Java Long to Byte Array longToByteArray(long value, byte[] data, int offset)

Description

long To Byte Array

License

Apache License

Declaration

public static byte[] longToByteArray(long value, byte[] data, int offset) 

Method Source Code

//package com.java2s;
/**/*from www  .  j av  a 2s  .  c o  m*/
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (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.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.
 * 
 * @project loonframework
 * @author chenpeng
 * @email?ceponline@yahoo.com.cn
 * @version 0.1
 */

public class Main {
    public static byte[] longToByteArray(long value, byte[] data, int offset) {
        if (data == null)
            data = new byte[8];

        long temp = Math.abs(value);

        for (int i = 0; i < 8; i++) {
            data[offset + i] = (byte) (temp % 256);
            temp = temp / 256;

            if (i == 0 && value < 0)
                data[offset] = (byte) (~data[offset] + 1);
            else if (value < 0)
                data[offset + i] = (byte) (~data[offset + i] + (data[offset + i - 1] == 0 ? 1 : 0));
        }

        return data;
    }
}

Related

1. longToByteArray(long value)
2. longToByteArray(long value)
3. longToByteArray(long value)
4. longToByteArray(long value, byte[] buffer, int offset)
5. longToByteArray(long value, byte[] byteArray)
6. longToByteArray(long value, byte[] dest)
7. longToByteArray(long value, int nrOfBytes)
8. longToByteArray6(long addr)
9. longToByteArray6(long addr)