[thirdparty/git.git] / pack-bitmap.h

#ifndef PACK_BITMAP_H
#define PACK_BITMAP_H

#include "ewah/ewok.h"
#include "khash.h"
#include "pack-objects.h"

struct bitmap_disk_header {
	char magic[4];
	uint16_t version;
	uint16_t options;
	uint32_t entry_count;
	unsigned char checksum[20];
};

static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};

#define NEEDS_BITMAP (1u<<22)

enum pack_bitmap_opts {
	BITMAP_OPT_FULL_DAG = 1,
	BITMAP_OPT_HASH_CACHE = 4,
};

enum pack_bitmap_flags {
	BITMAP_FLAG_REUSE = 0x1
};

typedef int (*show_reachable_fn)(
	const struct object_id *oid,
	enum object_type type,
	int flags,
	uint32_t hash,
	struct packed_git *found_pack,
	off_t found_offset);

int prepare_bitmap_git(void);
void count_bitmap_commit_list(uint32_t *commits, uint32_t *trees, uint32_t *blobs, uint32_t *tags);
void traverse_bitmap_commit_list(show_reachable_fn show_reachable);
void test_bitmap_walk(struct rev_info *revs);
int prepare_bitmap_walk(struct rev_info *revs);
int reuse_partial_packfile_from_bitmap(struct packed_git **packfile, uint32_t *entries, off_t *up_to);
int rebuild_existing_bitmaps(struct packing_data *mapping, khash_sha1 *reused_bitmaps, int show_progress);

void bitmap_writer_show_progress(int show);
void bitmap_writer_set_checksum(unsigned char *sha1);
void bitmap_writer_build_type_index(struct pack_idx_entry **index, uint32_t index_nr);
void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
void bitmap_writer_select_commits(struct commit **indexed_commits,
		unsigned int indexed_commits_nr, int max_bitmaps);
void bitmap_writer_build(struct packing_data *to_pack);
void bitmap_writer_finish(struct pack_idx_entry **index,
			  uint32_t index_nr,
			  const char *filename,
			  uint16_t options);

#endif
Commit	Line	Data
fff42755 VM	1	#ifndef PACK_BITMAP_H
	2	#define PACK_BITMAP_H
	3
	4	#include "ewah/ewok.h"
	5	#include "khash.h"
7cc8f971	6	#include "pack-objects.h"
fff42755	7
fff42755 VM	8	struct bitmap_disk_header {
	9	char magic[4];
	10	uint16_t version;
	11	uint16_t options;
	12	uint32_t entry_count;
	13	unsigned char checksum[20];
	14	};
	15
	16	static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
	17
7cc8f971 VM	18	#define NEEDS_BITMAP (1u<<22)
7cc8f971 VM	19
fff42755	20	enum pack_bitmap_opts {
ae4f07fb VM	21	BITMAP_OPT_FULL_DAG = 1,
ae4f07fb VM	22	BITMAP_OPT_HASH_CACHE = 4,
fff42755 VM	23	};
fff42755 VM	24
7cc8f971 VM	25	enum pack_bitmap_flags {
	26	BITMAP_FLAG_REUSE = 0x1
	27	};
	28
fff42755	29	typedef int (*show_reachable_fn)(
20664967	30	const struct object_id *oid,
fff42755 VM	31	enum object_type type,
	32	int flags,
	33	uint32_t hash,
	34	struct packed_git *found_pack,
	35	off_t found_offset);
	36
	37	int prepare_bitmap_git(void);
	38	void count_bitmap_commit_list(uint32_t commits, uint32_t trees, uint32_t blobs, uint32_t tags);
	39	void traverse_bitmap_commit_list(show_reachable_fn show_reachable);
	40	void test_bitmap_walk(struct rev_info *revs);
fff42755 VM	41	int prepare_bitmap_walk(struct rev_info *revs);
fff42755 VM	42	int reuse_partial_packfile_from_bitmap(struct packed_git *packfile, uint32_t entries, off_t *up_to);
7cc8f971 VM	43	int rebuild_existing_bitmaps(struct packing_data mapping, khash_sha1 reused_bitmaps, int show_progress);
	44
	45	void bitmap_writer_show_progress(int show);
	46	void bitmap_writer_set_checksum(unsigned char *sha1);
	47	void bitmap_writer_build_type_index(struct pack_idx_entry **index, uint32_t index_nr);
	48	void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
	49	void bitmap_writer_select_commits(struct commit **indexed_commits,
	50	unsigned int indexed_commits_nr, int max_bitmaps);
	51	void bitmap_writer_build(struct packing_data *to_pack);
	52	void bitmap_writer_finish(struct pack_idx_entry **index,
	53	uint32_t index_nr,
ae4f07fb VM	54	const char *filename,
ae4f07fb VM	55	uint16_t options);
fff42755 VM	56
fff42755 VM	57	#endif