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 struct bitmapped_pack;
  10
  11 #define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
  12 #define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
  13         "GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
  14
  15 struct multi_pack_index {
  16         struct multi_pack_index *next;
  17
  18         const unsigned char *data;
  19         size_t data_len;
  20
  21         const uint32_t *revindex_data;
  22         const uint32_t *revindex_map;
  23         size_t revindex_len;
  24
  25         uint32_t signature;
  26         unsigned char version;
  27         unsigned char hash_len;
  28         unsigned char num_chunks;
  29         uint32_t num_packs;
  30         uint32_t num_objects;
  31         int preferred_pack_idx;
  32
  33         int local;
  34
  35         const unsigned char *chunk_pack_names;
  36         size_t chunk_pack_names_len;
  37         const uint32_t *chunk_bitmapped_packs;
  38         size_t chunk_bitmapped_packs_len;
  39         const uint32_t *chunk_oid_fanout;
  40         const unsigned char *chunk_oid_lookup;
  41         const unsigned char *chunk_object_offsets;
  42         const unsigned char *chunk_large_offsets;
  43         size_t chunk_large_offsets_len;
  44         const unsigned char *chunk_revindex;
  45         size_t chunk_revindex_len;
  46
  47         const char **pack_names;
  48         struct packed_git **packs;
  49         char object_dir[FLEX_ARRAY];
  50 };
  51
  52 #define MIDX_PROGRESS     (1 << 0)
  53 #define MIDX_WRITE_REV_INDEX (1 << 1)
  54 #define MIDX_WRITE_BITMAP (1 << 2)
  55 #define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
  56 #define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
  57
  58 const unsigned char *get_midx_checksum(struct multi_pack_index *m);
  59 void get_midx_filename(struct strbuf *out, const char *object_dir);
  60 void get_midx_rev_filename(struct strbuf *out, struct multi_pack_index *m);
  61
  62 struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
  63 int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
  64 int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m,
  65                        struct bitmapped_pack *bp, uint32_t pack_int_id);
  66 int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
  67 off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
  68 uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
  69 struct object_id *nth_midxed_object_oid(struct object_id *oid,
  70                                         struct multi_pack_index *m,
  71                                         uint32_t n);
  72 int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
  73 int midx_contains_pack(struct multi_pack_index *m,
  74                        const char *idx_or_pack_name);
  75 int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name,
  76                      uint32_t *pos);
  77 int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id);
  78 int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
  79
  80 /*
  81  * Variant of write_midx_file which writes a MIDX containing only the packs
  82  * specified in packs_to_include.
  83  */
  84 int write_midx_file(const char *object_dir,
  85                     const char *preferred_pack_name,
  86                     const char *refs_snapshot,
  87                     unsigned flags);
  88 int write_midx_file_only(const char *object_dir,
  89                          struct string_list *packs_to_include,
  90                          const char *preferred_pack_name,
  91                          const char *refs_snapshot,
  92                          unsigned flags);
  93 void clear_midx_file(struct repository *r);
  94 int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
  95 int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
  96 int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
  97
  98 void close_midx(struct multi_pack_index *m);
  99
 100 #endif