Java Array Swap swapInts(byte b[], int off, int len)

Description

swap Ints

License

LGPL

Declaration

public static byte[] swapInts(byte b[], int off, int len) 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1/*  w w w . ja  v  a 2 s. c om*/
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * See @authors listed below
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

public class Main {
    public static byte[] swapInts(byte b[], int off, int len) {
        checkLength(len, 4);
        for (int i = off, n = off + len; i < n; i += 4) {
            swap(b, i, i + 3);
            swap(b, i + 1, i + 2);
        }
        return b;
    }

    private static void checkLength(int len, int numBytes) {
        if (len < 0 || (len % numBytes) != 0)
            throw new IllegalArgumentException("length: " + len);
    }

    private static void swap(byte[] bytes, int a, int b) {
        byte t = bytes[a];
        bytes[a] = bytes[b];
        bytes[b] = t;
    }
}

Related

1. swapBytes(byte[] dataToSwap, int wordByteLength)
2. swapBytesAt(byte[] bytes, int p1, int p2)
3. swapElements(final E[] arr, final int idx1, final int idx2)
4. swapEndianFormat(byte[] b)
5. swapInt(byte[] b, int i)
6. swapNumbers(int i, int j, double[] array)
7. swapObjects(Object[] array, int a, int b)
8. swapOrder16(byte[] buffer, int byteOffset, int sampleCount)
9. swapOrder32(byte[] buffer, int byteOffset, int sampleCount)