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.h"
   7 #include "pack-objects.h"
   8
   9 struct commit;
  10 struct repository;
  11 struct rev_info;
  12
  13 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  14
  15 struct bitmap_disk_header {
  16         char magic[ARRAY_SIZE(BITMAP_IDX_SIGNATURE)];
  17         uint16_t version;
  18         uint16_t options;
  19         uint32_t entry_count;
  20         unsigned char checksum[GIT_MAX_RAWSZ];
  21 };
  22
  23 #define NEEDS_BITMAP (1u<<22)
  24
  25 enum pack_bitmap_opts {
  26         BITMAP_OPT_FULL_DAG = 1,
  27         BITMAP_OPT_HASH_CACHE = 4,
  28 };
  29
  30 enum pack_bitmap_flags {
  31         BITMAP_FLAG_REUSE = 0x1
  32 };
  33
  34 typedef int (*show_reachable_fn)(
  35         const struct object_id *oid,
  36         enum object_type type,
  37         int flags,
  38         uint32_t hash,
  39         struct packed_git *found_pack,
  40         off_t found_offset);
  41
  42 struct bitmap_index;
  43
  44 struct bitmap_index *prepare_bitmap_git(struct repository *r);
  45 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  46                               uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  47 void traverse_bitmap_commit_list(struct bitmap_index *,
  48                                  show_reachable_fn show_reachable);
  49 void test_bitmap_walk(struct rev_info *revs);
  50 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
  51 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  52                                        struct packed_git **packfile,
  53                                        uint32_t *entries,
  54                                        struct bitmap **reuse_out);
  55 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  56                              kh_oid_map_t *reused_bitmaps, int show_progress);
  57 void free_bitmap_index(struct bitmap_index *);
  58 int bitmap_walk_contains(struct bitmap_index *,
  59                          struct bitmap *bitmap, const struct object_id *oid);
  60
  61 /*
  62  * After a traversal has been performed by prepare_bitmap_walk(), this can be
  63  * queried to see if a particular object was reachable from any of the
  64  * objects flagged as UNINTERESTING.
  65  */
  66 int bitmap_has_oid_in_uninteresting(struct bitmap_index *, const struct object_id *oid);
  67
  68 void bitmap_writer_show_progress(int show);
  69 void bitmap_writer_set_checksum(unsigned char *sha1);
  70 void bitmap_writer_build_type_index(struct packing_data *to_pack,
  71                                     struct pack_idx_entry **index,
  72                                     uint32_t index_nr);
  73 void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  74 void bitmap_writer_select_commits(struct commit **indexed_commits,
  75                 unsigned int indexed_commits_nr, int max_bitmaps);
  76 void bitmap_writer_build(struct packing_data *to_pack);
  77 void bitmap_writer_finish(struct pack_idx_entry **index,
  78                           uint32_t index_nr,
  79                           const char *filename,
  80                           uint16_t options);
  81
  82 #endif