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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
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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