vtkInputStream.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkInputStream.h,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef __vtkInputStream_h
#define __vtkInputStream_h

#include "vtkObject.h"

class VTK_IO_EXPORT vtkInputStream : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkInputStream,vtkObject);
  static vtkInputStream *New();
  void PrintSelf(ostream& os, vtkIndent indent);
  
  //BTX

  vtkSetMacro(Stream, istream*);
  vtkGetMacro(Stream, istream*);
  //ETX
  
  virtual void StartReading();
  
  virtual int Seek(unsigned long offset);
  

  virtual unsigned long Read(unsigned char* data, unsigned long length);
  unsigned long Read(char* data, unsigned long length);
  
  virtual void EndReading();
  
protected:
  vtkInputStream();
  ~vtkInputStream();  
  
  // The real input stream.
  istream* Stream;
  
  // The input stream's position when StartReading was called.
  unsigned long StreamStartPosition;
  
private:
  vtkInputStream(const vtkInputStream&);  // Not implemented.
  void operator=(const vtkInputStream&);  // Not implemented.
};

#endif

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