1 //==========================================================================
5 // Interface for the CRC algorithms.
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 2002 Andrew Lunn
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.
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
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.
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.
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.
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####
43 // Author(s): Andrew Lunn
44 // Contributors: Andrew Lunn
49 // This code is part of eCos (tm).
51 //####DESCRIPTIONEND####
53 //==========================================================================
55 #ifndef _SERVICES_CRC_CRC_H_
56 #define _SERVICES_CRC_CRC_H_
59 #include <cyg/infra/cyg_type.h>
62 typedef uint32_t cyg_uint32
;
63 typedef uint16_t cyg_uint16
;
68 # define __externC extern "C"
70 # define __externC extern
74 // Compute a CRC, using the POSIX 1003 definition
77 cyg_posix_crc32(unsigned char *s
, int len
);
79 // Gary S. Brown's 32 bit CRC
82 cyg_crc32(unsigned char *s
, int len
);
84 // Gary S. Brown's 32 bit CRC, but accumulate the result from a
85 // previous CRC calculation
88 cyg_crc32_accumulate(cyg_uint32 crc
, unsigned char *s
, int len
);
90 // Ethernet FCS Algorithm
93 cyg_ether_crc32(unsigned char *s
, int len
);
95 // Ethernet FCS algorithm, but accumulate the result from a previous
99 cyg_ether_crc32_accumulate(cyg_uint32 crc
, unsigned char *s
, int len
);
101 // 16 bit CRC with polynomial x^16+x^12+x^5+1
104 cyg_crc16(unsigned char *s
, int len
);
106 #endif // _SERVICES_CRC_CRC_H_
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