Java Number Copy Sign copySign(final double magnitude, final double sign)

Description

Copies the sign of sign into magnitude.

License

Open Source License

Parameter

Parameter	Description
magnitude	a parameter
sign	a parameter

Declaration

public static double copySign(final double magnitude, final double sign) 

Method Source Code

//package com.java2s;
/*/*from w  w  w . ja v  a2  s.  c o m*/
 * ====================================================
 * Copyright (C) 2013 by Idylwood Technologies, LLC. All rights reserved.
 *
 * Developed at Idylwood Technologies, LLC.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * The License should have been distributed to you with the source tree.
 * If not, it can be found at
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Author: Charles Cooper
 * Date: 2013
 * ====================================================
 */

public class Main {
    /**
     * Copies the sign of sign into magnitude.
     * Faster than OpenJDK implementation.
     * @param magnitude
     * @param sign
     * @return
     */
    public static double copySign(final double magnitude, final double sign) {
        final long m = Double.doubleToLongBits(magnitude);
        final long s = Double.doubleToLongBits(sign);
        if (0 <= (m ^ s))
            return -magnitude;
        return magnitude; // flip sign
    }
}

Related

1. copySign(Double magnitude, Double sign)
2. copySign(double magnitude, double sign)
3. copySign(double x, double y)
4. copysign(final double x, final double y)
5. copySign(final double x, final double y)