server/include/crc.h

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 *
 * 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:	1.13
Committed:	Sat Nov 17 23:40:00 2018 UTC (5 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.12:	+1 -0 lines
Log Message:	copyright update 2018
#	User	Rev	Content
1	root	1.2	/*
2	root	1.4	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	root	1.11	*
4	root	1.13	* Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
5	root	1.12	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6	root	1.11	*
7	root	1.6	* Deliantra is free software: you can redistribute it and/or modify it under
8			* the terms of the Affero GNU General Public License as published by the
9			* Free Software Foundation, either version 3 of the License, or (at your
10			* option) any later version.
11	root	1.11	*
12	root	1.3	* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16	root	1.11	*
17	root	1.6	* You should have received a copy of the Affero GNU General Public License
18			* and the GNU General Public License along with this program. If not, see
19			* <http://www.gnu.org/licenses/>.
20	root	1.11	*
21	root	1.4	* The authors can be reached via e-mail to <support@deliantra.net>
22	root	1.2	*/
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