path: root/include/crc.h (plain)
blob: 5085d4ed477919c0f01390742c7b5b23892e9894

1	/*
2	*==========================================================================
3	*
4	* crc.h
5	*
6	* Interface for the CRC algorithms.
7	*
8	*==========================================================================
9	* SPDX-License-Identifier: eCos-2.0
10	*==========================================================================
11	*#####DESCRIPTIONBEGIN####
12	*
13	* Author(s): Andrew Lunn
14	* Contributors: Andrew Lunn
15	* Date: 2002-08-06
16	* Purpose:
17	* Description:
18	*
19	* This code is part of eCos (tm).
20	*
21	*####DESCRIPTIONEND####
22	*
23	*==========================================================================
24	*/
25
26	#ifndef _SERVICES_CRC_CRC_H_
27	#define _SERVICES_CRC_CRC_H_
28
29	#include <linux/types.h>
30
31	#ifndef __externC
32	# ifdef __cplusplus
33	# define __externC extern "C"
34	# else
35	# define __externC extern
36	# endif
37	#endif
38
39	/* Compute a CRC, using the POSIX 1003 definition */
40	extern uint32_t
41	cyg_posix_crc32(unsigned char *s, int len);
42
43	/* Gary S. Brown's 32 bit CRC */
44
45	extern uint32_t
46	cyg_crc32(unsigned char *s, int len);
47
48	/* Gary S. Brown's 32 bit CRC, but accumulate the result from a */
49	/* previous CRC calculation */
50
51	extern uint32_t
52	cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
53
54	/* Ethernet FCS Algorithm */
55
56	extern uint32_t
57	cyg_ether_crc32(unsigned char *s, int len);
58
59	/* Ethernet FCS algorithm, but accumulate the result from a previous */
60	/* CRC calculation. */
61
62	extern uint32_t
63	cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
64
65	/* 16 bit CRC with polynomial x^16+x^12+x^5+1 */
66
67	extern uint16_t cyg_crc16(unsigned char *s, int len);
68
69	#endif /* _SERVICES_CRC_CRC_H_ */
70