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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2014 Dominik Reichl <dominik.reichl@t-online.de>
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.GZip;
namespace KeePassLibSD
{
public enum CompressionMode
{
Compress = 0,
Decompress
}
public sealed class GZipStream : Stream
{
private Stream m_gzStream = null;
private CompressionMode m_cprMode;
public GZipStream(Stream sBase, CompressionMode cm)
{
if(cm == CompressionMode.Compress)
m_gzStream = new GZipOutputStream(sBase);
else
m_gzStream = new GZipInputStream(sBase);
m_cprMode = cm;
}
public override bool CanRead
{
get { return m_gzStream.CanRead; }
}
public override bool CanSeek
{
get { return m_gzStream.CanSeek; }
}
public override bool CanWrite
{
get { return m_gzStream.CanWrite; }
}
public override long Length
{
get { return m_gzStream.Length; }
}
public override long Position
{
get
{
return m_gzStream.Position;
}
set
{
m_gzStream.Position = value;
}
}
public override void Flush()
{
m_gzStream.Flush();
}
public override void Close()
{
if(m_gzStream == null) return;
if(m_cprMode == CompressionMode.Compress)
{
m_gzStream.Flush();
((GZipOutputStream)m_gzStream).Finish();
}
m_gzStream.Close();
m_gzStream = null;
}
public override long Seek(long offset, SeekOrigin origin)
{
return m_gzStream.Seek(offset, origin);
}
public override void SetLength(long value)
{
m_gzStream.SetLength(value);
}
public override int Read(byte[] buffer, int offset, int count)
{
return m_gzStream.Read(buffer, offset, count);
}
public override void Write(byte[] buffer, int offset, int count)
{
m_gzStream.Write(buffer, offset, count);
}
}
}
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