source: SVN/cambria/redboot/packages/services/crc/current/include/crc.h @ 1

Last change on this file since 1 was 1, checked in by Tim Harvey, 2 years ago

restored latest version of files from server backup

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1//==========================================================================
2//
3//      crc.h
4//
5//      Interface for the CRC algorithms.
6//
7//==========================================================================
8//####ECOSGPLCOPYRIGHTBEGIN####
9// -------------------------------------------
10// This file is part of eCos, the Embedded Configurable Operating System.
11// Copyright (C) 2002 Andrew Lunn
12//
13// eCos is free software; you can redistribute it and/or modify it under
14// the terms of the GNU General Public License as published by the Free
15// Software Foundation; either version 2 or (at your option) any later version.
16//
17// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18// WARRANTY; without even the implied warranty of MERCHANTABILITY or
19// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20// for more details.
21//
22// You should have received a copy of the GNU General Public License along
23// with eCos; if not, write to the Free Software Foundation, Inc.,
24// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25//
26// As a special exception, if other files instantiate templates or use macros
27// or inline functions from this file, or you compile this file and link it
28// with other works to produce a work based on this file, this file does not
29// by itself cause the resulting work to be covered by the GNU General Public
30// License. However the source code for this file must still be made available
31// in accordance with section (3) of the GNU General Public License.
32//
33// This exception does not invalidate any other reasons why a work based on
34// this file might be covered by the GNU General Public License.
35//
36// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37// at http://sources.redhat.com/ecos/ecos-license/
38// -------------------------------------------
39//####ECOSGPLCOPYRIGHTEND####
40//==========================================================================
41//#####DESCRIPTIONBEGIN####
42//
43// Author(s):    Andrew Lunn
44// Contributors: Andrew Lunn
45// Date:         2002-08-06
46// Purpose:     
47// Description: 
48//             
49// This code is part of eCos (tm).
50//
51//####DESCRIPTIONEND####
52//
53//==========================================================================
54
55#ifndef _SERVICES_CRC_CRC_H_
56#define _SERVICES_CRC_CRC_H_
57
58#include <cyg/infra/cyg_type.h>
59
60#ifndef __externC
61# ifdef __cplusplus
62#  define __externC extern "C"
63# else
64#  define __externC extern
65# endif
66#endif
67
68// Compute a CRC, using the POSIX 1003 definition
69
70__externC cyg_uint32
71cyg_posix_crc32(unsigned char *s, int len);
72
73// Gary S. Brown's 32 bit CRC
74
75__externC cyg_uint32
76cyg_crc32(unsigned char *s, int len);
77
78// Gary S. Brown's 32 bit CRC, but accumulate the result from a
79// previous CRC calculation
80
81__externC cyg_uint32
82cyg_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
83
84// Ethernet FCS Algorithm
85
86__externC cyg_uint32
87cyg_ether_crc32(unsigned char *s, int len);
88
89// Ethernet FCS algorithm, but accumulate the result from a previous
90// CRC calculation.
91
92__externC cyg_uint32
93cyg_ether_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
94
95// 16 bit CRC with polynomial x^16+x^12+x^5+1
96
97__externC cyg_uint16
98cyg_crc16(unsigned char *s, int len);
99
100#endif // _SERVICES_CRC_CRC_H_
101
102
103
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