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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBase64OutputStream.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 "vtkBase64OutputStream.h"
#include "vtkObjectFactory.h"
#include "vtkBase64Utilities.h"
//----------------------------------------------------------------------------
vtkStandardNewMacro(vtkBase64OutputStream);
//----------------------------------------------------------------------------
vtkBase64OutputStream::vtkBase64OutputStream()
{
this->BufferLength = 0;
}
//----------------------------------------------------------------------------
vtkBase64OutputStream::~vtkBase64OutputStream()
{
}
//----------------------------------------------------------------------------
void vtkBase64OutputStream::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//----------------------------------------------------------------------------
inline int vtkBase64OutputStream::EncodeTriplet(unsigned char c0,
unsigned char c1,
unsigned char c2)
{
// Encodes 3 bytes into 4 bytes and writes them to the output stream.
unsigned char out[4];
vtkBase64Utilities::EncodeTriplet(c0, c1, c2,
&out[0], &out[1], &out[2], &out[3]);
return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
}
//----------------------------------------------------------------------------
inline int vtkBase64OutputStream:: EncodeEnding(unsigned char c0,
unsigned char c1)
{
// Encodes a 2-byte ending into 3 bytes and 1 pad byte and writes.
unsigned char out[4];
vtkBase64Utilities::EncodePair(c0, c1,
&out[0], &out[1], &out[2], &out[3]);
return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
}
//----------------------------------------------------------------------------
inline int vtkBase64OutputStream::EncodeEnding(unsigned char c0)
{
// Encodes a 1-byte ending into 2 bytes and 2 pad bytes and writes.
unsigned char out[4];
vtkBase64Utilities::EncodeSingle(c0,
&out[0], &out[1], &out[2], &out[3]);
return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
}
//----------------------------------------------------------------------------
int vtkBase64OutputStream::StartWriting()
{
if(!this->Superclass::StartWriting())
{
return 0;
}
this->BufferLength = 0;
return 1;
}
//----------------------------------------------------------------------------
int vtkBase64OutputStream::EndWriting()
{
if(this->BufferLength == 1)
{
if(!this->EncodeEnding(this->Buffer[0])) { return 0; }
this->BufferLength = 0;
}
else if(this->BufferLength == 2)
{
if(!this->EncodeEnding(this->Buffer[0], this->Buffer[1])) { return 0; }
this->BufferLength = 0;
}
return 1;
}
//----------------------------------------------------------------------------
int vtkBase64OutputStream::Write(void const* data, size_t length)
{
size_t totalLength = this->BufferLength + length;
unsigned char const* in = static_cast<unsigned char const*>(data);
unsigned char const* end = in+length;
if(totalLength >= 3)
{
if(this->BufferLength == 1)
{
if(!this->EncodeTriplet(this->Buffer[0], in[0], in[1])) { return 0; }
in += 2;
this->BufferLength = 0;
}
else if(this->BufferLength == 2)
{
if(!this->EncodeTriplet(this->Buffer[0], this->Buffer[1], in[0]))
{ return 0; }
in += 1;
this->BufferLength = 0;
}
}
while((end - in) >= 3)
{
if(!this->EncodeTriplet(in[0], in[1], in[2])) { return 0; }
in += 3;
}
while(in != end)
{
this->Buffer[this->BufferLength++] = *in++;
}
return 1;
}
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