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_entry {
   9         uint32_t object_pos;
  10         uint8_t xor_offset;
  11         uint8_t flags;
  12 } __attribute__((packed));
  13
  14 struct bitmap_disk_header {
  15         char magic[4];
  16         uint16_t version;
  17         uint16_t options;
  18         uint32_t entry_count;
  19         unsigned char checksum[20];
  20 };
  21
  22 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  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 unsigned char *sha1,
  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 int prepare_bitmap_git(void);
  44 void count_bitmap_commit_list(uint32_t *commits, uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  45 void traverse_bitmap_commit_list(show_reachable_fn show_reachable);
  46 void test_bitmap_walk(struct rev_info *revs);
  47 char *pack_bitmap_filename(struct packed_git *p);
  48 int prepare_bitmap_walk(struct rev_info *revs);
  49 int reuse_partial_packfile_from_bitmap(struct packed_git **packfile, uint32_t *entries, off_t *up_to);
  50 int rebuild_existing_bitmaps(struct packing_data *mapping, khash_sha1 *reused_bitmaps, int show_progress);
  51
  52 void bitmap_writer_show_progress(int show);
  53 void bitmap_writer_set_checksum(unsigned char *sha1);
  54 void bitmap_writer_build_type_index(struct pack_idx_entry **index, uint32_t index_nr);
  55 void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  56 void bitmap_writer_select_commits(struct commit **indexed_commits,
  57                 unsigned int indexed_commits_nr, int max_bitmaps);
  58 void bitmap_writer_build(struct packing_data *to_pack);
  59 void bitmap_writer_finish(struct pack_idx_entry **index,
  60                           uint32_t index_nr,
  61                           const char *filename,
  62                           uint16_t options);
  63
  64 #endif