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Common/vtkByteSwap.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkByteSwap.h,v $
  Language:  C++


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 

All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * 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.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS 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 AUTHORS OR 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.

=========================================================================*/
#ifndef __vtkByteSwap_h
#define __vtkByteSwap_h

#include "vtkObject.h"

class VTK_COMMON_EXPORT vtkByteSwap : public vtkObject
{
public:
  static vtkByteSwap *New();
  vtkTypeMacro(vtkByteSwap,vtkObject);


  static void Swap2LE(short *s);
  static void Swap2LE(unsigned short *s);


  static void Swap4LE(char *c);
  static void Swap4LE(float *p) { vtkByteSwap::Swap4LE((char *)p);};
  static void Swap4LE(int *i)   { vtkByteSwap::Swap4LE((char *)i);};
  static void Swap4LE(unsigned long *i) { vtkByteSwap::Swap4LE((char *)i);};
  static void Swap4LE(long *i) { vtkByteSwap::Swap4LE((char *)i);};


  static void Swap8LE(char *c);
  static void Swap8LE(double *d) { vtkByteSwap::Swap8LE((char *)d);};


  static void Swap2LERange(char *c,int num);
  static void Swap2LERange(short *i,int num) 
  { vtkByteSwap::Swap2LERange((char *)i,num);};


  static void Swap4LERange(char *c,int num);
  static void Swap4LERange(unsigned char *c,int num) 
  { vtkByteSwap::Swap4LERange((char *)c,num);};
  static void Swap4LERange(float *p,int num) 
  { vtkByteSwap::Swap4LERange((char *)p,num);};
  static void Swap4LERange(int *i,int num) 
  { vtkByteSwap::Swap4LERange((char *)i,num);};
  static void Swap4LERange(unsigned long *i,int num) 
  { vtkByteSwap::Swap4LERange((char *)i,num);};


  static void Swap8LERange(char *c, int num);
  static void Swap8LERange(double *d, int num) 
  { vtkByteSwap::Swap8LERange((char *)d, num);};


  static void Swap2BE(short *s);
  static void Swap2BE(unsigned short *s);


  static void Swap4BE(char *c);
  static void Swap4BE(float *p) { vtkByteSwap::Swap4BE((char *)p);};
  static void Swap4BE(int *i)   { vtkByteSwap::Swap4BE((char *)i);};
  static void Swap4BE(unsigned long *i) { vtkByteSwap::Swap4BE((char *)i);};


  static void Swap8BE(char *c);
  static void Swap8BE(double *d) { vtkByteSwap::Swap8BE((char *)d);};


  static void Swap2BERange(char *c,int num);
  static void Swap2BERange(short *i,int num) 
  { vtkByteSwap::Swap2BERange((char *)i,num);};


  static void Swap4BERange(char *c,int num);
  static void Swap4BERange(float *p,int num) 
  { vtkByteSwap::Swap4BERange((char *)p,num); };
  static void Swap4BERange(int *i,int num) 
  { vtkByteSwap::Swap4BERange((char *)i,num); };
  static void Swap4BERange(unsigned long *i,int num) 
  { vtkByteSwap::Swap4BERange((char *)i,num); };

#ifdef VTK_USE_64BIT_IDS
  static void Swap4BERange(vtkIdType *i,int num) 
  { vtkByteSwap::Swap4BERange((char *)i,num); };
#endif


  static void Swap8BERange(char *c,int num);
  static void Swap8BERange(double *d,int num) 
  { vtkByteSwap::Swap8BERange((char *)d,num); };


  static void SwapWrite2BERange(char *c,int num,FILE *fp);
  static void SwapWrite2BERange(short *i,int num, FILE *fp) 
  {vtkByteSwap::SwapWrite2BERange((char *)i,num,fp);};


  static void SwapWrite4BERange(char *c,int num,FILE *fp);
  static void SwapWrite4BERange(float *p,int num, FILE *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)p,num,fp);};
  static void SwapWrite4BERange(int *i,int num,FILE *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
  static void SwapWrite4BERange(unsigned long *i,int num, FILE *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
#ifdef VTK_USE_64BIT_IDS
  static void SwapWrite4BERange(vtkIdType *i,int num, FILE *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
#endif


  static void SwapWrite8BERange(char *c,int num,FILE *fp);
  static void SwapWrite8BERange(double *d,int num, FILE *fp) 
  { vtkByteSwap::SwapWrite8BERange((char *)d,num,fp);};


  static void SwapWrite2BERange(char *c,int num, ostream *fp);
  static void SwapWrite2BERange(short *i,int num, ostream *fp) 
  {vtkByteSwap::SwapWrite2BERange((char *)i,num,fp);};


  static void SwapWrite4BERange(char *c,int num, ostream *fp);
  static void SwapWrite4BERange(float *p,int num, ostream *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)p,num,fp);};
  static void SwapWrite4BERange(int *i,int num, ostream *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
  static void SwapWrite4BERange(unsigned long *i,int num, ostream *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
#ifdef VTK_USE_64BIT_IDS
  static void SwapWrite4BERange(vtkIdType *i,int num, ostream *fp) 
  { vtkByteSwap::SwapWrite4BERange((char *)i,num,fp);};
#endif


  static void SwapWrite8BERange(char *c,int num, ostream *fp);
  static void SwapWrite8BERange(double *d,int num, ostream *fp) 
  { vtkByteSwap::SwapWrite8BERange((char *)d,num,fp);};

  static void SwapVoidRange(void *buffer, int numWords, int wordSize);


protected:
  vtkByteSwap() {};
  ~vtkByteSwap() {};

private:
  static void Swap2Bytes(char* &data);

  static void Swap4Bytes(char* &data);
 
  static void Swap8Bytes(char* &data);

private:
  vtkByteSwap(const vtkByteSwap&);  // Not implemented.
  void operator=(const vtkByteSwap&);  // Not implemented.
};


inline void 
vtkByteSwap::Swap2Bytes(char* &data)
{ 
  char one_byte;  
  one_byte = data[0]; data[0] = data[1]; data[1] = one_byte;
}

inline void 
vtkByteSwap::Swap4Bytes(char* &data)
{ 
  char one_byte; 
  one_byte = data[0]; data[0] = data[3]; data[3] = one_byte;
  one_byte = data[1]; data[1] = data[2]; data[2] = one_byte; 
}

inline void 
vtkByteSwap::Swap8Bytes(char* &data)
{ 
  char one_byte;
  one_byte = data[0]; data[0] = data[7]; data[7] = one_byte;
  one_byte = data[1]; data[1] = data[6]; data[6] = one_byte;
  one_byte = data[2]; data[2] = data[5]; data[5] = one_byte;
  one_byte = data[3]; data[3] = data[4]; data[4] = one_byte; 
}

#endif

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