merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 58 insertions, 0 deletions

diff --git a/third_party/git/midx.h b/third_party/git/midx.h
new file mode 100644
index 000000000000..f0ae656b5d76
--- /dev/null
+++ b/third_party/git/midx.h
@@ -0,0 +1,58 @@
+#ifndef MIDX_H
+#define MIDX_H
+
+#include "repository.h"
+
+struct object_id;
+struct pack_entry;
+struct repository;
+
+#define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
+
+struct multi_pack_index {
+	struct multi_pack_index *next;
+
+	int fd;
+
+	const unsigned char *data;
+	size_t data_len;
+
+	uint32_t signature;
+	unsigned char version;
+	unsigned char hash_len;
+	unsigned char num_chunks;
+	uint32_t num_packs;
+	uint32_t num_objects;
+
+	int local;
+
+	const unsigned char *chunk_pack_names;
+	const uint32_t *chunk_oid_fanout;
+	const unsigned char *chunk_oid_lookup;
+	const unsigned char *chunk_object_offsets;
+	const unsigned char *chunk_large_offsets;
+
+	const char **pack_names;
+	struct packed_git **packs;
+	char object_dir[FLEX_ARRAY];
+};
+
+struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local);
+int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id);
+int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result);
+struct object_id *nth_midxed_object_oid(struct object_id *oid,
+					struct multi_pack_index *m,
+					uint32_t n);
+int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m);
+int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name);
+int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local);
+
+int write_midx_file(const char *object_dir);
+void clear_midx_file(struct repository *r);
+int verify_midx_file(struct repository *r, const char *object_dir);
+int expire_midx_packs(struct repository *r, const char *object_dir);
+int midx_repack(struct repository *r, const char *object_dir, size_t batch_size);
+
+void close_midx(struct multi_pack_index *m);
+
+#endif