| 1 |
/* |
| 2 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 |
* |
| 4 |
* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 |
* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team |
| 6 |
* Copyright (©) 1992,2007 Frank Tore Johansen |
| 7 |
* |
| 8 |
* Deliantra 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 |
* |
| 13 |
* 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 |
* |
| 18 |
* 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 |
* |
| 21 |
* The authors can be reached via e-mail to <support@deliantra.net> |
| 22 |
*/ |
| 23 |
|
| 24 |
#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 |
