getch

static VALUE
curses_getch(VALUE obj)
{
    int c;

    curses_stdscr();
    rb_thread_blocking_region(getch_func, (void *)&c, RUBY_UBF_IO, 0);
    if (c == EOF) return Qnil;
    if (rb_isprint(c)) {
        char ch = (char)c;

        return rb_locale_str_new(&ch, 1);
    }
    return UINT2NUM(c);
}