Java ByteBuffer Set updateChecksum(CRC32 checksum, ByteBuffer buffer, int offset, int length)

Description

Updates checksum with the provided ByteBuffer at the given offset + length.

License

Apache License

Declaration

public static void updateChecksum(CRC32 checksum, ByteBuffer buffer, int offset, int length) 

Method Source Code

//package com.java2s;
/*/*from   w  ww . ja  v a  2s.co  m*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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;

import java.util.zip.CRC32;

public class Main {
    /**
      * Updates checksum with the provided ByteBuffer at the given offset + length.
      * Resets position and limit back to their original values on return.
      * This method is *NOT* thread-safe.
      */
    public static void updateChecksum(CRC32 checksum, ByteBuffer buffer, int offset, int length) {
        int position = buffer.position();
        int limit = buffer.limit();

        buffer.position(offset).limit(offset + length);
        checksum.update(buffer);

        buffer.position(position).limit(limit);
    }

    /**
     * Updates checksum with the provided ByteBuffer.
     * Resets position back to its original values on return.
     * This method is *NOT* thread-safe.
     */
    public static void updateChecksum(CRC32 checksum, ByteBuffer buffer) {
        int position = buffer.position();
        checksum.update(buffer);
        buffer.position(position);
    }
}

Related

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2. setUnsignedInt32(ByteBuffer buffer, int offset, long value)
3. setZipEocdCentralDirectoryOffset(ByteBuffer zipEndOfCentralDirectory, long offset)
4. subsequence(ByteBuffer[] bs, int offset, int length)
5. substringBetweenLast(final byte[] text, final int offset, final int limit, final byte[] start, final byte[] end, final boolean trim, ByteBuffer bb)
6. validBytesUTF8(ByteBuffer buf, int offset, int limit)