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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkBase64OutputStream.h"
#include "vtkBase64Utilities.h"
#include "vtkObjectFactory.h"
//------------------------------------------------------------------------------
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkBase64OutputStream);
//------------------------------------------------------------------------------
vtkBase64OutputStream::vtkBase64OutputStream()
{
this->BufferLength = 0;
}
//------------------------------------------------------------------------------
vtkBase64OutputStream::~vtkBase64OutputStream() = default;
//------------------------------------------------------------------------------
void vtkBase64OutputStream::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
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);
}
//------------------------------------------------------------------------------
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);
}
//------------------------------------------------------------------------------
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;
}
VTK_ABI_NAMESPACE_END
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