pack-bitmap.h

   1 #ifndef PACK_BITMAP_H
   2 #define PACK_BITMAP_H
   3
   4 #include "ewah/ewok.h"
   5 #include "khash.h"
   6 #include "pack-objects.h"
   7
   8 struct commit;
   9 struct repository;
  10 struct rev_info;
  11
  12 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  13
  14 struct bitmap_disk_header {
  15         char magic[ARRAY_SIZE(BITMAP_IDX_SIGNATURE)];
  16         uint16_t version;
  17         uint16_t options;
  18         uint32_t entry_count;
  19         unsigned char checksum[GIT_MAX_RAWSZ];
  20 };
  21
  22 #define NEEDS_BITMAP (1u<<22)
  23
  24 enum pack_bitmap_opts {
  25         BITMAP_OPT_FULL_DAG = 1,
  26         BITMAP_OPT_HASH_CACHE = 4,
  27 };
  28
  29 enum pack_bitmap_flags {
  30         BITMAP_FLAG_REUSE = 0x1
  31 };
  32
  33 typedef int (*show_reachable_fn)(
  34         const struct object_id *oid,
  35         enum object_type type,
  36         int flags,
  37         uint32_t hash,
  38         struct packed_git *found_pack,
  39         off_t found_offset);
  40
  41 struct bitmap_index;
  42
  43 struct bitmap_index *prepare_bitmap_git(struct repository *r);
  44 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  45                               uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  46 void traverse_bitmap_commit_list(struct bitmap_index *,
  47                                  show_reachable_fn show_reachable);
  48 void test_bitmap_walk(struct rev_info *revs);
  49 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
  50 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  51                                        struct packed_git **packfile,
  52                                        uint32_t *entries, off_t *up_to);
  53 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  54                              kh_oid_map_t *reused_bitmaps, int show_progress);
  55 void free_bitmap_index(struct bitmap_index *);
  56
  57 /*
  58  * After a traversal has been performed by prepare_bitmap_walk(), this can be
  59  * queried to see if a particular object was reachable from any of the
  60  * objects flagged as UNINTERESTING.
  61  */
  62 int bitmap_has_oid_in_uninteresting(struct bitmap_index *, const struct object_id *oid);
  63
  64 void bitmap_writer_show_progress(int show);
  65 void bitmap_writer_set_checksum(unsigned char *sha1);
  66 void bitmap_writer_build_type_index(struct packing_data *to_pack,
  67                                     struct pack_idx_entry **index,
  68                                     uint32_t index_nr);
  69 void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  70 void bitmap_writer_select_commits(struct commit **indexed_commits,
  71                 unsigned int indexed_commits_nr, int max_bitmaps);
  72 void bitmap_writer_build(struct packing_data *to_pack);
  73 void bitmap_writer_finish(struct pack_idx_entry **index,
  74                           uint32_t index_nr,
  75                           const char *filename,
  76                           uint16_t options);
  77
  78 #endif