/home/leaf/crossfire/jxclient/trunk/util/src/main/java/com/realtime/crossfire/jxclient/util/MathUtils.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient 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.
 *
 * JXClient 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 JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.util;

public class MathUtils {

    private MathUtils() {
    }

    public static int div(final int numerator, final int denominator) {
        if (numerator >= 0) {
            return numerator/denominator;
        } else {
            return -((denominator-1-numerator)/denominator);
        }
    }

    public static int mod(final int numerator, final int denominator) {
        final int result = numerator%denominator;
        return result < 0 ? result+denominator : result;
    }

    public static int divRoundUp(final int numerator, final int denominator) {
        if (numerator >= 0) {
            return (numerator+denominator-1)/denominator;
        } else {
            return -(-numerator/denominator);
        }
    }

    public static int divRound(final int numerator, final int denominator) {
        if (numerator >= 0) {
            return (numerator+denominator/2)/denominator;
        } else {
            return -((-numerator-denominator/2+1)/denominator);
        }
    }

}

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