typedef unsigned short Rune16;

wchar_t	*widen(char *s);
char		*narrowen(wchar_t *ws);
int		widebytes(wchar_t *ws);
int		runes16len(Rune16*);
int		rune16nlen(Rune16*, int);
Rune16*	runes16dup(Rune16*);
Rune16*	utftorunes16(Rune16*, char*, int);
char*	runes16toutf(char*, Rune16*, int);
int		runes16cmp(Rune16*, Rune16*);