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 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * 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.

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package com.sun.org.apache.xpath.internal.compiler;

/**

 *

 * Like IntVector, but used only for the OpMap array.  Length of array

 * is kept in the m_lengthPos position of the array.  Only the required methods

 * are in included here.

 * @xsl.usage internal

 */

public class OpMapVector {

 /** Size of blocks to allocate          */

  protected int m_blocksize;

  /** Array of ints          */

  protected int m_map[]; // IntStack is trying to see this directly

  /** Position where size of array is kept          */

  protected int m_lengthPos = 0;

  /** Size of array          */

  protected int m_mapSize;

    /**

   * Construct a OpMapVector, using the given block size.

   *

   * @param blocksize Size of block to allocate

   */

  public OpMapVector(int blocksize, int increaseSize, int lengthPos)

  {

    m_blocksize = increaseSize;

    m_mapSize = blocksize;

    m_lengthPos = lengthPos;

    m_map = new int[blocksize];

  }

  /**

   * Get the nth element.

   *

   * @param i index of object to get

   *

   * @return object at given index

   */

  public final int elementAt(int i)

  {

    return m_map[i];

  }

    /**

   * Sets the component at the specified index of this vector to be the

   * specified object. The previous component at that position is discarded.

   *

   * The index must be a value greater than or equal to 0 and less

   * than the current size of the vector.

   *

   * @param value object to set

   * @param index Index of where to set the object

   */

  public final void setElementAt(int value, int index)

  {

    if (index >= m_mapSize)

    {

      int oldSize = m_mapSize;

      m_mapSize += m_blocksize;

      int newMap[] = new int[m_mapSize];

      System.arraycopy(m_map, 0, newMap, 0, oldSize);

      m_map = newMap;

    }

    m_map[index] = value;

  }

  /*

   * Reset the array to the supplied size.  No checking is done.

   *

   * @param size The size to trim to.

   */

  public final void setToSize(int size) {

    int newMap[] = new int[size];

    System.arraycopy(m_map, 0, newMap, 0, m_map[m_lengthPos]);

    m_mapSize = size;

    m_map = newMap;

  }

}