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 struct list_objects_filter_options;
  13
  14 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  15
  16 struct bitmap_disk_header {
  17         char magic[ARRAY_SIZE(BITMAP_IDX_SIGNATURE)];
  18         uint16_t version;
  19         uint16_t options;
  20         uint32_t entry_count;
  21         unsigned char checksum[GIT_MAX_RAWSZ];
  22 };
  23
  24 #define NEEDS_BITMAP (1u<<22)
  25
  26 enum pack_bitmap_opts {
  27         BITMAP_OPT_FULL_DAG = 1,
  28         BITMAP_OPT_HASH_CACHE = 4,
  29 };
  30
  31 enum pack_bitmap_flags {
  32         BITMAP_FLAG_REUSE = 0x1
  33 };
  34
  35 typedef int (*show_reachable_fn)(
  36         const struct object_id *oid,
  37         enum object_type type,
  38         int flags,
  39         uint32_t hash,
  40         struct packed_git *found_pack,
  41         off_t found_offset);
  42
  43 struct bitmap_index;
  44
  45 struct bitmap_index *prepare_bitmap_git(struct repository *r);
  46 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  47                               uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  48 void traverse_bitmap_commit_list(struct bitmap_index *,
  49                                  struct rev_info *revs,
  50                                  show_reachable_fn show_reachable);
  51 void test_bitmap_walk(struct rev_info *revs);
  52 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
  53                                          struct list_objects_filter_options *filter);
  54 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  55                                        struct packed_git **packfile,
  56                                        uint32_t *entries,
  57                                        struct bitmap **reuse_out);
  58 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  59                              kh_oid_map_t *reused_bitmaps, int show_progress);
  60 void free_bitmap_index(struct bitmap_index *);
  61 int bitmap_walk_contains(struct bitmap_index *,
  62                          struct bitmap *bitmap, const struct object_id *oid);
  63
  64 /*
  65  * After a traversal has been performed by prepare_bitmap_walk(), this can be
  66  * queried to see if a particular object was reachable from any of the
  67  * objects flagged as UNINTERESTING.
  68  */
  69 int bitmap_has_oid_in_uninteresting(struct bitmap_index *, const struct object_id *oid);
  70
  71 void bitmap_writer_show_progress(int show);
  72 void bitmap_writer_set_checksum(unsigned char *sha1);
  73 void bitmap_writer_build_type_index(struct packing_data *to_pack,
  74                                     struct pack_idx_entry **index,
  75                                     uint32_t index_nr);
  76 uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
  77                                 struct packing_data *mapping);
  78 int rebuild_bitmap(const uint32_t *reposition,
  79                    struct ewah_bitmap *source,
  80                    struct bitmap *dest);
  81 struct ewah_bitmap *bitmap_for_commit(struct bitmap_index *bitmap_git,
  82                                       struct commit *commit);
  83 void bitmap_writer_select_commits(struct commit **indexed_commits,
  84                 unsigned int indexed_commits_nr, int max_bitmaps);
  85 void bitmap_writer_build(struct packing_data *to_pack);
  86 void bitmap_writer_finish(struct pack_idx_entry **index,
  87                           uint32_t index_nr,
  88                           const char *filename,
  89                           uint16_t options);
  90
  91 #endif