midx.h

   1 #ifndef MIDX_H
   2 #define MIDX_H
   3
   4 #include "repository.h"
   5 #include "string-list.h"
   6
   7 struct object_id;
   8 struct pack_entry;
   9 struct repository;
  10 struct bitmapped_pack;
  11
  12 #define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
  13 #define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
  14         "GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
  15
  16 struct multi_pack_index {
  17         struct multi_pack_index *next;
  18
  19         const unsigned char *data;
  20         size_t data_len;
  21
  22         const uint32_t *revindex_data;
  23         const uint32_t *revindex_map;
  24         size_t revindex_len;
  25
  26         uint32_t signature;
  27         unsigned char version;
  28         unsigned char hash_len;
  29         unsigned char num_chunks;
  30         uint32_t num_packs;
  31         uint32_t num_objects;
  32         int preferred_pack_idx;
  33
  34         int local;
  35
  36         const unsigned char *chunk_pack_names;
  37         size_t chunk_pack_names_len;
  38         const uint32_t *chunk_bitmapped_packs;
  39         size_t chunk_bitmapped_packs_len;
  40         const uint32_t *chunk_oid_fanout;
  41         const unsigned char *chunk_oid_lookup;
  42         const unsigned char *chunk_object_offsets;
  43         const unsigned char *chunk_large_offsets;
  44         size_t chunk_large_offsets_len;
  45         const unsigned char *chunk_revindex;
  46         size_t chunk_revindex_len;
  47
  48         const char **pack_names;
  49         struct packed_git **packs;
  50         char object_dir[FLEX_ARRAY];
  51 };
  52
  53 #define MIDX_PROGRESS     (1 << 0)
  54 #define MIDX_WRITE_REV_INDEX (1 << 1)
  55 #define MIDX_WRITE_BITMAP (1 << 2)
  56 #define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
  57 #define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
  58
  59 const unsigned char *get_midx_checksum(struct multi_pack_index *m);
  60 void get_midx_filename(struct strbuf *out, const char *object_dir);
  61 void get_midx_rev_filename(struct strbuf *out, struct multi_pack_index *m);
  62
  63 struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
  64 int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
  65 int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m,
  66                        struct bitmapped_pack *bp, uint32_t pack_int_id);
  67 int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
  68 off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
  69 uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
  70 struct object_id *nth_midxed_object_oid(struct object_id *oid,
  71                                         struct multi_pack_index *m,
  72                                         uint32_t n);
  73 int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
  74 int midx_contains_pack(struct multi_pack_index *m,
  75                        const char *idx_or_pack_name);
  76 int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name,
  77                      uint32_t *pos);
  78 int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id);
  79 int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
  80
  81 /*
  82  * Variant of write_midx_file which writes a MIDX containing only the packs
  83  * specified in packs_to_include.
  84  */
  85 int write_midx_file(const char *object_dir,
  86                     const char *preferred_pack_name,
  87                     const char *refs_snapshot,
  88                     unsigned flags);
  89 int write_midx_file_only(const char *object_dir,
  90                          struct string_list *packs_to_include,
  91                          const char *preferred_pack_name,
  92                          const char *refs_snapshot,
  93                          unsigned flags);
  94 void clear_midx_file(struct repository *r);
  95 int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
  96 int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
  97 int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
  98
  99 void close_midx(struct multi_pack_index *m);
 100
 101 #endif