210         return EOF;  in peek_next_getch_pushback_buffer()
219         return EOF;  in get_next_getch_pushback_buffer()
281     if (pushback != EOF)  in _getch_nolock()
287         return EOF;  in _getch_nolock()
307                 result = EOF;  in _getch_nolock()
369     if (pushback != EOF)  in _getche_nolock()
376     if (c == EOF)  in _getche_nolock()
377         return EOF;  in _getche_nolock()
379     if (_putch_nolock(c) == EOF)  in _getche_nolock()
380         return EOF;  in _getche_nolock()
409     if (peek_next_getch_pushback_buffer() != EOF) {  in _kbhit_nolock()
488     if (c == EOF || is_getch_pushback_buffer_full()) {  in _ungetch_nolock()
489         return EOF;  in _ungetch_nolock()