BitOps.hpp

/*
 * Copyright 1999-2000,2004 The Apache Software Foundation.
 * 
 * Licensed 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.
 */

/*
 * $Log$
 * Revision 1.4  2004/09/08 13:56:21  peiyongz
 * Apache License Version 2.0
 *
 * Revision 1.3  2003/03/07 18:11:54  tng
 * Return a reference instead of void for operator=
 *
 * Revision 1.2  2002/11/04 15:22:03  tng
 * C++ Namespace Support.
 *
 * Revision 1.1.1.1  2002/02/01 22:22:10  peiyongz
 * sane_include
 *
 * Revision 1.7  2000/09/06 00:24:15  andyh
 * Clean up misc compiler warnings
 *
 * Revision 1.6  2000/03/02 19:54:38  roddey
 * This checkin includes many changes done while waiting for the
 * 1.1.0 code to be finished. I can't list them all here, but a list is
 * available elsewhere.
 *
 * Revision 1.5  2000/02/24 20:05:24  abagchi
 * Swat for removing Log from API docs
 *
 * Revision 1.4  2000/02/17 22:49:17  aruna1
 * Added comment on mask
 *
 * Revision 1.3  2000/02/17 22:32:45  aruna1
 * Masking changes made due to swap of 16bit to 32 bit
 *
 * Revision 1.2  2000/02/06 07:48:01  rahulj
 * Year 2K copyright swat.
 *
 * Revision 1.1.1.1  1999/11/09 01:04:08  twl
 * Initial checkin
 *
 * Revision 1.3  1999/11/08 20:45:05  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */

#if !defined(BITOPS_HPP)
#define BITOPS_HPP

#include <xercesc/util/XercesDefs.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class XMLUTIL_EXPORT BitOps
{
public:
    // -----------------------------------------------------------------------
    //  Public static methods
    // -----------------------------------------------------------------------
    static inline XMLCh swapBytes(const XMLUInt16 toSwap)
    {
        //The mask is required to overcome a compiler error on solaris
        return XMLCh(((toSwap >> 8) | (toSwap << 8)) & 0xFFFF);
    }

    static inline unsigned int swapBytes(const XMLUInt32 toSwap)
    {
        return
        (
            (toSwap >> 24)
            | (toSwap << 24)
            | ((toSwap & 0xFF00) << 8)
            | ((toSwap & 0xFF0000) >> 8)
        );
    }



protected :
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators.  (These ought to be private,
    //                                  but that produces spurious compiler warnings
    //                                  on some platforms.)
    // -----------------------------------------------------------------------
    BitOps();
    BitOps(const BitOps&);
    BitOps& operator=(const BitOps&);
};

XERCES_CPP_NAMESPACE_END

#endif