cvs commit: xml-xalan/java/src/org/apache/xpath/compiler OpMapVector.java

[il...@apache.org]

ilene       2002/10/07 08:30:30

  Added:       java/src/org/apache/xpath/compiler OpMapVector.java
  Log:
  Patch for bugzilla #5046.
  
  Revision  Changes    Path
  1.1                  xml-xalan/java/src/org/apache/xpath/compiler/OpMapVector.java
  
  Index: OpMapVector.java
  ===================================================================
  /*
   * The Apache Software License, Version 1.1
   *
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:  
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Xalan" and "Apache Software Foundation" must
   *    not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation and was
   * originally based on software copyright (c) 1999, Lotus
   * Development Corporation., http://www.lotus.com.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  package org.apache.xpath.compiler;
  
  /**
   * <meta name="usage" content="internal"/>
   * 
   * 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.
   */
  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 node object to set
     * @param index Index of where to set the object
     */
    public final void setElementAt(int value, int index)
    {
      if (index >= m_mapSize)
      {
        m_mapSize += m_blocksize;
  
        int newMap[] = new int[m_mapSize];
  
        System.arraycopy(m_map, 0, newMap, 0, m_map[m_lengthPos]);
  
        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;
      
    }  
  
  }
  
  
  

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