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IO/vtkInputStream.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkInputStream.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00040 #ifndef __vtkInputStream_h
00041 #define __vtkInputStream_h
00042 
00043 #include "vtkObject.h"
00044 
00045 class VTK_IO_EXPORT vtkInputStream : public vtkObject
00046 {
00047 public:
00048   vtkTypeRevisionMacro(vtkInputStream,vtkObject);
00049   static vtkInputStream *New();
00050   void PrintSelf(ostream& os, vtkIndent indent);
00051   
00052   //BTX
00054   /*! Get/Set the real input stream. */
00055   vtkSetMacro(Stream, istream*);
00056   vtkGetMacro(Stream, istream*);
00057   //ETX
00059   
00063   virtual void StartReading();
00064   
00067   virtual int Seek(unsigned long offset);
00068   
00070 
00071   virtual unsigned long Read(unsigned char* data, unsigned long length);
00072   unsigned long Read(char* data, unsigned long length);
00074   
00079   virtual void EndReading();
00080   
00081 protected:
00082   vtkInputStream();
00083   ~vtkInputStream();  
00084   
00085   // The real input stream.
00086   istream* Stream;
00087   
00088   // The input stream's position when StartReading was called.
00089   unsigned long StreamStartPosition;
00090   
00091 private:
00092   vtkInputStream(const vtkInputStream&);  // Not implemented.
00093   void operator=(const vtkInputStream&);  // Not implemented.
00094 };
00095 
00096 #endif