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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkBase64InputStream.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 vtkBase64InputStream - Reads base64-encoded input from a stream.
// .SECTION Description
// vtkBase64InputStream implements base64 decoding with the
// vtkInputStream interface.
#ifndef __vtkBase64InputStream_h
#define __vtkBase64InputStream_h
#include "vtkInputStream.h"
class VTK_IO_EXPORT vtkBase64InputStream : public vtkInputStream
{
public:
vtkTypeRevisionMacro(vtkBase64InputStream,vtkInputStream);
static vtkBase64InputStream *New();
void PrintSelf(ostream& os, vtkIndent indent);
// 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.
void StartReading();
// Description:
// Seek to the given offset in the input data. Returns 1 for
// success, 0 for failure.
int Seek(unsigned long offset);
// Description:
// Read input data of the given length. Returns amount actually
// read.
unsigned long Read(unsigned 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.
void EndReading();
protected:
vtkBase64InputStream();
~vtkBase64InputStream();
// Number of decoded bytes left in Buffer from last call to Read.
int BufferLength;
unsigned char Buffer[2];
// Reads 4 bytes from the input stream and decodes them into 3 bytes.
int DecodeTriplet(unsigned char& c0, unsigned char& c1, unsigned char& c2);
private:
vtkBase64InputStream(const vtkBase64InputStream&); // Not implemented.
void operator=(const vtkBase64InputStream&); // Not implemented.
};
#endif
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