1 /* 2 *========================================================================== 3 * 4 * crc.h 5 * 6 * Interface for the CRC algorithms. 7 * 8 *========================================================================== 9 *####ECOSGPLCOPYRIGHTBEGIN#### 10 * ------------------------------------------- 11 * This file is part of eCos, the Embedded Configurable Operating System. 12 * Copyright (C) 2002 Andrew Lunn 13 * 14 * eCos is free software; you can redistribute it and/or modify it under 15 * the terms of the GNU General Public License as published by the Free 16 * Software Foundation; either version 2 or (at your option) any later version. 17 * 18 * eCos is distributed in the hope that it will be useful, but WITHOUT ANY 19 * WARRANTY; without even the implied warranty of MERCHANTABILITY or 20 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 21 * for more details. 22 * 23 * You should have received a copy of the GNU General Public License along 24 * with eCos; if not, write to the Free Software Foundation, Inc., 25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 26 * 27 * As a special exception, if other files instantiate templates or use macros 28 * or inline functions from this file, or you compile this file and link it 29 * with other works to produce a work based on this file, this file does not 30 * by itself cause the resulting work to be covered by the GNU General Public 31 * License. However the source code for this file must still be made available 32 * in accordance with section (3) of the GNU General Public License. 33 * 34 * This exception does not invalidate any other reasons why a work based on 35 * this file might be covered by the GNU General Public License. 36 * 37 * Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. 38 * at http: *sources.redhat.com/ecos/ecos-license/ 39 * ------------------------------------------- 40 *####ECOSGPLCOPYRIGHTEND#### 41 *========================================================================== 42 *#####DESCRIPTIONBEGIN#### 43 * 44 * Author(s): Andrew Lunn 45 * Contributors: Andrew Lunn 46 * Date: 2002-08-06 47 * Purpose: 48 * Description: 49 * 50 * This code is part of eCos (tm). 51 * 52 *####DESCRIPTIONEND#### 53 * 54 *========================================================================== 55 */ 56 57 #ifndef _SERVICES_CRC_CRC_H_ 58 #define _SERVICES_CRC_CRC_H_ 59 60 #include <linux/types.h> 61 62 #ifndef __externC 63 # ifdef __cplusplus 64 # define __externC extern "C" 65 # else 66 # define __externC extern 67 # endif 68 #endif 69 70 /* Compute a CRC, using the POSIX 1003 definition */ 71 extern uint32_t 72 cyg_posix_crc32(unsigned char *s, int len); 73 74 /* Gary S. Brown's 32 bit CRC */ 75 76 extern uint32_t 77 cyg_crc32(unsigned char *s, int len); 78 79 /* Gary S. Brown's 32 bit CRC, but accumulate the result from a */ 80 /* previous CRC calculation */ 81 82 extern uint32_t 83 cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len); 84 85 /* Ethernet FCS Algorithm */ 86 87 extern uint32_t 88 cyg_ether_crc32(unsigned char *s, int len); 89 90 /* Ethernet FCS algorithm, but accumulate the result from a previous */ 91 /* CRC calculation. */ 92 93 extern uint32_t 94 cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len); 95 96 /* 16 bit CRC with polynomial x^16+x^12+x^5+1 */ 97 98 extern uint16_t cyg_crc16(unsigned char *s, int len); 99 100 #endif /* _SERVICES_CRC_CRC_H_ */ 101