+extern wchar_t _rl_char_value PARAMS((char *, int));
+extern int _rl_walphabetic PARAMS((wchar_t));
+
+#define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))
+#define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))
+
+#define MB_NEXTCHAR(b,s,c,f) \
+ ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
+ ? _rl_find_next_mbchar ((b), (s), (c), (f)) \
+ : ((s) + (c)))
+#define MB_PREVCHAR(b,s,f) \
+ ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
+ ? _rl_find_prev_mbchar ((b), (s), (f)) \
+ : ((s) - 1))
+
+#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
+#define MB_NULLWCH(x) ((x) == 0)
+