struct re_registers *,
Lisp_Object, int, int);
extern ptrdiff_t fast_string_match (Lisp_Object, Lisp_Object);
-extern ptrdiff_t fast_c_string_match_ignore_case (Lisp_Object, const char *);
+extern ptrdiff_t fast_c_string_match_ignore_case (Lisp_Object, const char *,
+ ptrdiff_t);
extern ptrdiff_t fast_string_match_ignore_case (Lisp_Object, Lisp_Object);
extern ptrdiff_t fast_looking_at (Lisp_Object, ptrdiff_t, ptrdiff_t,
ptrdiff_t, ptrdiff_t, Lisp_Object);