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// BZip2.cs

//

// Copyright (C) 2001 Mike Krueger

//

// This program 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

// of the License, or (at your option) any later version.

//

// This program 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 this program; 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.

using System;

using System.IO;

namespace ICSharpCode.SharpZipLib.Silverlight.BZip2

{

    /// <summary>

    /// A helper class to simplify compressing and decompressing streams.

    /// </summary>

    public static class BZip2

    {

        /// <summary>

        /// Decompress <paramref name="inStream">input</paramref> writing 

        /// decompressed data to the <paramref name="outStream">output stream</paramref>

        /// </summary>

        /// <param name="inStream">The stream containing data to decompress.</param>

        /// <param name="outStream">The stream to write decompressed data to.</param>

        /// <remarks>Both streams are closed on completion</remarks>

        public static void Decompress(Stream inStream, Stream outStream) 

        {

            if ( inStream == null ) {

                throw new ArgumentNullException("inStream");

            }

            if ( outStream == null ) {

                throw new ArgumentNullException("outStream");

            }

            using ( outStream ) {

                using ( var bzis = new BZip2InputStream(inStream) ) {

                    var ch = bzis.ReadByte();

                    while (ch != -1) {

                        outStream.WriteByte((byte)ch);

                        ch = bzis.ReadByte();

                    }

                }

            }

        }

        /// <summary>

        /// Compress <paramref name="inStream">input stream</paramref> sending 

        /// result to <paramref name="outStream">output stream</paramref>

        /// </summary>

        /// <param name="inStream">The stream to compress.</param>

        /// <param name="outStream">The stream to write compressed data to.</param>

        /// <param name="blockSize">The block size to use.</param>

        /// <remarks>Both streams are closed on completion</remarks>

        public static void Compress(Stream inStream, Stream outStream, int blockSize) 

        {			

            if ( inStream == null ) {

                throw new ArgumentNullException("inStream");

            }

            if ( outStream == null ) {

                throw new ArgumentNullException("outStream");

            }

            using ( inStream ) {

                using (var bzos = new BZip2OutputStream(outStream, blockSize)) {

                    var ch = inStream.ReadByte();

                    while (ch != -1) {

                        bzos.WriteByte((byte)ch);

                        ch = inStream.ReadByte();

                    }

                }

            }

        }

    }

}

/* derived from a file which contained this license :

 * Copyright (c) 1999-2001 Keiron Liddle, Aftex Software

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

*/