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b5007211b6
The "__attribute__" flag may be a noop on some compilers. That's OK as long as the code is correct without the attribute, but in this case it is not. We would typically end up with a struct that is 2 bytes too long due to struct padding, breaking both reading and writing of bitmaps. Instead of marshalling the data in a struct, let's just provide helpers for reading and writing the appropriate types. Besides being correct on all platforms, the result is more efficient and simpler to read. Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#ifndef PACK_BITMAP_H
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#define PACK_BITMAP_H
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#include "ewah/ewok.h"
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#include "khash.h"
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#include "pack-objects.h"
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struct bitmap_disk_header {
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char magic[4];
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uint16_t version;
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uint16_t options;
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uint32_t entry_count;
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unsigned char checksum[20];
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};
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static const char BITMAP_IDX_SIGNATURE[] = {'B', 'I', 'T', 'M'};
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#define NEEDS_BITMAP (1u<<22)
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enum pack_bitmap_opts {
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BITMAP_OPT_FULL_DAG = 1,
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BITMAP_OPT_HASH_CACHE = 4,
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};
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enum pack_bitmap_flags {
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BITMAP_FLAG_REUSE = 0x1
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};
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typedef int (*show_reachable_fn)(
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const unsigned char *sha1,
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enum object_type type,
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int flags,
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uint32_t hash,
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struct packed_git *found_pack,
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off_t found_offset);
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int prepare_bitmap_git(void);
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void count_bitmap_commit_list(uint32_t *commits, uint32_t *trees, uint32_t *blobs, uint32_t *tags);
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void traverse_bitmap_commit_list(show_reachable_fn show_reachable);
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void test_bitmap_walk(struct rev_info *revs);
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char *pack_bitmap_filename(struct packed_git *p);
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int prepare_bitmap_walk(struct rev_info *revs);
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int reuse_partial_packfile_from_bitmap(struct packed_git **packfile, uint32_t *entries, off_t *up_to);
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int rebuild_existing_bitmaps(struct packing_data *mapping, khash_sha1 *reused_bitmaps, int show_progress);
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void bitmap_writer_show_progress(int show);
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void bitmap_writer_set_checksum(unsigned char *sha1);
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void bitmap_writer_build_type_index(struct pack_idx_entry **index, uint32_t index_nr);
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void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack);
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void bitmap_writer_select_commits(struct commit **indexed_commits,
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unsigned int indexed_commits_nr, int max_bitmaps);
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void bitmap_writer_build(struct packing_data *to_pack);
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void bitmap_writer_finish(struct pack_idx_entry **index,
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uint32_t index_nr,
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const char *filename,
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uint16_t options);
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#endif
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