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125 lines
4.8 KiB
125 lines
4.8 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkByteSwap.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkByteSwap - perform machine dependent byte swapping
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// .SECTION Description
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// vtkByteSwap is used by other classes to perform machine dependent byte
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// swapping. Byte swapping is often used when reading or writing binary
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// files.
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#ifndef __vtkByteSwap_h
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#define __vtkByteSwap_h
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#include "vtkObject.h"
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class VTK_COMMON_EXPORT vtkByteSwap : public vtkObject
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{
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public:
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static vtkByteSwap *New();
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vtkTypeRevisionMacro(vtkByteSwap,vtkObject);
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//BTX
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// Description:
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// Type-safe swap signatures to swap for storage in either Little
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// Endian or Big Endian format. Swapping is performed according to
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// the true size of the type given.
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#define VTK_BYTE_SWAP_DECL(T) \
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static void SwapLE(T* p); \
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static void SwapBE(T* p); \
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static void SwapLERange(T* p, vtkIdType num); \
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static void SwapBERange(T* p, vtkIdType num); \
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static void SwapLERangeWrite(const T* p, vtkIdType num, FILE* file); \
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static void SwapBERangeWrite(const T* p, vtkIdType num, FILE* file); \
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static void SwapLERangeWrite(const T* p, vtkIdType num, ostream* os); \
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static void SwapBERangeWrite(const T* p, vtkIdType num, ostream* os)
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VTK_BYTE_SWAP_DECL(float);
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VTK_BYTE_SWAP_DECL(double);
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VTK_BYTE_SWAP_DECL(char);
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VTK_BYTE_SWAP_DECL(short);
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VTK_BYTE_SWAP_DECL(int);
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VTK_BYTE_SWAP_DECL(long);
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VTK_BYTE_SWAP_DECL(signed char);
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VTK_BYTE_SWAP_DECL(unsigned char);
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VTK_BYTE_SWAP_DECL(unsigned short);
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VTK_BYTE_SWAP_DECL(unsigned int);
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VTK_BYTE_SWAP_DECL(unsigned long);
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#if defined(VTK_DECL_USE_LONG_LONG)
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VTK_BYTE_SWAP_DECL(long long);
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VTK_BYTE_SWAP_DECL(unsigned long long);
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#endif
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#if defined(VTK_DECL_USE___INT64)
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VTK_BYTE_SWAP_DECL(__int64);
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VTK_BYTE_SWAP_DECL(unsigned __int64);
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#endif
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#undef VTK_BYTE_SWAP_DECL
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//ETX
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// Description:
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// Swap 2, 4, or 8 bytes for storage as Little Endian.
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static void Swap2LE(void* p);
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static void Swap4LE(void* p);
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static void Swap8LE(void* p);
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// Description:
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// Swap a block of 2-, 4-, or 8-byte segments for storage as Little Endian.
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static void Swap2LERange(void* p, int num);
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static void Swap4LERange(void* p, int num);
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static void Swap8LERange(void* p, int num);
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// Description:
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// Swap a block of 2-, 4-, or 8-byte segments for storage as Little Endian.
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// The results are written directly to a file to avoid temporary storage.
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static void SwapWrite2LERange(const void* p, int num, FILE* f);
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static void SwapWrite4LERange(const void* p, int num, FILE* f);
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static void SwapWrite8LERange(const void* p, int num, FILE* f);
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static void SwapWrite2LERange(const void* p, int num, ostream* os);
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static void SwapWrite4LERange(const void* p, int num, ostream* os);
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static void SwapWrite8LERange(const void* p, int num, ostream* os);
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// Description:
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// Swap 2, 4, or 8 bytes for storage as Big Endian.
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static void Swap2BE(void* p);
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static void Swap4BE(void* p);
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static void Swap8BE(void* p);
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// Description:
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// Swap a block of 2-, 4-, or 8-byte segments for storage as Big Endian.
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static void Swap2BERange(void* p, int num);
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static void Swap4BERange(void* p, int num);
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static void Swap8BERange(void* p, int num);
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// Description:
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// Swap a block of 2-, 4-, or 8-byte segments for storage as Big Endian.
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// The results are written directly to a file to avoid temporary storage.
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static void SwapWrite2BERange(const void* p, int num, FILE* f);
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static void SwapWrite4BERange(const void* p, int num, FILE* f);
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static void SwapWrite8BERange(const void* p, int num, FILE* f);
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static void SwapWrite2BERange(const void* p, int num, ostream* os);
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static void SwapWrite4BERange(const void* p, int num, ostream* os);
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static void SwapWrite8BERange(const void* p, int num, ostream* os);
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// Description:
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// Swaps the bytes of a buffer. Uses an arbitrary word size, but
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// assumes the word size is divisible by two.
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static void SwapVoidRange(void *buffer, int numWords, int wordSize);
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protected:
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vtkByteSwap();
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~vtkByteSwap();
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private:
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vtkByteSwap(const vtkByteSwap&); // Not implemented.
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void operator=(const vtkByteSwap&); // Not implemented.
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};
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#endif
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