| #ifndef PACKFILE_H |
| #define PACKFILE_H |
| |
| #include "cache.h" |
| #include "oidset.h" |
| |
| /* in object-store.h */ |
| struct packed_git; |
| struct object_info; |
| |
| /* |
| * Generate the filename to be used for a pack file with checksum "sha1" and |
| * extension "ext". The result is written into the strbuf "buf", overwriting |
| * any existing contents. A pointer to buf->buf is returned as a convenience. |
| * |
| * Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx" |
| */ |
| char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext); |
| |
| /* |
| * Return the name of the (local) packfile with the specified sha1 in |
| * its name. The return value is a pointer to memory that is |
| * overwritten each time this function is called. |
| */ |
| char *sha1_pack_name(const unsigned char *sha1); |
| |
| /* |
| * Return the name of the (local) pack index file with the specified |
| * sha1 in its name. The return value is a pointer to memory that is |
| * overwritten each time this function is called. |
| */ |
| char *sha1_pack_index_name(const unsigned char *sha1); |
| |
| /* |
| * Return the basename of the packfile, omitting any containing directory |
| * (e.g., "pack-1234abcd[...].pack"). |
| */ |
| const char *pack_basename(struct packed_git *p); |
| |
| struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); |
| |
| typedef void each_file_in_pack_dir_fn(const char *full_path, size_t full_path_len, |
| const char *file_pach, void *data); |
| void for_each_file_in_pack_dir(const char *objdir, |
| each_file_in_pack_dir_fn fn, |
| void *data); |
| |
| /* A hook to report invalid files in pack directory */ |
| #define PACKDIR_FILE_PACK 1 |
| #define PACKDIR_FILE_IDX 2 |
| #define PACKDIR_FILE_GARBAGE 4 |
| extern void (*report_garbage)(unsigned seen_bits, const char *path); |
| |
| void reprepare_packed_git(struct repository *r); |
| void install_packed_git(struct repository *r, struct packed_git *pack); |
| |
| struct packed_git *get_packed_git(struct repository *r); |
| struct list_head *get_packed_git_mru(struct repository *r); |
| struct multi_pack_index *get_multi_pack_index(struct repository *r); |
| struct multi_pack_index *get_local_multi_pack_index(struct repository *r); |
| struct packed_git *get_all_packs(struct repository *r); |
| |
| /* |
| * Give a rough count of objects in the repository. This sacrifices accuracy |
| * for speed. |
| */ |
| unsigned long repo_approximate_object_count(struct repository *r); |
| #define approximate_object_count() repo_approximate_object_count(the_repository) |
| |
| struct packed_git *find_sha1_pack(const unsigned char *sha1, |
| struct packed_git *packs); |
| |
| void pack_report(void); |
| |
| /* |
| * mmap the index file for the specified packfile (if it is not |
| * already mmapped). Return 0 on success. |
| */ |
| int open_pack_index(struct packed_git *); |
| |
| /* |
| * munmap the index file for the specified packfile (if it is |
| * currently mmapped). |
| */ |
| void close_pack_index(struct packed_git *); |
| |
| int close_pack_fd(struct packed_git *p); |
| |
| uint32_t get_pack_fanout(struct packed_git *p, uint32_t value); |
| |
| unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); |
| void close_pack_windows(struct packed_git *); |
| void close_pack(struct packed_git *); |
| void close_object_store(struct raw_object_store *o); |
| void unuse_pack(struct pack_window **); |
| void clear_delta_base_cache(void); |
| struct packed_git *add_packed_git(const char *path, size_t path_len, int local); |
| |
| /* |
| * Unlink the .pack and associated extension files. |
| * Does not unlink if 'force_delete' is false and the pack-file is |
| * marked as ".keep". |
| */ |
| void unlink_pack_path(const char *pack_name, int force_delete); |
| |
| /* |
| * Make sure that a pointer access into an mmap'd index file is within bounds, |
| * and can provide at least 8 bytes of data. |
| * |
| * Note that this is only necessary for variable-length segments of the file |
| * (like the 64-bit extended offset table), as we compare the size to the |
| * fixed-length parts when we open the file. |
| */ |
| void check_pack_index_ptr(const struct packed_git *p, const void *ptr); |
| |
| /* |
| * Perform binary search on a pack-index for a given oid. Packfile is expected to |
| * have a valid pack-index. |
| * |
| * See 'bsearch_hash' for more information. |
| */ |
| int bsearch_pack(const struct object_id *oid, const struct packed_git *p, uint32_t *result); |
| |
| /* |
| * Write the oid of the nth object within the specified packfile into the first |
| * parameter. Open the index if it is not already open. Returns 0 on success, |
| * negative otherwise. |
| */ |
| int nth_packed_object_id(struct object_id *, struct packed_git *, uint32_t n); |
| |
| /* |
| * Return the offset of the nth object within the specified packfile. |
| * The index must already be opened. |
| */ |
| off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); |
| |
| /* |
| * If the object named sha1 is present in the specified packfile, |
| * return its offset within the packfile; otherwise, return 0. |
| */ |
| off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); |
| |
| int is_pack_valid(struct packed_git *); |
| void *unpack_entry(struct repository *r, struct packed_git *, off_t, enum object_type *, unsigned long *); |
| unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep); |
| unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t); |
| int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); |
| off_t get_delta_base(struct packed_git *p, struct pack_window **w_curs, |
| off_t *curpos, enum object_type type, |
| off_t delta_obj_offset); |
| |
| void release_pack_memory(size_t); |
| |
| /* global flag to enable extra checks when accessing packed objects */ |
| extern int do_check_packed_object_crc; |
| |
| int packed_object_info(struct repository *r, |
| struct packed_git *pack, |
| off_t offset, struct object_info *); |
| |
| void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1); |
| const struct packed_git *has_packed_and_bad(struct repository *r, const unsigned char *sha1); |
| |
| /* |
| * Iff a pack file in the given repository contains the object named by sha1, |
| * return true and store its location to e. |
| */ |
| int find_pack_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e); |
| |
| int has_object_pack(const struct object_id *oid); |
| |
| int has_pack_index(const unsigned char *sha1); |
| |
| /* |
| * Return 1 if an object in a promisor packfile is or refers to the given |
| * object, 0 otherwise. |
| */ |
| int is_promisor_object(const struct object_id *oid); |
| |
| /* |
| * Expose a function for fuzz testing. |
| * |
| * load_idx() parses a block of memory as a packfile index and puts the results |
| * into a struct packed_git. |
| * |
| * This function should not be used directly. It is exposed here only so that we |
| * have a convenient entry-point for fuzz testing. For real uses, you should |
| * probably use open_pack_index() or parse_pack_index() instead. |
| */ |
| int load_idx(const char *path, const unsigned int hashsz, void *idx_map, |
| size_t idx_size, struct packed_git *p); |
| |
| #endif |