1 files changed, 57 insertions, 0 deletions
diff --git a/pack-bitmap.h b/pack-bitmap.h
new file mode 100644
index 0000000000..0adcef77b5
--- /dev/null
+++ b/pack-bitmap.h
@@ -0,0 +1,57 @@
+#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 unsigned char *sha1,
+	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