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 bitmap_disk_header {
   9         char magic[4];
  10         uint16_t version;
  11         uint16_t options;
  12         uint32_t entry_count;
  13         unsigned char checksum[20];
  14 };
  15
  16 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  17
  18 #define NEEDS_BITMAP (1u<<22)
  19
  20 enum pack_bitmap_opts {
  21         BITMAP_OPT_FULL_DAG = 1,
  22         BITMAP_OPT_HASH_CACHE = 4,
  23 };
  24
  25 enum pack_bitmap_flags {
  26         BITMAP_FLAG_REUSE = 0x1
  27 };
  28
  29 typedef int (*show_reachable_fn)(
  30         const struct object_id *oid,
  31         enum object_type type,
  32         int flags,
  33         uint32_t hash,
  34         struct packed_git *found_pack,
  35         off_t found_offset);
  36
  37 struct bitmap_index;
  38
  39 struct bitmap_index *prepare_bitmap_git(void);
  40 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  41                               uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  42 void traverse_bitmap_commit_list(struct bitmap_index *,
  43                                  show_reachable_fn show_reachable);
  44 void test_bitmap_walk(struct rev_info *revs);
  45 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
  46 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  47                                        struct packed_git **packfile,
  48                                        uint32_t *entries, off_t *up_to);
  49 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  50                              khash_sha1 *reused_bitmaps, int show_progress);
  51 void free_bitmap_index(struct bitmap_index *);
  52
  53 void bitmap_writer_show_progress(int show);
  54 void bitmap_writer_set_checksum(unsigned char *sha1);
  55 void bitmap_writer_build_type_index(struct packing_data *to_pack,
  56                                     struct pack_idx_entry **index,
  57                                     uint32_t index_nr);
  58 void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  59 void bitmap_writer_select_commits(struct commit **indexed_commits,
  60                 unsigned int indexed_commits_nr, int max_bitmaps);
  61 void bitmap_writer_build(struct packing_data *to_pack);
  62 void bitmap_writer_finish(struct pack_idx_entry **index,
  63                           uint32_t index_nr,
  64                           const char *filename,
  65                           uint16_t options);
  66
  67 #endif