vtkInputStream.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkInputStream_h
#define vtkInputStream_h
 
#include "vtkIOCoreModule.h" // For export macro
#include "vtkObject.h"
 
VTK_ABI_NAMESPACE_BEGIN
class VTKIOCORE_EXPORT vtkInputStream : public vtkObject
{
public:
  vtkTypeMacro(vtkInputStream, vtkObject);
  static vtkInputStream* New();
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetMacro(Stream, istream*);
  vtkGetMacro(Stream, istream*);

  virtual void StartReading();

  virtual int Seek(vtkTypeInt64 offset);

  virtual size_t Read(void* data, size_t length);

  virtual void EndReading();
 
protected:
  vtkInputStream();
  ~vtkInputStream() override;
 
  // The real input stream.
  istream* Stream;
  size_t ReadStream(char* data, size_t length);
 
  // The input stream's position when StartReading was called.
  vtkTypeInt64 StreamStartPosition;
 
private:
  vtkInputStream(const vtkInputStream&) = delete;
  void operator=(const vtkInputStream&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif