utils.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 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 "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", 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.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */


package org.apache.poi.hdf.extractor;

/**
 * Comment me
 *
 * @author Ryan Ackley 
 */

public class Utils
{

    public static short convertBytesToShort(byte firstByte, byte secondByte)
    {
        return (short)convertBytesToInt((byte)0, (byte)0, firstByte, secondByte);
    }
    public static int convertBytesToInt(byte firstByte, byte secondByte,
                                  byte thirdByte, byte fourthByte)
    {
        int firstInt = 0xff & firstByte;
        int secondInt = 0xff & secondByte;
        int thirdInt = 0xff & thirdByte;
        int fourthInt = 0xff & fourthByte;

        return (firstInt << 24) | (secondInt << 16) | (thirdInt << 8) | fourthInt;
    }
    public static short convertBytesToShort(byte[] array, int offset)
    {
        return convertBytesToShort(array[offset + 1], array[offset]);
    }
    public static int convertBytesToInt(byte[] array, int offset)
    {
        return convertBytesToInt(array[offset + 3], array[offset + 2], array[offset + 1], array[offset]);
    }
    public static int convertUnsignedByteToInt(byte b)
    {
        return (0xff & b);
    }
    public static char getUnicodeCharacter(byte[] array, int offset)
    {
      return (char)convertBytesToShort(array, offset);
    }

}