The R Project SVN R

/*
 *  Mathlib - A Mathematical Function Library
 *  Copyright (C) 1998  Ross Ihaka
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* NaNs propagated correctly */

#include "Mathlib.h"

double d1mach(int i)
{
    switch(i) {
    case 1: return DBL_MIN;
    case 2: return DBL_MAX;

    case 3: return pow((double)i1mach(10), -(double)i1mach(14));
    case 4: return pow((double)i1mach(10), 1-(double)i1mach(14));

    case 5: return log10(2.0);

    default: return 0.0;
    }
}

double d1mach_(int *i)
{
    return d1mach(*i);
}