extern struct diff_filespec *alloc_filespec(const char *);
 extern void free_filespec(struct diff_filespec *);
-extern void fill_filespec(struct diff_filespec *, const unsigned char *,
+extern void fill_filespec(struct diff_filespec *, const struct object_id *,
                          int, unsigned short);
 
 #define CHECK_SIZE_ONLY 1
                                  struct diff_filespec *dst,
                                  void **src_count_p,
                                  void **dst_count_p,
-                                 unsigned long delta_limit,
                                  unsigned long *src_copied,
                                  unsigned long *literal_added);