Swap.h

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00001 /***************************************************************************
00002  *   Copyright (c) 2005 Imetric 3D GmbH                                    *
00003  *                                                                         *
00004  *   This file is part of the FreeCAD CAx development system.              *
00005  *                                                                         *
00006  *   This library is free software; you can redistribute it and/or         *
00007  *   modify it under the terms of the GNU Library General Public           *
00008  *   License as published by the Free Software Foundation; either          *
00009  *   version 2 of the License, or (at your option) any later version.      *
00010  *                                                                         *
00011  *   This library  is distributed in the hope that it will be useful,      *
00012  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00014  *   GNU Library General Public License for more details.                  *
00015  *                                                                         *
00016  *   You should have received a copy of the GNU Library General Public     *
00017  *   License along with this library; see the file COPYING.LIB. If not,    *
00018  *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
00019  *   Suite 330, Boston, MA  02111-1307, USA                                *
00020  *                                                                         *
00021  ***************************************************************************/
00022 
00023 
00024 #ifndef BASE_SWAP_H
00025 #define BASE_SWAP_H
00026 
00027 #define LOW_ENDIAN      (unsigned short) 0x4949 
00028 #define HIGH_ENDIAN     (unsigned short) 0x4D4D 
00029 
00030 
00031 namespace Base {
00032 
00039 unsigned short SwapOrder (void);
00040 
00041 void SwapVar (char&);
00042 void SwapVar (unsigned char&);
00043 void SwapVar (short&);
00044 void SwapVar (unsigned short&);
00045 void SwapVar (long&);
00046 void SwapVar (unsigned long&);
00047 void SwapVar (float&);
00048 void SwapVar (double&);
00049 
00050 template <class T>
00051 void SwapEndian(T& v)
00052 {
00053   T tmp = v;
00054   int i;
00055 
00056   for (i = 0; i < (int)sizeof (T); i++)
00057     *(((char*) &tmp) + i) = *(((char*) &v) + sizeof (T) - i - 1);
00058   v = tmp;
00059 }
00060 
00061 } // namespace Base
00062 
00063 
00064 #endif // BASE_SWAP_H