server/include/crc.h

/*
 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
 * 
 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Crossfire TRT 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 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 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 <crossfire@schmorp.de>
 */

#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:	1.3
Committed:	Sun Jul 1 05:00:18 2007 UTC (19 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_2, rel-2_3
Changes since 1.2:	+11 -12 lines
Log Message:	- upgrade crossfire trt to the GPL version 3 (hopefully correctly). - add a single file covered by the GNU Affero General Public License (which is not yet released, so I used the current draft, which is legally a bit wavy, but its likely better than nothing as it expresses direct intent by the authors, and we can upgrade as soon as it has been released). * this should ensure availability of source code for the server at least and hopefully also archetypes and maps even when modified versions are not being distributed, in accordance of section 13 of the agplv3.
#	User	Rev	Content
1	root	1.2	/*
2	root	1.3	* This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3	root	1.2	*
4			* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
5			* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7			*
8	root	1.3	* Crossfire TRT is free software: you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation, either version 3 of the License, or
11			* (at your 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	1.3	* You should have received a copy of the GNU General Public License
19			* along with this program. If not, see <http://www.gnu.org/licenses/>.
20	root	1.2	*
21			* The authors can be reached via e-mail to <crossfire@schmorp.de>
22			*/
23
24	root	1.1	#ifndef CRC_H__
25			#define CRC_H__
26
27			#include "traits.h"
28
29			struct crc32
30			{
31			uint32_t crc;
32
33			crc32 ()
34			{
35			crc = ~uint32_t (0);
36			}
37
38			void
39			operator ()(const uint8_t byte)
40			{
41			extern const uint32_t crc_32_tab[256];
42			crc = crc_32_tab[uint8_t (crc) ^ byte] ^ (crc >> 8);
43			}
44
45			operator uint32_t () { return crc; }
46			};
47
48			#endif