/* return time precision as integer */
_gtprec(tprec, tauto)
{
        local tp;

        if (argc < 2)
        {
                tp = castint(getconf("TIME_PRECISION"));
                if (tp == -1) tauto = 1;
                if (argc < 1)
                {
                        if (tauto)         tprec = 3;
                }
        }
        if (tauto) tp = 3;
        else tp = tprec;

        return(tp);
}