intrflush
#define qiflush() ((void) intrflush((WINDOW *) 0, 1))
#define noqiflush() ((void) intrflush((WINDOW *) 0, 0))
extern int intrflush(WINDOW *, bool);
(intrflush)(WINDOW *w, bool bf)
#define qiflush() ((void) intrflush(NULL, 1))
#define noqiflush() ((void) intrflush(NULL, 0))
extern int intrflush(WINDOW *, bool);