vtkBase64InputStream.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkBase64InputStream_h
#define vtkBase64InputStream_h
 
#include "vtkIOCoreModule.h" // For export macro
#include "vtkInputStream.h"
 
VTK_ABI_NAMESPACE_BEGIN
class VTKIOCORE_EXPORT vtkBase64InputStream : public vtkInputStream
{
public:
  vtkTypeMacro(vtkBase64InputStream, vtkInputStream);
  static vtkBase64InputStream* New();
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void StartReading() override;
 
  int Seek(vtkTypeInt64 offset) override;
 
  size_t Read(void* data, size_t length) override;
 
  void EndReading() override;
 
protected:
  vtkBase64InputStream();
  ~vtkBase64InputStream() override;
 
  // 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&) = delete;
  void operator=(const vtkBase64InputStream&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif