EndianConversion.h

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//==============================================================================================
//  FILENAME    :   EndianConversion.h
//  AUTHOR      :   Yuan Ding
//  CREATION    :   07/16/2002
//  Copyright (C) MicroStrategy Incorporated 1999
//  All Rights Reserved
//==============================================================================================
#ifndef MBase_EndianConversion_h
#define MBase_EndianConversion_h

#include "Base/Defines/BasicTypes.h"
#include "Base/Base/System.h"

namespace MBase
{

    template<class T> inline T ConvertEndian(T iData)
    {
        if (IsBigEndian())
        {
            unsigned long lnDataSize = sizeof(T);
            unsigned char* lpByte = (unsigned char*)(&iData);
            unsigned char lpTemp = 0;
            for (unsigned Int32 idxByte = 0; idxByte < lnDataSize/2; idxByte++) 
            {
                lpTemp = *(lpByte+idxByte);
                *(lpByte+idxByte) = *(lpByte+lnDataSize-idxByte-1);
                *(lpByte+lnDataSize-idxByte-1) = lpTemp;
            }           
        }
        
        return iData;
    }

#ifdef GUID_DEFINED

    inline void EndianConvertGUID(::GUID &irGUID)
    {
        if (IsBigEndian())
        {   
            irGUID.Data1 = ConvertEndian<unsigned Int32>(irGUID.Data1);
            irGUID.Data2 = ConvertEndian<unsigned short>(irGUID.Data2);
            irGUID.Data3 = ConvertEndian<unsigned short>(irGUID.Data3);
        }   
    }

#endif // GUID_DEFINED
}

#endif // MBase_EndianConversion_h