/*
   *==========================================================================
   *
   *      crc.h
   *
   *      Interface for the CRC algorithms.
   *
   *==========================================================================

   * SPDX-License-Identifier:	eCos-2.0

   *==========================================================================
   *#####DESCRIPTIONBEGIN####
   *
   * Author(s):    Andrew Lunn
   * Contributors: Andrew Lunn
   * Date:         2002-08-06
   * Purpose:
   * Description:
   *
   * This code is part of eCos (tm).
   *
   *####DESCRIPTIONEND####
   *
   *==========================================================================
   */

  
  #ifndef _SERVICES_CRC_CRC_H_
  #define _SERVICES_CRC_CRC_H_
  
  #include <linux/types.h>
  
  #ifndef __externC
  # ifdef __cplusplus
  #  define __externC extern "C"
  # else
  #  define __externC extern
  # endif
  #endif

  /* Compute a CRC, using the POSIX 1003 definition */
  extern uint32_t

  cyg_posix_crc32(unsigned char *s, int len);

  /* Gary S. Brown's 32 bit CRC */

  extern uint32_t

  cyg_crc32(unsigned char *s, int len);

  /* Gary S. Brown's 32 bit CRC, but accumulate the result from a */
  /* previous CRC calculation */

  extern uint32_t

  cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len);

  /* Ethernet FCS Algorithm */

  extern uint32_t

  cyg_ether_crc32(unsigned char *s, int len);

  /* Ethernet FCS algorithm, but accumulate the result from a previous */
  /* CRC calculation. */

  extern uint32_t

  cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);

  /* 16 bit CRC with polynomial x^16+x^12+x^5+1 */

  
  extern uint16_t cyg_crc16(unsigned char *s, int len);

  #endif /* _SERVICES_CRC_CRC_H_ */