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 rev_info;
  10
  11 struct bitmap_disk_header {
  12         char magic[4];
  13         uint16_t version;
  14         uint16_t options;
  15         uint32_t entry_count;
  16         unsigned char checksum[20];
  17 };
  18
  19 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  20
  21 #define NEEDS_BITMAP (1u<<22)
  22
  23 enum pack_bitmap_opts {
  24         BITMAP_OPT_FULL_DAG = 1,
  25         BITMAP_OPT_HASH_CACHE = 4,
  26 };
  27
  28 enum pack_bitmap_flags {
  29         BITMAP_FLAG_REUSE = 0x1
  30 };
  31
  32 typedef int (*show_reachable_fn)(
  33         const struct object_id *oid,
  34         enum object_type type,
  35         int flags,
  36         uint32_t hash,
  37         struct packed_git *found_pack,
  38         off_t found_offset);
  39
  40 struct bitmap_index;
  41
  42 struct bitmap_index *prepare_bitmap_git(void);
  43 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  44                               uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  45 void traverse_bitmap_commit_list(struct bitmap_index *,
  46                                  show_reachable_fn show_reachable);
  47 void test_bitmap_walk(struct rev_info *revs);
  48 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
  49 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  50                                        struct packed_git **packfile,
  51                                        uint32_t *entries, off_t *up_to);
  52 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  53                              khash_sha1 *reused_bitmaps, int show_progress);
  54 void free_bitmap_index(struct bitmap_index *);
  55
  56 /*
  57  * After a traversal has been performed by prepare_bitmap_walk(), this can be
  58  * queried to see if a particular object was reachable from any of the
  59  * objects flagged as UNINTERESTING.
  60  */
  61 int bitmap_has_sha1_in_uninteresting(struct bitmap_index *, const unsigned char *sha1);
  62
  63 void bitmap_writer_show_progress(int show);
  64 void bitmap_writer_set_checksum(unsigned char *sha1);
  65 void bitmap_writer_build_type_index(struct packing_data *to_pack,
  66                                     struct pack_idx_entry **index,
  67                                     uint32_t index_nr);
  68 void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  69 void bitmap_writer_select_commits(struct commit **indexed_commits,
  70                 unsigned int indexed_commits_nr, int max_bitmaps);
  71 void bitmap_writer_build(struct packing_data *to_pack);
  72 void bitmap_writer_finish(struct pack_idx_entry **index,
  73                           uint32_t index_nr,
  74                           const char *filename,
  75                           uint16_t options);
  76
  77 #endif