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 <linux/types.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 extern uint32_t 70 cyg_posix_crc32(unsigned char *s, int len); 71 72 // Gary S. Brown's 32 bit CRC 73 74 extern uint32_t 75 cyg_crc32(unsigned char *s, int len); 76 77 // Gary S. Brown's 32 bit CRC, but accumulate the result from a 78 // previous CRC calculation 79 80 extern uint32_t 81 cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len); 82 83 // Ethernet FCS Algorithm 84 85 extern uint32_t 86 cyg_ether_crc32(unsigned char *s, int len); 87 88 // Ethernet FCS algorithm, but accumulate the result from a previous 89 // CRC calculation. 90 91 extern uint32_t 92 cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len); 93 94 // 16 bit CRC with polynomial x^16+x^12+x^5+1 95 96 extern uint16_t cyg_crc16(unsigned char *s, int len); 97 98 #endif // _SERVICES_CRC_CRC_H_ 99 100 101 102