server/include/crc.h

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 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 Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

#ifndef CRC_H__
#define CRC_H__

#include "traits.h"

struct crc32
{
  uint32_t crc;

  crc32 ()
  {
    crc = ~uint32_t (0);
  }

  void
  operator ()(const uint8_t byte)
  {
    extern const uint32_t crc_32_tab[256];
    crc = crc_32_tab[uint8_t (crc) ^ byte] ^ (crc >> 8);
  }

  operator uint32_t () { return crc; }
};

#endif
Revision:	1.6
Committed:	Mon Oct 12 14:00:58 2009 UTC (14 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_82, rel-2_81
Changes since 1.5:	+7 -6 lines
Log Message:	clarify license
#	User	Rev	Content
1	root	1.2	/*
2	root	1.4	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	root	1.2	*
4	root	1.5	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.2	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7			*
8	root	1.6	* Deliantra is free software: you can redistribute it and/or modify it under
9			* the terms of the Affero GNU General Public License as published by the
10			* Free Software Foundation, either version 3 of the License, or (at your
11			* option) any later version.
12	root	1.2	*
13	root	1.3	* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17	root	1.2	*
18	root	1.6	* You should have received a copy of the Affero GNU General Public License
19			* and the GNU General Public License along with this program. If not, see
20			* <http://www.gnu.org/licenses/>.
21	root	1.2	*
22	root	1.4	* The authors can be reached via e-mail to <support@deliantra.net>
23	root	1.2	*/
24
25	root	1.1	#ifndef CRC_H__
26			#define CRC_H__
27
28			#include "traits.h"
29
30			struct crc32
31			{
32			uint32_t crc;
33
34			crc32 ()
35			{
36			crc = ~uint32_t (0);
37			}
38
39			void
40			operator ()(const uint8_t byte)
41			{
42			extern const uint32_t crc_32_tab[256];
43			crc = crc_32_tab[uint8_t (crc) ^ byte] ^ (crc >> 8);
44			}
45
46			operator uint32_t () { return crc; }
47			};
48
49			#endif