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1.1 root 1: /* crc16.h */
2:
3: /* CCITT 16-bit CRC table and calculation macro */
4:
1.1.1.2 ! root 5: /* $Id: crc16.h,v 1.5 2008/06/04 04:39:44 deuce Exp $ */
1.1 root 6:
7: /****************************************************************************
8: * @format.tab-size 4 (Plain Text/Source Code File Header) *
9: * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
10: * *
11: * Copyright 2003 Rob Swindell - http://www.synchro.net/copyright.html *
12: * *
13: * This program is free software; you can redistribute it and/or *
14: * modify it under the terms of the GNU General Public License *
15: * as published by the Free Software Foundation; either version 2 *
16: * of the License, or (at your option) any later version. *
17: * See the GNU General Public License for more details: gpl.txt or *
18: * http://www.fsf.org/copyleft/gpl.html *
19: * *
20: * Anonymous FTP access to the most recent released source is available at *
21: * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
22: * *
23: * Anonymous CVS access to the development source and modification history *
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27: * cvs -d :pserver:[email protected]:/cvsroot/sbbs checkout src *
28: * *
29: * For Synchronet coding style and modification guidelines, see *
30: * http://www.synchro.net/source.html *
31: * *
32: * You are encouraged to submit any modifications (preferably in Unix diff *
33: * format) via e-mail to [email protected] *
34: * *
35: * Note: If this box doesn't appear square, then you need to fix your tabs. *
36: ****************************************************************************/
37:
38: #ifndef _CRC16_H_
39: #define _CRC16_H_
40:
1.1.1.2 ! root 41: #include "gen_defs.h"
! 42:
1.1 root 43: #ifdef __cplusplus
44: extern "C" {
45: #endif
46:
1.1.1.2 ! root 47: extern uint16_t crc16tbl[];
1.1 root 48:
1.1.1.2 ! root 49: uint16_t crc16(const char* data, unsigned long len);
1.1 root 50:
51: #ifdef __cplusplus
52: }
53: #endif
54:
55: #define ucrc16(ch,crc) (crc16tbl[((crc>>8)&0xff)^(unsigned char)ch]^(crc << 8))
56:
57: #endif /* Don't add anything after this line */
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