Java Array Unpack unpackLittleEndianLong(byte[] bytes)

Description

Convert the given little-endian packed byte[8] into a long.

License

Open Source License

Declaration

public static long unpackLittleEndianLong(byte[] bytes) 

Method Source Code

//package com.java2s;
/**//from ww  w .j a  va  2 s.c  o  m
 * FoundationDB Lucene Layer
 * Copyright (c) 2013 FoundationDB, LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

public class Main {
    /** Convert the given little-endian packed byte[8] into a long. */
    public static long unpackLittleEndianLong(byte[] bytes) {
        if (bytes == null) {
            return 0;
        }
        assert bytes.length == 8 : bytes.length;
        long unpacked = 0;
        for (int i = 0; i < 8; ++i) {
            long cur = (bytes[i] & 0xFFL) << (i * 8);
            unpacked += cur;
        }
        return unpacked;
    }
}

Related

1. UnpackFloatBuffer(byte[] buffer, long bytes_read, long num_loaded, float[] list)
2. unpackInt(byte[] data, int offset)
3. unpackIntegerByWidth(int len, byte[] buf, int offset)
4. unpackLE(long aValue, byte[] aBuf, int aOffset)
5. UnpackLittle32(byte[] bytes, int integer)
6. unpackLong(byte[] arr, int i, int j)
7. unpackw(int[] sourcearray, int arraypos, int[] data, int num, int b)