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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkOutputStream
* @brief Wraps a binary output stream with a VTK interface.
*
* vtkOutputStream provides a VTK-style interface wrapping around a
* standard output stream. The access methods are virtual so that
* subclasses can transparently provide encoding of the output. Data
* lengths for Write calls refer to the length of the data in memory.
* The actual length in the stream may differ for subclasses that
* implement an encoding scheme.
*/
#ifndef vtkOutputStream_h
#define vtkOutputStream_h
#include "vtkIOCoreModule.h" // For export macro
#include "vtkObject.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKIOCORE_EXPORT vtkOutputStream : public vtkObject
{
public:
vtkTypeMacro(vtkOutputStream, vtkObject);
static vtkOutputStream* New();
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Get/Set the real output stream.
*/
vtkSetMacro(Stream, ostream*);
vtkGetMacro(Stream, ostream*);
///@}
/**
* Called after the stream position has been set by the caller, but
* before any Write calls. The stream position should not be
* adjusted by the caller until after an EndWriting call.
*/
virtual int StartWriting();
/**
* Write output data of the given length.
*/
virtual int Write(void const* data, size_t length);
/**
* Called after all desired calls to Write have been made. After
* this call, the caller is free to change the position of the
* stream. Additional writes should not be done until after another
* call to StartWriting.
*/
virtual int EndWriting();
protected:
vtkOutputStream();
~vtkOutputStream() override;
// The real output stream.
ostream* Stream;
int WriteStream(const char* data, size_t length);
private:
vtkOutputStream(const vtkOutputStream&) = delete;
void operator=(const vtkOutputStream&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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