BN089-BS开发框架MVC4版/source20131023/Zephyr.Net/Zephyr.Utils/Compress/Ziplib/Checksums/StrangeCRC.cs

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// StrangeCRC.cs - computes a crc used in the bziplib
//
// 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 Zephyr.Utils.ZipLib.Checksums 
{
	/// <summary>
	/// Bzip2 checksum algorithm
	/// </summary>
	public class StrangeCRC : IChecksum
	{
		readonly static uint[] crc32Table = {
			0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
			0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
			0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
			0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
			0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
			0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
			0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
			0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
			0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
			0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
			0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
			0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,