*/
extern char *sha1_pack_index_name(const unsigned char *sha1);
-extern unsigned int pack_used_ctr;
-extern unsigned int pack_mmap_calls;
-extern unsigned int peak_pack_open_windows;
-extern unsigned int pack_open_windows;
-extern unsigned int pack_open_fds;
-extern unsigned int pack_max_fds;
-extern size_t peak_pack_mapped;
-extern size_t pack_mapped;
+extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
+
+/* 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);
+
+extern void prepare_packed_git(void);
+extern void reprepare_packed_git(void);
+extern void install_packed_git(struct packed_git *pack);
+
+/*
+ * Give a rough count of objects in the repository. This sacrifices accuracy
+ * for speed.
+ */
+unsigned long approximate_object_count(void);
+
+extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
+ struct packed_git *packs);
extern void pack_report(void);
+/*
+ * mmap the index file for the specified packfile (if it is not
+ * already mmapped). Return 0 on success.
+ */
+extern int open_pack_index(struct packed_git *);
+
+/*
+ * munmap the index file for the specified packfile (if it is
+ * currently mmapped).
+ */
+extern void close_pack_index(struct packed_git *);
+
+extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
+extern void close_pack_windows(struct packed_git *);
+extern void close_all_packs(void);
+extern void unuse_pack(struct pack_window **);
+extern void clear_delta_base_cache(void);
+extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
+
+/*
+ * 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.
+ */
+extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
+
+/*
+ * Return the SHA-1 of the nth object within the specified packfile.
+ * Open the index if it is not already open. The return value points
+ * at the SHA-1 within the mmapped index. Return NULL if there is an
+ * error.
+ */
+extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
+/*
+ * Like nth_packed_object_sha1, but write the data into the object specified by
+ * the the first argument. Returns the first argument on success, and NULL on
+ * error.
+ */
+extern const struct object_id *nth_packed_object_oid(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.
+ */
+extern 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.
+ */
+extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
+
+extern int is_pack_valid(struct packed_git *);
+extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
+extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
+extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
+extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
+
+extern void release_pack_memory(size_t);
+
+/* global flag to enable extra checks when accessing packed objects */
+extern int do_check_packed_object_crc;
+
+extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *);
+
+extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1);
+extern const struct packed_git *has_packed_and_bad(const unsigned char *sha1);
+
+extern int find_pack_entry(const unsigned char *sha1, struct pack_entry *e);
+
+extern int has_sha1_pack(const unsigned char *sha1);
+
+extern int has_pack_index(const unsigned char *sha1);
+
+/*
+ * Iterate over packed objects in both the local
+ * repository and any alternates repositories (unless the
+ * FOR_EACH_OBJECT_LOCAL_ONLY flag, defined in cache.h, is set).
+ */
+typedef int each_packed_object_fn(const struct object_id *oid,
+ struct packed_git *pack,
+ uint32_t pos,
+ void *data);
+extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
+
#endif