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