You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.7 KiB
82 lines
2.7 KiB
/*=========================================================================
|
|
|
|
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.
|
|
|
|
=========================================================================*/
|
|
// .NAME vtkInputStream - Wraps a binary input stream with a VTK interface.
|
|
// .SECTION Description
|
|
// vtkInputStream provides a VTK-style interface wrapping around a
|
|
// standard input stream. The access methods are virtual so that
|
|
// subclasses can transparently provide decoding of an encoded stream.
|
|
// Data lengths for Seek and Read calls refer to the length of the
|
|
// input data. The actual length in the stream may differ for
|
|
// subclasses that implement an encoding scheme.
|
|
|
|
#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
|
|
// Description:
|
|
// Get/Set the real input stream.
|
|
vtkSetMacro(Stream, istream*);
|
|
vtkGetMacro(Stream, istream*);
|
|
//ETX
|
|
|
|
// Description:
|
|
// Called after the stream position has been set by the caller, but
|
|
// before any Seek or Read calls. The stream position should not be
|
|
// adjusted by the caller until after an EndReading call.
|
|
virtual void StartReading();
|
|
|
|
// Description:
|
|
// Seek to the given offset in the input data. Returns 1 for
|
|
// success, 0 for failure.
|
|
virtual int Seek(unsigned long offset);
|
|
|
|
// Description:
|
|
// Read input data of the given length. Returns amount actually
|
|
// read.
|
|
virtual unsigned long Read(unsigned char* data, unsigned long length);
|
|
unsigned long Read(char* data, unsigned long length);
|
|
|
|
// Description:
|
|
// Called after all desired calls to Seek and Read have been made.
|
|
// After this call, the caller is free to change the position of the
|
|
// stream. Additional reads should not be done until after another
|
|
// call to StartReading.
|
|
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
|
|
|