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#ifndef MIDX_H
#define MIDX_H
#include "string-list.h"
struct object_id;
struct pack_entry;
struct repository;
struct bitmapped_pack;
struct git_hash_algo;
struct odb_source;
struct strvec;
#define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */
#define MIDX_VERSION_V1 1
#define MIDX_VERSION_V2 2
#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_CHUNKID_BASE 0x42415345 /* "BASE" */
#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_INCREMENTAL \
"GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL"
struct multi_pack_index {
struct odb_source_packed *source;
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 has_chain;
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;
struct multi_pack_index *base_midx;
uint32_t num_objects_in_base;
uint32_t num_packs_in_base;
const char **pack_names;
size_t *pack_names_sorted;
struct packed_git **packs;
};
#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)
#define MIDX_WRITE_INCREMENTAL (1 << 5)
#define MIDX_WRITE_COMPACT (1 << 6)
#define MIDX_WRITE_NO_CHAIN (1 << 7)
#define MIDX_EXT_REV "rev"
#define MIDX_EXT_BITMAP "bitmap"
#define MIDX_EXT_MIDX "midx"
const char *midx_get_checksum_hex(const struct multi_pack_index *m) /* static buffer */;
const unsigned char *midx_get_checksum_hash(const struct multi_pack_index *m);
void get_midx_filename(struct odb_source_packed *source, struct strbuf *out);
void get_midx_filename_ext(struct odb_source_packed *source, struct strbuf *out,
const unsigned char *hash, const char *ext);
void get_midx_chain_dirname(struct odb_source_packed *source, struct strbuf *out);
void get_midx_chain_filename(struct odb_source_packed *source, struct strbuf *out);
void get_split_midx_filename_ext(struct odb_source_packed *source, struct strbuf *buf,
const unsigned char *hash, const char *ext);
struct multi_pack_index *get_multi_pack_index(struct odb_source_packed *source);
struct multi_pack_index *load_multi_pack_index(struct odb_source_packed *source);
int prepare_midx_pack(struct multi_pack_index *m, uint32_t pack_int_id);
struct packed_git *nth_midxed_pack(struct multi_pack_index *m,
uint32_t pack_int_id);
int nth_bitmapped_pack(struct multi_pack_index *m,
struct bitmapped_pack *bp, uint32_t pack_int_id);
int bsearch_one_midx(const struct object_id *oid, struct multi_pack_index *m,
uint32_t *result);
int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m,
uint32_t *result);
int midx_has_oid(struct multi_pack_index *m, const struct object_id *oid);
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);
/*
* Result of looking an object up in a multi-pack-index. MIDX_FILL_HIT means
* "e was filled in"; the two miss variants distinguish an object the midx does
* not know about (MIDX_FILL_MISS) from one it does know about but whose owning
* pack we can no longer open (MIDX_FILL_OWNER_UNAVAILABLE -- the signature of a
* concurrent repack having removed that pack). A known-bad (corrupt) object
* reports MIDX_FILL_MISS but also sets *bad_pack, if provided, to the owning
* pack so the caller can tell "corrupt" apart from "absent".
*/
enum midx_fill_result {
MIDX_FILL_MISS = 0,
MIDX_FILL_HIT,
MIDX_FILL_OWNER_UNAVAILABLE,
};
enum midx_fill_result midx_fill_entry(struct multi_pack_index *m,
const struct object_id *oid,
struct pack_entry *e,
struct packed_git **bad_pack);
int midx_contains_pack(struct multi_pack_index *m,
const char *idx_or_pack_name);
int midx_layer_contains_pack(struct multi_pack_index *m,
const char *idx_or_pack_name);
int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id);
int prepare_multi_pack_index_one(struct odb_source_packed *source);
/*
* Variant of write_midx_file which writes a MIDX containing only the packs
* specified in packs_to_include.
*/
int write_midx_file(struct odb_source_packed *source,
const char *preferred_pack_name, const char *refs_snapshot,
unsigned flags);
int write_midx_file_only(struct odb_source_packed *source,
struct string_list *packs_to_include,
const char *preferred_pack_name,
const char *refs_snapshot,
const char *incremental_base,
unsigned flags);
int write_midx_file_compact(struct odb_source_packed *source,
struct multi_pack_index *from,
struct multi_pack_index *to,
const char *incremental_base,
unsigned flags);
void clear_midx_file(struct repository *r);
void clear_incremental_midx_files(struct repository *r,
const struct strvec *keep_hashes);
int verify_midx_file(struct odb_source_packed *source, unsigned flags);
int expire_midx_packs(struct odb_source_packed *source, unsigned flags);
int midx_repack(struct odb_source_packed *source, size_t batch_size, unsigned flags);
void close_midx(struct multi_pack_index *m);
#endif
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