/*
 * 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.spark.sql.catalyst.expressions;

import org.apache.spark.unsafe.Platform;

/**
 * General utilities available for unsafe data
 */
final class UnsafeDataUtils {

  private UnsafeDataUtils() {
  }

  public static byte[] getBytes(Object baseObject, long baseOffset, int sizeInBytes) {
    if (baseObject instanceof byte[]
      && baseOffset == Platform.BYTE_ARRAY_OFFSET
      && (((byte[]) baseObject).length == sizeInBytes)) {
      return (byte[]) baseObject;
    }
    byte[] bytes = new byte[sizeInBytes];
    Platform.copyMemory(baseObject, baseOffset, bytes, Platform.BYTE_ARRAY_OFFSET,
      sizeInBytes);
    return bytes;
  }
}
