inflater.java

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/* Inflater.java - Decompress a data stream
   Copyright (C) 1999, 2000 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

package java.util.zip;

import gnu.gcj.RawData;

/**
 * @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 Inflater
{
  public native void end ();

  protected void finalize ()
  {
    end ();
  }

  public synchronized boolean finished ()
  {
    return is_finished;
  }

  public native int getAdler ();
  public native int getRemaining ();
  public native int getTotalIn ();
  public native int getTotalOut ();

  public int inflate (byte[] buf) throws DataFormatException
  {
    return inflate (buf, 0, buf.length);
  }

  public native int inflate (byte[] buf, int off, int len)
    throws DataFormatException;

  private native void init (boolean noHeader);

  public Inflater ()
  {
    this (false);
  }

  public Inflater (boolean noHeader)
  {
    init (noHeader);
  }

  public synchronized boolean needsDictionary ()
  {
    return dict_needed;
  }

  public synchronized boolean needsInput ()
  {
    return getRemaining () == 0;
  }

  public native void reset ();

  public void setDictionary (byte[] buf)
  {
    setDictionary (buf, 0, buf.length);
  }

  public native void setDictionary (byte[] buf, int off, int len);

  public void setInput (byte[] buf)
  {
    setInput (buf, 0, buf.length);
  }

  public native void setInput (byte[] buf, int off, int len);

  // The zlib stream.
  private RawData zstream;

  // True if finished.
  private boolean is_finished;

  // True if dictionary needed.
  private boolean dict_needed;
}