Java CRC Calculate crcUpdate(int old, int value)

Description

crc Update

License

Apache License

Declaration

public static int crcUpdate(int old, int value) 

Method Source Code

//package com.java2s;
/**/*from w w w .  ja  v a  2 s. c  om*/
 * Copyright (C) 2015-2016 Jeeva Kandasamy (jkandasa@gmail.com)
 *
 * 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.
 */

public class Main {
    public static int crcUpdate(int old, int value) {
        int c = old ^ value;
        for (int i = 0; i < 8; ++i) {
            if ((c & 1) > 0)
                c = ((c >> 1) ^ 0xA001);
            else
                c = (c >> 1);
        }
        return c;
    }
}

Related

1. crc64(String value)
2. crc8(byte data, byte crcInit, byte poly)
3. crc8(String value)
4. crc8_tab(byte data, byte crcInit)
5. crc8PushByte(int[] crc, byte add)