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// DeflaterOutputStream.java - Output filter for compressing.
/* Copyright (C) 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.util.zip;
import java.io.FilterOutputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* @author Tom Tromey
* @date May 17, 1999
*/
/* Written using on-line Java Platform 1.2 API Specification
* and JCL book.
* Believed complete and correct.
*/
public class DeflaterOutputStream extends FilterOutputStream
{
public void close () throws IOException
{
finish ();
out.close();
}
protected void deflate () throws IOException
{
while (true)
{
int len = def.deflate(buf, 0, buf.length);
if (len == 0 || len == -1)
break;
out.write(buf, 0, len);
}
}
public DeflaterOutputStream (OutputStream out)
{
this (out, new Deflater (), 512);
}
public DeflaterOutputStream (OutputStream out, Deflater defl)
{
this (out, defl, 512);
}
public DeflaterOutputStream(OutputStream out, Deflater defl, int bufsize)
{
super (out);
buf = new byte[bufsize];
def = defl;
}
public void finish () throws IOException
{
def.finish();
deflate ();
}
public void write (int bval) throws IOException
{
byte[] b = new byte[1];
b[0] = (byte) bval;
write (b, 0, 1);
}
public void write (byte[] buf, int off, int len) throws IOException
{
def.setInput (buf, off, len);
deflate ();
}
// The retrieval buffer.
protected byte[] buf;
// Deflater used to compress data.
protected Deflater def;
}
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