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/*
* SVG Salamander
* Copyright (c) 2004, Mark McKay
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Mark McKay can be contacted at mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*/
package com.kitfox.svg.xml;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
*
* @author kitfox
*/
public class Base64OutputStream extends FilterOutputStream
{
int buf;
int numBytes;
int numChunks;
public Base64OutputStream(OutputStream out)
{
super(out);
}
public void flush() throws IOException
{
out.flush();
}
public void close() throws IOException
{
switch (numBytes)
{
case 1:
buf <<= 4;
out.write(getBase64Byte(1));
out.write(getBase64Byte(0));
out.write('=');
out.write('=');
break;
case 2:
buf <<= 2;
out.write(getBase64Byte(2));
out.write(getBase64Byte(1));
out.write(getBase64Byte(0));
out.write('=');
break;
case 3:
out.write(getBase64Byte(3));
out.write(getBase64Byte(2));
out.write(getBase64Byte(1));
out.write(getBase64Byte(0));
break;
default:
assert false;
}
out.close();
}
public void write(int b) throws IOException
{
buf = (buf << 8) | (0xff & b);
numBytes++;
if (numBytes == 3)
{
out.write(getBase64Byte(3));
out.write(getBase64Byte(2));
out.write(getBase64Byte(1));
out.write(getBase64Byte(0));
numBytes = 0;
numChunks++;
if (numChunks == 16)
{
// out.write('\r');
// out.write('\n');
numChunks = 0;
}
}
}
public byte getBase64Byte(int index)
{
return Base64Util.encodeByte((buf >> (index * 6)) & 0x3f);
}
}
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