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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-20 05:14:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-20 05:14:36 +0000 |
commit | 09f61306ecfdf0e532c58460d8d868d50021e7db (patch) | |
tree | b6f46cb23ce41cddcb6e1320d5c1c4bd5d69e899 /reftable/block.h | |
parent | Adding debian version 1:2.43.0-1. (diff) | |
download | git-09f61306ecfdf0e532c58460d8d868d50021e7db.tar.xz git-09f61306ecfdf0e532c58460d8d868d50021e7db.zip |
Merging upstream version 1:2.45.1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'reftable/block.h')
-rw-r--r-- | reftable/block.h | 51 |
1 files changed, 33 insertions, 18 deletions
diff --git a/reftable/block.h b/reftable/block.h index 87c7753..ea4384a 100644 --- a/reftable/block.h +++ b/reftable/block.h @@ -56,6 +56,8 @@ int block_writer_finish(struct block_writer *w); /* clears out internally allocated block_writer members. */ void block_writer_release(struct block_writer *bw); +struct z_stream; + /* Read a block. */ struct block_reader { /* offset of the block header; nonzero for the first block in a @@ -66,6 +68,11 @@ struct block_reader { struct reftable_block block; int hash_size; + /* Uncompressed data for log entries. */ + z_stream *zstream; + unsigned char *uncompressed_data; + size_t uncompressed_cap; + /* size of the data, excluding restart data. */ uint32_t block_len; uint8_t *restart_bytes; @@ -76,41 +83,49 @@ struct block_reader { uint32_t full_block_size; }; +/* initializes a block reader. */ +int block_reader_init(struct block_reader *br, struct reftable_block *bl, + uint32_t header_off, uint32_t table_block_size, + int hash_size); + +void block_reader_release(struct block_reader *br); + +/* Returns the block type (eg. 'r' for refs) */ +uint8_t block_reader_type(const struct block_reader *r); + +/* Decodes the first key in the block */ +int block_reader_first_key(const struct block_reader *br, struct strbuf *key); + /* Iterate over entries in a block */ struct block_iter { /* offset within the block of the next entry to read. */ uint32_t next_off; - struct block_reader *br; + const unsigned char *block; + size_t block_len; + int hash_size; /* key for last entry we read. */ struct strbuf last_key; + struct strbuf scratch; }; -/* initializes a block reader. */ -int block_reader_init(struct block_reader *br, struct reftable_block *bl, - uint32_t header_off, uint32_t table_block_size, - int hash_size); +#define BLOCK_ITER_INIT { \ + .last_key = STRBUF_INIT, \ + .scratch = STRBUF_INIT, \ +} /* Position `it` at start of the block */ -void block_reader_start(struct block_reader *br, struct block_iter *it); +void block_iter_seek_start(struct block_iter *it, const struct block_reader *br); /* Position `it` to the `want` key in the block */ -int block_reader_seek(struct block_reader *br, struct block_iter *it, - struct strbuf *want); - -/* Returns the block type (eg. 'r' for refs) */ -uint8_t block_reader_type(struct block_reader *r); - -/* Decodes the first key in the block */ -int block_reader_first_key(struct block_reader *br, struct strbuf *key); - -void block_iter_copy_from(struct block_iter *dest, struct block_iter *src); +int block_iter_seek_key(struct block_iter *it, const struct block_reader *br, + struct strbuf *want); /* return < 0 for error, 0 for OK, > 0 for EOF. */ int block_iter_next(struct block_iter *it, struct reftable_record *rec); -/* Seek to `want` with in the block pointed to by `it` */ -int block_iter_seek(struct block_iter *it, struct strbuf *want); +/* Reset the block iterator to pristine state without releasing its memory. */ +void block_iter_reset(struct block_iter *it); /* deallocate memory for `it`. The block reader and its block is left intact. */ void block_iter_close(struct block_iter *it); |