extern unsigned char* use_pack(struct packed_git *, struct pack_window **, unsigned long, unsigned int *);
extern void unuse_pack(struct pack_window **);
extern struct packed_git *add_packed_git(char *, int, int);
-extern int num_packed_objects(const struct packed_git *p);
-extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
+extern uint32_t num_packed_objects(const struct packed_git *p);
+extern int nth_packed_object_sha1(const struct packed_git *, uint32_t, unsigned char*);
extern unsigned long find_pack_entry_one(const unsigned char *, struct packed_git *);
extern void *unpack_entry(struct packed_git *, unsigned long, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);