E3.CSharpZipLib/Checksums/Adler32.cs

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// Adler32.cs - Computes Adler32 data checksum of a data stream
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 1999, 2000, 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.Checksums 
{
	
	/// <summary>
	/// Computes Adler32 checksum for a stream of data. An Adler32
	/// checksum is not as reliable as a CRC32 checksum, but a lot faster to
	/// compute.
	/// 
	/// The specification for Adler32 may be found in RFC 1950.
	/// ZLIB Compressed Data Format Specification version 3.3)
	/// 
	/// 
	/// From that document:
	/// 
	///      "ADLER32 (Adler-32 checksum)
	///       This contains a checksum value of the uncompressed data
	///       (excluding any dictionary data) computed according to Adler-32
	///       algorithm. This algorithm is a 32-bit extension and improvement
	///       of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073
	///       standard.
	///