midx.h

   1 #ifndef MIDX_H
   2 #define MIDX_H
   3
   4 #include "string-list.h"
   5
   6 struct object_id;
   7 struct pack_entry;
   8 struct repository;
   9
  10 #define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
  11 #define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
  12         "GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
  13
  14 struct multi_pack_index {
  15         struct multi_pack_index *next;
  16
  17         const unsigned char *data;
  18         size_t data_len;
  19
  20         const uint32_t *revindex_data;
  21         const uint32_t *revindex_map;
  22         size_t revindex_len;
  23
  24         uint32_t signature;
  25         unsigned char version;
  26         unsigned char hash_len;
  27         unsigned char num_chunks;
  28         uint32_t num_packs;
  29         uint32_t num_objects;
  30
  31         int local;
  32
  33         const unsigned char *chunk_pack_names;
  34         size_t chunk_pack_names_len;
  35         const uint32_t *chunk_oid_fanout;
  36         const unsigned char *chunk_oid_lookup;
  37         const unsigned char *chunk_object_offsets;
  38         const unsigned char *chunk_large_offsets;
  39         size_t chunk_large_offsets_len;
  40         const unsigned char *chunk_revindex;
  41         size_t chunk_revindex_len;
  42
  43         const char **pack_names;
  44         struct packed_git **packs;
  45         char object_dir[FLEX_ARRAY];
  46 };
  47
  48 #define MIDX_PROGRESS     (1 << 0)
  49 #define MIDX_WRITE_REV_INDEX (1 << 1)
  50 #define MIDX_WRITE_BITMAP (1 << 2)
  51 #define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
  52 #define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
  53
  54 const unsigned char *get_midx_checksum(struct multi_pack_index *m);
  55 void get_midx_filename(struct strbuf *out, const char *object_dir);
  56 void get_midx_rev_filename(struct strbuf *out, struct multi_pack_index *m);
  57
  58 struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
  59 int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
  60 int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
  61 off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
  62 uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
  63 struct object_id *nth_midxed_object_oid(struct object_id *oid,
  64                                         struct multi_pack_index *m,
  65                                         uint32_t n);
  66 int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
  67 int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name);
  68 int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
  69
  70 /*
  71  * Variant of write_midx_file which writes a MIDX containing only the packs
  72  * specified in packs_to_include.
  73  */
  74 int write_midx_file(const char *object_dir,
  75                     const char *preferred_pack_name,
  76                     const char *refs_snapshot,
  77                     unsigned flags);
  78 int write_midx_file_only(const char *object_dir,
  79                          struct string_list *packs_to_include,
  80                          const char *preferred_pack_name,
  81                          const char *refs_snapshot,
  82                          unsigned flags);
  83 void clear_midx_file(struct repository *r);
  84 int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
  85 int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
  86 int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
  87
  88 void close_midx(struct multi_pack_index *m);
  89
  90 #endif