Andrew's git - gitweb.git/blob

   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
   8struct commit;
   9struct rev_info;
  10
  11struct 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
  19static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
  20
  21#define NEEDS_BITMAP (1u<<22)
  22
  23enum pack_bitmap_opts {
  24        BITMAP_OPT_FULL_DAG = 1,
  25        BITMAP_OPT_HASH_CACHE = 4,
  26};
  27
  28enum pack_bitmap_flags {
  29        BITMAP_FLAG_REUSE = 0x1
  30};
  31
  32typedef 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
  40struct bitmap_index;
  41
  42struct bitmap_index *prepare_bitmap_git(void);
  43void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
  44                              uint32_t *trees, uint32_t *blobs, uint32_t *tags);
  45void traverse_bitmap_commit_list(struct bitmap_index *,
  46                                 show_reachable_fn show_reachable);
  47void test_bitmap_walk(struct rev_info *revs);
  48struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
  49int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
  50                                       struct packed_git **packfile,
  51                                       uint32_t *entries, off_t *up_to);
  52int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
  53                             khash_sha1 *reused_bitmaps, int show_progress);
  54void 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 */
  61int bitmap_has_sha1_in_uninteresting(struct bitmap_index *, const unsigned char *sha1);
  62
  63void bitmap_writer_show_progress(int show);
  64void bitmap_writer_set_checksum(unsigned char *sha1);
  65void bitmap_writer_build_type_index(struct packing_data *to_pack,
  66                                    struct pack_idx_entry **index,
  67                                    uint32_t index_nr);
  68void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
  69void bitmap_writer_select_commits(struct commit **indexed_commits,
  70                unsigned int indexed_commits_nr, int max_bitmaps);
  71void bitmap_writer_build(struct packing_data *to_pack);
  72void bitmap_writer_finish(struct pack_idx_entry **index,
  73                          uint32_t index_nr,
  74                          const char *filename,
  75                          uint16_t options);
  76
  77#endif