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
  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
  32         int local;
  33
  34         const unsigned char *chunk_pack_names;
  35         size_t chunk_pack_names_len;
  36         const uint32_t *chunk_oid_fanout;
  37         const unsigned char *chunk_oid_lookup;
  38         const unsigned char *chunk_object_offsets;
  39         const unsigned char *chunk_large_offsets;
  40         size_t chunk_large_offsets_len;
  41         const unsigned char *chunk_revindex;
  42         size_t chunk_revindex_len;
  43
  44         const char **pack_names;
  45         struct packed_git **packs;
  46         char object_dir[FLEX_ARRAY];
  47 };
  48
  49 #define MIDX_PROGRESS     (1 << 0)
  50 #define MIDX_WRITE_REV_INDEX (1 << 1)
  51 #define MIDX_WRITE_BITMAP (1 << 2)
  52 #define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
  53 #define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
  54
  55 const unsigned char *get_midx_checksum(struct multi_pack_index *m);
  56 void get_midx_filename(struct strbuf *out, const char *object_dir);
  57 void get_midx_rev_filename(struct strbuf *out, struct multi_pack_index *m);
  58
  59 struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
  60 int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
  61 int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
  62 off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos);
  63 uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos);
  64 struct object_id *nth_midxed_object_oid(struct object_id *oid,
  65                                         struct multi_pack_index *m,
  66                                         uint32_t n);
  67 int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
  68 int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name);
  69 int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
  70
  71 /*
  72  * Variant of write_midx_file which writes a MIDX containing only the packs
  73  * specified in packs_to_include.
  74  */
  75 int write_midx_file(const char *object_dir,
  76                     const char *preferred_pack_name,
  77                     const char *refs_snapshot,
  78                     unsigned flags);
  79 int write_midx_file_only(const char *object_dir,
  80                          struct string_list *packs_to_include,
  81                          const char *preferred_pack_name,
  82                          const char *refs_snapshot,
  83                          unsigned flags);
  84 void clear_midx_file(struct repository *r);
  85 int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags);
  86 int expire_midx_packs(struct repository *r, const char *object_dir, unsigned flags);
  87 int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags);
  88
  89 void close_midx(struct multi_pack_index *m);
  90
  91 #endif