Java ByteBuffer to Int readUnsigned(ByteBuffer in, int size)

Description

read Unsigned

License

Apache License

Declaration

public static int readUnsigned(ByteBuffer in, int size) 

Method Source Code

//package com.java2s;
/*// w w w  . j av  a  2  s  .  com
 * Copyright 2013-2014 eBay Software Foundation
 *
 * 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.
 */

import java.nio.ByteBuffer;

public class Main {
    public static int readUnsigned(byte[] bytes, int offset, int size) {
        int integer = 0;
        for (int i = offset, n = offset + size; i < n; i++) {
            integer <<= 8;
            integer |= (int) bytes[i] & 0xFF;
        }
        return integer;
    }

    public static int readUnsigned(ByteBuffer in, int size) {
        int integer = 0;
        int mask = 0xff;
        int shift = 0;
        for (int i = 0; i < size; i++) {
            integer |= (in.get() << shift) & mask;
            mask = mask << 8;
            shift += 8;
        }
        return integer;
    }
}

Related

1. readIntLE(ByteBuffer buf, int i)
2. readIntMSB(ByteBuffer logBuf)
3. readIntoBuffer(SocketChannel channel, ByteBuffer buf, int sleepMsecs)
4. readInts(final ByteBuffer bb, final int length)
5. readInts4(final ByteBuffer buffer, final int[] array, final int count)
6. readUnsignedByte(ByteBuffer buffer)
7. readUnsignedInt(ByteBuffer buf)
8. readUnsignedInt(ByteBuffer buffer)
9. readUnsignedInt(ByteBuffer buffer, int index)