mirror of
https://github.com/git/git
synced 2024-11-05 18:59:29 +00:00
748b88a021
Introduce a new midx-write.c source file, which holds all of the functionality from the MIDX sub-system related to writing new MIDX files. Similar to the relationship between "pack-bitmap.c" and "pack-bitmap-write.c", this source file will hold code that is specific to writing MIDX files as opposed to reading them (the latter will remain in midx.c). Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
119 lines
4.2 KiB
C
119 lines
4.2 KiB
C
#ifndef MIDX_H
|
|
#define MIDX_H
|
|
|
|
#include "string-list.h"
|
|
|
|
struct object_id;
|
|
struct pack_entry;
|
|
struct repository;
|
|
struct bitmapped_pack;
|
|
|
|
#define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */
|
|
#define MIDX_VERSION 1
|
|
#define MIDX_BYTE_FILE_VERSION 4
|
|
#define MIDX_BYTE_HASH_VERSION 5
|
|
#define MIDX_BYTE_NUM_CHUNKS 6
|
|
#define MIDX_BYTE_NUM_PACKS 8
|
|
#define MIDX_HEADER_SIZE 12
|
|
|
|
#define MIDX_CHUNK_ALIGNMENT 4
|
|
#define MIDX_CHUNKID_PACKNAMES 0x504e414d /* "PNAM" */
|
|
#define MIDX_CHUNKID_BITMAPPEDPACKS 0x42544d50 /* "BTMP" */
|
|
#define MIDX_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
|
|
#define MIDX_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */
|
|
#define MIDX_CHUNKID_OBJECTOFFSETS 0x4f4f4646 /* "OOFF" */
|
|
#define MIDX_CHUNKID_LARGEOFFSETS 0x4c4f4646 /* "LOFF" */
|
|
#define MIDX_CHUNKID_REVINDEX 0x52494458 /* "RIDX" */
|
|
#define MIDX_CHUNK_OFFSET_WIDTH (2 * sizeof(uint32_t))
|
|
#define MIDX_LARGE_OFFSET_NEEDED 0x80000000
|
|
|
|
#define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
|
|
#define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
|
|
"GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
|
|
|
|
struct multi_pack_index {
|
|
struct multi_pack_index *next;
|
|
|
|
const unsigned char *data;
|
|
size_t data_len;
|
|
|
|
const uint32_t *revindex_data;
|
|
const uint32_t *revindex_map;
|
|
size_t revindex_len;
|
|
|
|
uint32_t signature;
|
|
unsigned char version;
|
|
unsigned char hash_len;
|
|
unsigned char num_chunks;
|
|
uint32_t num_packs;
|
|
uint32_t num_objects;
|
|
int preferred_pack_idx;
|
|
|
|
int local;
|
|
|
|
const unsigned char *chunk_pack_names;
|
|
size_t chunk_pack_names_len;
|
|
const uint32_t *chunk_bitmapped_packs;
|
|
size_t chunk_bitmapped_packs_len;
|
|
const uint32_t *chunk_oid_fanout;
|
|
const unsigned char *chunk_oid_lookup;
|
|
const unsigned char *chunk_object_offsets;
|
|
const unsigned char *chunk_large_offsets;
|
|
size_t chunk_large_offsets_len;
|
|
const unsigned char *chunk_revindex;
|
|
size_t chunk_revindex_len;
|
|
|
|
const char **pack_names;
|
|
struct packed_git **packs;
|
|
char object_dir[FLEX_ARRAY];
|
|
};
|
|
|
|
#define MIDX_PROGRESS (1 << 0)
|
|
#define MIDX_WRITE_REV_INDEX (1 << 1)
|
|
#define MIDX_WRITE_BITMAP (1 << 2)
|
|
#define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
|
|
#define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
|
|
|
|
const unsigned char *get_midx_checksum(struct multi_pack_index *m);
|
|
void get_midx_filename(struct strbuf *out, const char *object_dir);
|
|
void get_midx_rev_filename(struct strbuf *out, struct multi_pack_index *m);
|
|
|
|
struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
|
|
int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
|
|
int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m,
|
|
struct bitmapped_pack *bp, uint32_t pack_int_id);
|
|
int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
|
|
off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
|
|
uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
|
|
struct object_id *nth_midxed_object_oid(struct object_id *oid,
|
|
struct multi_pack_index *m,
|
|
uint32_t n);
|
|
int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
|
|
int midx_contains_pack(struct multi_pack_index *m,
|
|
const char *idx_or_pack_name);
|
|
int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name,
|
|
uint32_t *pos);
|
|
int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id);
|
|
int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
|
|
|
|
/*
|
|
* Variant of write_midx_file which writes a MIDX containing only the packs
|
|
* specified in packs_to_include.
|
|
*/
|
|
int write_midx_file(const char *object_dir,
|
|
const char *preferred_pack_name,
|
|
const char *refs_snapshot,
|
|
unsigned flags);
|
|
int write_midx_file_only(const char *object_dir,
|
|
struct string_list *packs_to_include,
|
|
const char *preferred_pack_name,
|
|
const char *refs_snapshot,
|
|
unsigned flags);
|
|
void clear_midx_file(struct repository *r);
|
|
int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
|
|
int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
|
|
int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
|
|
|
|
void close_midx(struct multi_pack_index *m);
|
|
|
|
#endif
|