diff options
author | Derrick Stolee <dstolee@microsoft.com> | 2021-02-18 17:07:24 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2021-02-19 00:38:16 +0300 |
commit | 570df42610a971b80046846d7f262007bec23dd6 (patch) | |
tree | 383b8bb465bcf7c08377cd04f7b70c99f01903dc /chunk-format.h | |
parent | eb9071912f5ca370d7e30e88434ffa10c182ed81 (diff) |
chunk-format: create chunk format write API
In anticipation of combining the logic from the commit-graph and
multi-pack-index file formats, create a new chunk-format API. Use a
'struct chunkfile' pointer to keep track of data that has been
registered for writes. This struct is anonymous outside of
chunk-format.c to ensure no user attempts to interfere with the data.
The next change will use this API in commit-graph.c, but the general
approach is:
1. initialize the chunkfile with init_chunkfile(f).
2. add chunks in the intended writing order with add_chunk().
3. write any header information to the hashfile f.
4. write the chunkfile data using write_chunkfile().
5. free the chunkfile struct using free_chunkfile().
Helped-by: Taylor Blau <me@ttaylorr.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'chunk-format.h')
-rw-r--r-- | chunk-format.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/chunk-format.h b/chunk-format.h new file mode 100644 index 00000000000..ce598b66d9f --- /dev/null +++ b/chunk-format.h @@ -0,0 +1,21 @@ +#ifndef CHUNK_FORMAT_H +#define CHUNK_FORMAT_H + +#include "git-compat-util.h" + +struct hashfile; +struct chunkfile; + +#define CHUNK_TOC_ENTRY_SIZE (sizeof(uint32_t) + sizeof(uint64_t)) + +struct chunkfile *init_chunkfile(struct hashfile *f); +void free_chunkfile(struct chunkfile *cf); +int get_num_chunks(struct chunkfile *cf); +typedef int (*chunk_write_fn)(struct hashfile *f, void *data); +void add_chunk(struct chunkfile *cf, + uint32_t id, + size_t size, + chunk_write_fn fn); +int write_chunkfile(struct chunkfile *cf, void *data); + +#endif |