Java Bits Convert to bitToLong(byte[] bytes, int offset, int length)

Description

Interpret a BIT value as a long.

License

Open Source License

Parameter

Parameter	Description
bytes	byte buffer
offset	offset in buffer
length	number of bytes to use

Return

long value

Declaration

public static long bitToLong(byte[] bytes, int offset, int length) 

Method Source Code

//package com.java2s;
/*/*from ww w  . j  av  a  2s .  c  o m*/
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 2.0, as published by the
 * Free Software Foundation.
 *
 * This program is also distributed with certain software (including but not
 * limited to OpenSSL) that is licensed under separate terms, as designated in a
 * particular file or component or in included license documentation. The
 * authors of MySQL hereby grant you an additional permission to link the
 * program and your derivative works with the separately licensed software that
 * they have included with MySQL.
 *
 * Without limiting anything contained in the foregoing, this file, which is
 * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
 * version 1.0, a copy of which can be found at
 * http://oss.oracle.com/licenses/universal-foss-exception.
 *
 * This program 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, version 2.0,
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
 */

public class Main {
    /**
     * Interpret a BIT value as a long.
     * 
     * @param bytes
     *            byte buffer
     * @param offset
     *            offset in buffer
     * @param length
     *            number of bytes to use
     * @return long value
     */
    public static long bitToLong(byte[] bytes, int offset, int length) {
        long valueAsLong = 0;
        for (int i = 0; i < length; i++) {
            valueAsLong = valueAsLong << 8 | bytes[offset + i] & 0xff;
        }
        return valueAsLong;
    }
}

Related

1. bitStringToInt(String bits, char one)
2. bitsUsed(long value)
3. bitTest(String value, int pos)
4. bitToBoolean(byte b)
5. bitToBoolean(final byte value, final int bitNbr)
6. bitToLong(byte[] bytes, int offset, int length)
7. bitValueHelper(final int index, final int[] data)
8. bitWiseAnd(final byte[] array1, final byte[] array2)