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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkInputStream.h"
#include "vtkObjectFactory.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkInputStream);
//------------------------------------------------------------------------------
vtkInputStream::vtkInputStream()
{
this->Stream = nullptr;
}
//------------------------------------------------------------------------------
vtkInputStream::~vtkInputStream()
{
this->SetStream(nullptr);
}
//------------------------------------------------------------------------------
void vtkInputStream::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Stream: " << (this->Stream ? "set" : "none") << "\n";
}
//------------------------------------------------------------------------------
void vtkInputStream::StartReading()
{
if (!this->Stream)
{
vtkErrorMacro("StartReading() called with no Stream set.");
return;
}
this->StreamStartPosition = this->Stream->tellg();
}
//------------------------------------------------------------------------------
void vtkInputStream::EndReading() {}
//------------------------------------------------------------------------------
int vtkInputStream::Seek(vtkTypeInt64 offset)
{
std::streamoff off = static_cast<std::streamoff>(this->StreamStartPosition + offset);
return (this->Stream->seekg(off, std::ios::beg) ? 1 : 0);
}
//------------------------------------------------------------------------------
size_t vtkInputStream::Read(void* data, size_t length)
{
return this->ReadStream(static_cast<char*>(data), length);
}
//------------------------------------------------------------------------------
size_t vtkInputStream::ReadStream(char* data, size_t length)
{
this->Stream->read(data, length);
return this->Stream->gcount();
}
VTK_ABI_NAMESPACE_END
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