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/*=========================================================================
Program: Visualization Toolkit
Module: vtkInputStream.cxx
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.
=========================================================================*/
#include "vtkInputStream.h"
#include "vtkObjectFactory.h"
vtkStandardNewMacro(vtkInputStream);
//----------------------------------------------------------------------------
vtkInputStream::vtkInputStream()
{
this->Stream = 0;
}
//----------------------------------------------------------------------------
vtkInputStream::~vtkInputStream()
{
this->SetStream(0);
}
//----------------------------------------------------------------------------
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();
}
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