content: /*
   * 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.
   */
  
  package org.apache.celeborn.tez.plugin.util;
  
  import java.util.zip.CRC32;
  
  public class ChecksumUtils {
  
    private static final int LENGTH_PER_CRC = 4 * 1024;
  
    public static long getCrc32(byte[] buf) {
      return getCrc32(buf, 0, buf.length);
    }
  
    public static long getCrc32(byte[] buf, int offset, int length) {
      CRC32 crc32 = new CRC32();
  
      for (int i = 0; i < length; ) {
        int len = Math.min(LENGTH_PER_CRC, length - i);
        crc32.update(buf, i + offset, len);
        i += len;
      }
  
      return crc32.getValue();
    }
  }
  