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BitOps.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
00003  * 
00004  * Copyright (c) 1999-2000 The Apache Software Foundation.  All rights
00005  * reserved.
00006  * 
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  * 
00011  * 1. Redistributions of source code must retain the above copyright
00012  *    notice, this list of conditions and the following disclaimer. 
00013  * 
00014  * 2. Redistributions in binary form must reproduce the above copyright
00015  *    notice, this list of conditions and the following disclaimer in
00016  *    the documentation and/or other materials provided with the
00017  *    distribution.
00018  * 
00019  * 3. The end-user documentation included with the redistribution,
00020  *    if any, must include the following acknowledgment:  
00021  *       "This product includes software developed by the
00022  *        Apache Software Foundation (http://www.apache.org/)."
00023  *    Alternately, this acknowledgment may appear in the software itself,
00024  *    if and wherever such third-party acknowledgments normally appear.
00025  * 
00026  * 4. The names "Xerces" and "Apache Software Foundation" must
00027  *    not be used to endorse or promote products derived from this
00028  *    software without prior written permission. For written 
00029  *    permission, please contact apache\@apache.org.
00030  * 
00031  * 5. Products derived from this software may not be called "Apache",
00032  *    nor may "Apache" appear in their name, without prior written
00033  *    permission of the Apache Software Foundation.
00034  * 
00035  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00036  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00037  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00038  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00039  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00040  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00041  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00042  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00043  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00044  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00045  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00046  * SUCH DAMAGE.
00047  * ====================================================================
00048  * 
00049  * This software consists of voluntary contributions made by many
00050  * individuals on behalf of the Apache Software Foundation, and was
00051  * originally based on software copyright (c) 1999, International
00052  * Business Machines, Inc., http://www.ibm.com .  For more information
00053  * on the Apache Software Foundation, please see
00054  * <http://www.apache.org/>.
00055  */
00056 
00057 /*
00058  * $Log: BitOps.hpp,v $
00059  * Revision 1.6  2000/03/02 19:54:38  roddey
00060  * This checkin includes many changes done while waiting for the
00061  * 1.1.0 code to be finished. I can't list them all here, but a list is
00062  * available elsewhere.
00063  *
00064  * Revision 1.5  2000/02/24 20:05:24  abagchi
00065  * Swat for removing Log from API docs
00066  *
00067  * Revision 1.4  2000/02/17 22:49:17  aruna1
00068  * Added comment on mask
00069  *
00070  * Revision 1.3  2000/02/17 22:32:45  aruna1
00071  * Masking changes made due to swap of 16bit to 32 bit
00072  *
00073  * Revision 1.2  2000/02/06 07:48:01  rahulj
00074  * Year 2K copyright swat.
00075  *
00076  * Revision 1.1.1.1  1999/11/09 01:04:08  twl
00077  * Initial checkin
00078  *
00079  * Revision 1.3  1999/11/08 20:45:05  rahul
00080  * Swat for adding in Product name and CVS comment log variable.
00081  *
00082  */
00083 
00084 #if !defined(BITOPS_HPP)
00085 #define BITOPS_HPP
00086 
00087 #include <util/XercesDefs.hpp>
00088 
00089 
00090 class  BitOps
00091 {
00092 public:
00093     // -----------------------------------------------------------------------
00094     //  Public static methods
00095     // -----------------------------------------------------------------------
00096     static inline XMLCh swapBytes(const XMLUInt16 toSwap)
00097     {
00098         //The mask is required to overcome a compiler error on solaris 
00099         return XMLCh(((toSwap >> 8) | (toSwap << 8)) & 0xFFFF);
00100     }
00101 
00102     static inline unsigned int swapBytes(const XMLUInt32 toSwap)
00103     {
00104         return
00105         (
00106             (toSwap >> 24)
00107             | (toSwap << 24)
00108             | ((toSwap & 0xFF00) << 8)
00109             | ((toSwap & 0xFF0000) >> 8)
00110         );
00111     }
00112 
00113 
00114 
00115 private :
00116     // -----------------------------------------------------------------------
00117     //  Unimplemented constructors and operators
00118     // -----------------------------------------------------------------------
00119     BitOps();
00120     BitOps(const BitOps&);
00121     void operator=(const BitOps);
00122 };
00123 
00124 #endif


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