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136 lines
4.3 KiB
136 lines
4.3 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkBase64OutputStream.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkBase64OutputStream.h"
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#include "vtkObjectFactory.h"
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#include "vtkBase64Utilities.h"
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//----------------------------------------------------------------------------
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vtkCxxRevisionMacro(vtkBase64OutputStream, "$Revision: 1.4 $");
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vtkStandardNewMacro(vtkBase64OutputStream);
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//----------------------------------------------------------------------------
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vtkBase64OutputStream::vtkBase64OutputStream()
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{
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this->BufferLength = 0;
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}
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//----------------------------------------------------------------------------
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vtkBase64OutputStream::~vtkBase64OutputStream()
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{
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}
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//----------------------------------------------------------------------------
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void vtkBase64OutputStream::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os, indent);
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}
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//----------------------------------------------------------------------------
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inline int vtkBase64OutputStream::EncodeTriplet(unsigned char c0,
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unsigned char c1,
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unsigned char c2)
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{
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// Encodes 3 bytes into 4 bytes and writes them to the output stream.
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unsigned char out[4];
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vtkBase64Utilities::EncodeTriplet(c0, c1, c2,
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&out[0], &out[1], &out[2], &out[3]);
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return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
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}
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//----------------------------------------------------------------------------
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inline int vtkBase64OutputStream:: EncodeEnding(unsigned char c0,
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unsigned char c1)
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{
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// Encodes a 2-byte ending into 3 bytes and 1 pad byte and writes.
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unsigned char out[4];
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vtkBase64Utilities::EncodePair(c0, c1,
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&out[0], &out[1], &out[2], &out[3]);
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return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
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}
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//----------------------------------------------------------------------------
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inline int vtkBase64OutputStream::EncodeEnding(unsigned char c0)
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{
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// Encodes a 1-byte ending into 2 bytes and 2 pad bytes and writes.
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unsigned char out[4];
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vtkBase64Utilities::EncodeSingle(c0,
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&out[0], &out[1], &out[2], &out[3]);
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return (this->Stream->write(reinterpret_cast<char*>(out), 4)? 1:0);
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}
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//----------------------------------------------------------------------------
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int vtkBase64OutputStream::StartWriting()
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{
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if(!this->Superclass::StartWriting())
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{
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return 0;
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}
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this->BufferLength = 0;
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return 1;
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}
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//----------------------------------------------------------------------------
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int vtkBase64OutputStream::EndWriting()
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{
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if(this->BufferLength == 1)
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{
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if(!this->EncodeEnding(this->Buffer[0])) { return 0; }
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this->BufferLength = 0;
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}
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else if(this->BufferLength == 2)
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{
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if(!this->EncodeEnding(this->Buffer[0], this->Buffer[1])) { return 0; }
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this->BufferLength = 0;
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}
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return 1;
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}
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//----------------------------------------------------------------------------
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int vtkBase64OutputStream::Write(const unsigned char* data,
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unsigned long length)
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{
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unsigned long totalLength = this->BufferLength + length;
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const unsigned char* in = data;
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const unsigned char* end = data+length;
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if(totalLength >= 3)
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{
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if(this->BufferLength == 1)
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{
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if(!this->EncodeTriplet(this->Buffer[0], in[0], in[1])) { return 0; }
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in += 2;
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this->BufferLength = 0;
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}
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else if(this->BufferLength == 2)
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{
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if(!this->EncodeTriplet(this->Buffer[0], this->Buffer[1], in[0]))
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{ return 0; }
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in += 1;
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this->BufferLength = 0;
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}
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}
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while((end - in) >= 3)
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{
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if(!this->EncodeTriplet(in[0], in[1], in[2])) { return 0; }
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in += 3;
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}
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while(in != end)
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{
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this->Buffer[this->BufferLength++] = *in++;
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}
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return 1;
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}
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