extern int has_sha1_pack(const unsigned char *sha1);
extern int has_sha1_file(const unsigned char *sha1);
+extern void *map_sha1_file(const unsigned char *sha1, unsigned long *);
+extern int legacy_loose_object(unsigned char *);
extern int has_pack_file(const unsigned char *sha1);
extern int has_pack_index(const unsigned char *sha1);