/**
 * $Id: xcat.java 388 2010-03-08 12:27:19Z daldei $
 * $Date: 2010-03-08 07:27:19 -0500 (Mon, 08 Mar 2010) $
 *
 */

package org.xmlsh.internal.commands;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import java.util.zip.GZIPInputStream;
import org.xmlsh.core.InputPort;
import org.xmlsh.core.Options;
import org.xmlsh.core.XCommand;
import org.xmlsh.core.XValue;
import org.xmlsh.core.io.OutputPort;
import org.xmlsh.sh.shell.SerializeOpts;

public class xgunzip extends XCommand {

  @Override
  public int run(List<XValue> args) throws Exception {

    Options opts = new Options("f=file:,o=out:", SerializeOpts.getOptionDefs());
    opts.parse(args);

    XValue zipfile = opts.getOptValue("f");

    args = opts.getRemainingArgs();

    SerializeOpts serializeOpts = getSerializeOpts(opts);

    InputPort iport = (zipfile == null ? getStdin() : getInput(zipfile));
    InputStream is = iport.asInputStream(serializeOpts);

    GZIPInputStream zis = new GZIPInputStream(is);

    XValue xout = opts.getOptValue("out");

    OutputPort oport = this.getOutput(xout, false);

    try {

      int ret = 0;
      ret = gunzip(zis, oport.asOutputStream(serializeOpts), args);

      zis.close();

      return ret;

    } finally {
      zis.close();
      is.close();
    }

  }

  private int gunzip(GZIPInputStream zis, OutputStream out, List<XValue> args)
      throws IOException {

    byte[] buf = new byte[1024];
    int len;
    while((len = zis.read(buf)) > 0)
      out.write(buf, 0, len);

    zis.close();
    out.close();

    return 0;
  }

}

//
//
// Copyright (C) 2008-2014 David A. Lee.
//
// The contents of this file are subject to the "Simplified BSD License" (the
// "License");
// you may not use this file except in compliance with the License. You may
// obtain a copy of the
// License at http://www.opensource.org/licenses/bsd-license.php
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is David A. Lee
//
// Portions created by (your name) are Copyright (C) (your legal entity). All
// Rights Reserved.
//
// Contributor(s): none.
//