Java ByteBuffer Endian decodeLittleEndianVarInt(ByteBuffer buffer)

Description

decode Little Endian Var Int

License

Apache License

Declaration

public static int decodeLittleEndianVarInt(ByteBuffer buffer) 

Method Source Code

//package com.java2s;
/**//from w  w w.jav a2s. c o m
 *  Copyright 2011 Rapleaf
 *
 *  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 decodeLittleEndianVarInt(ByteBuffer buffer) {
        byte b = buffer.get();
        int result = b & 0x7f;
        if ((b & 0x80) > 0) {
            b = buffer.get();
            result |= ((b & 0x7f) << 7);
            if ((b & 0x80) > 0) {
                b = buffer.get();
                result |= ((b & 0x7f) << 14);
                if ((b & 0x80) > 0) {
                    b = buffer.get();
                    result |= ((b & 0x7f) << 21);
                    if ((b & 0x80) > 0) {
                        b = buffer.get();
                        result |= ((b & 0x07) << 28);
                    }
                }
            }
        }
        return result;
    }
}

Related

1. assertByteOrderLittleEndian(ByteBuffer buffer)
2. convertLittleEndianLong(ByteBuffer buff, int size)
3. decodeLittleEndianFixedWidthLong(ByteBuffer buffer)
4. extractInt(ByteBuffer header_buf, boolean bigEndian)
5. extractShort(ByteBuffer buffer, boolean bigEndian)
6. inLittleEndianOrder(ByteBuffer buf)
7. swapEndian16(ByteBuffer buf)