include/crc.h

   1 /*
   2  *==========================================================================
   3  *
   4  *      crc.h
   5  *
   6  *      Interface for the CRC algorithms.
   7  *
   8  *==========================================================================
   9  * SPDX-License-Identifier:     eCos-2.0
  10  *==========================================================================
  11  *#####DESCRIPTIONBEGIN####
  12  *
  13  * Author(s):    Andrew Lunn
  14  * Contributors: Andrew Lunn
  15  * Date:         2002-08-06
  16  * Purpose:
  17  * Description:
  18  *
  19  * This code is part of eCos (tm).
  20  *
  21  *####DESCRIPTIONEND####
  22  *
  23  *==========================================================================
  24  */
  25
  26 #ifndef _SERVICES_CRC_CRC_H_
  27 #define _SERVICES_CRC_CRC_H_
  28
  29 #include <linux/types.h>
  30
  31 #ifndef __externC
  32 # ifdef __cplusplus
  33 #  define __externC extern "C"
  34 # else
  35 #  define __externC extern
  36 # endif
  37 #endif
  38
  39 /* Compute a CRC, using the POSIX 1003 definition */
  40 extern uint32_t
  41 cyg_posix_crc32(unsigned char *s, int len);
  42
  43 /* Gary S. Brown's 32 bit CRC */
  44
  45 extern uint32_t
  46 cyg_crc32(unsigned char *s, int len);
  47
  48 /* Gary S. Brown's 32 bit CRC, but accumulate the result from a */
  49 /* previous CRC calculation */
  50
  51 extern uint32_t
  52 cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
  53
  54 /* Ethernet FCS Algorithm */
  55
  56 extern uint32_t
  57 cyg_ether_crc32(unsigned char *s, int len);
  58
  59 /* Ethernet FCS algorithm, but accumulate the result from a previous */
  60 /* CRC calculation. */
  61
  62 extern uint32_t
  63 cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
  64
  65 /* 16 bit CRC with polynomial x^16+x^12+x^5+1 */
  66
  67 extern uint16_t cyg_crc16(unsigned char *s, int len);
  68
  69 #endif /* _SERVICES_CRC_CRC_H_ */