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1 #ifndef PACK_BITMAP_H
2 #define PACK_BITMAP_H
3
4 #include "ewah/ewok.h"
5 #include "khash.h"
6 #include "pack.h"
7 #include "pack-objects.h"
8 #include "string-list.h"
9
10 struct commit;
11 struct repository;
12 struct rev_info;
13
14 static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
15
16 struct bitmap_disk_header {
17 char magic[ARRAY_SIZE(BITMAP_IDX_SIGNATURE)];
18 uint16_t version;
19 uint16_t options;
20 uint32_t entry_count;
21 unsigned char checksum[GIT_MAX_RAWSZ];
22 };
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 struct object_id *oid,
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 struct bitmap_index;
44
45 struct bitmap_index *prepare_bitmap_git(struct repository *r);
46 struct bitmap_index *prepare_midx_bitmap_git(struct multi_pack_index *midx);
47 void count_bitmap_commit_list(struct bitmap_index *, uint32_t *commits,
48 uint32_t *trees, uint32_t *blobs, uint32_t *tags);
49 void traverse_bitmap_commit_list(struct bitmap_index *,
50 struct rev_info *revs,
51 show_reachable_fn show_reachable);
52 void test_bitmap_walk(struct rev_info *revs);
53 int test_bitmap_commits(struct repository *r);
54 int test_bitmap_hashes(struct repository *r);
55 struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
56 int filter_provided_objects);
57 uint32_t midx_preferred_pack(struct bitmap_index *bitmap_git);
58 int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
59 struct packed_git **packfile,
60 uint32_t *entries,
61 struct bitmap **reuse_out);
62 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
63 kh_oid_map_t *reused_bitmaps, int show_progress);
64 void free_bitmap_index(struct bitmap_index *);
65 int bitmap_walk_contains(struct bitmap_index *,
66 struct bitmap *bitmap, const struct object_id *oid);
67
68 /*
69 * After a traversal has been performed by prepare_bitmap_walk(), this can be
70 * queried to see if a particular object was reachable from any of the
71 * objects flagged as UNINTERESTING.
72 */
73 int bitmap_has_oid_in_uninteresting(struct bitmap_index *, const struct object_id *oid);
74
75 off_t get_disk_usage_from_bitmap(struct bitmap_index *, struct rev_info *);
76
77 void bitmap_writer_show_progress(int show);
78 void bitmap_writer_set_checksum(unsigned char *sha1);
79 void bitmap_writer_build_type_index(struct packing_data *to_pack,
80 struct pack_idx_entry **index,
81 uint32_t index_nr);
82 uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
83 struct packing_data *mapping);
84 int rebuild_bitmap(const uint32_t *reposition,
85 struct ewah_bitmap *source,
86 struct bitmap *dest);
87 struct ewah_bitmap *bitmap_for_commit(struct bitmap_index *bitmap_git,
88 struct commit *commit);
89 void bitmap_writer_select_commits(struct commit **indexed_commits,
90 unsigned int indexed_commits_nr, int max_bitmaps);
91 int bitmap_writer_build(struct packing_data *to_pack);
92 void bitmap_writer_finish(struct pack_idx_entry **index,
93 uint32_t index_nr,
94 const char *filename,
95 uint16_t options);
96 char *midx_bitmap_filename(struct multi_pack_index *midx);
97 char *pack_bitmap_filename(struct packed_git *p);
98
99 int bitmap_is_midx(struct bitmap_index *bitmap_git);
100
101 const struct string_list *bitmap_preferred_tips(struct repository *r);
102 int bitmap_is_preferred_refname(struct repository *r, const char *refname);
103
104 #endif