E3.CSharpZipLib/Zip/Compression/Streams/StreamManipulator.cs

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// StreamManipulator.cs
//
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// 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;

namespace E3.CSharpZipLib.Zip.Compression.Streams 
{
	
	/// <summary>
	/// This class allows us to retrieve a specified number of bits from
	/// the input buffer, as well as copy big byte blocks.
	///
	/// It uses an int buffer to store up to 31 bits for direct
	/// manipulation.  This guarantees that we can get at least 16 bits,
	/// but we only need at most 15, so this is all safe.
	///
	/// There are some optimizations in this class, for example, you must
	/// never peek more than 8 bits more than needed, and you must first
	/// peek bits before you may drop them.  This is not a general purpose
	/// class but optimized for the behaviour of the Inflater.
	///
	/// authors of the original java version : John Leuner, Jochen Hoenicke
	/// </summary>
	public class StreamManipulator
	{