_mbaddch
extern int _mbaddch(WINDOW *, chtype, chtype);
rv = _mbaddch(win, rawattrs, RBYTE(rawc));
if ((rv = _mbaddch(win, A_NORMAL,
rv = _mbaddch(win, A_NORMAL, RBYTE(c));
(void) _mbaddch(win, A_NORMAL, RBYTE(*sp));