle allocation failures in `writer_index_hash()` reftable/record: handle allocation failures when decoding records ...
67 lines
1.7 KiB
C
67 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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/* '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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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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