/* normalization string to integer */
_nrm2int(n)
{
        switch (n)
        {
                case _nonestr:
                default:
                        return(0);

                case _normalizedstr:
                        return(1);

                case _biasedstr:
                        return(2);

                case _unbiasedstr:
                        return(3);
        }
}