/*
   From Info-Unix mailing list.... May 1990
>I want to do some computation and be able to stop by a key pressed by the
>user.  Turbo C has a function kbhit() and Turbo Pascal has keypressed(),
>but what can be done with UNIX?  I've looked into the stdin structure:

Try this.:
-- 
Jim Patterson                              Cognos Incorporated
*/

int kbhit()
/* returns the number of characters waiting, since last read        */
{
    long        count;

    /*  Add  up the count of characters in the file buffer          */
    /*  and the count of characters in the device buffer.           */
    count = 0;
    if( stdin != NULL ){
        ioctl( stdin->_file, FIONREAD, &count );
        count += stdin->_cnt;
    }
    return( (int)( count ) ); 
} /* kbhit */
/*
dick@csci.csusb.edu=rbotting@wiley.csusb.edu.
Disclaimer::=`I and CSUSB are not responsible for this code. 
	Use intelligently a nd at your own risk`.
*/