include/crc.h

   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_ */