crc.h

u-boot-1.1.6 源码包

/*
 *==========================================================================
 *
 *      crc.h
 *
 *      Interface for the CRC algorithms.
 *
 *==========================================================================
 *####ECOSGPLCOPYRIGHTBEGIN####
 * -------------------------------------------
 * This file is part of eCos, the Embedded Configurable Operating System.
 * Copyright (C) 2002 Andrew Lunn
 *
 * eCos is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 or (at your option) any later version.
 *
 * eCos is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with eCos; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * As a special exception, if other files instantiate templates or use macros
 * or inline functions from this file, or you compile this file and link it
 * with other works to produce a work based on this file, this file does not
 * by itself cause the resulting work to be covered by the GNU General Public
 * License. However the source code for this file must still be made available
 * in accordance with section (3) of the GNU General Public License.
 *
 * This exception does not invalidate any other reasons why a work based on
 * this file might be covered by the GNU General Public License.
 *
 * Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
 * at http: *sources.redhat.com/ecos/ecos-license/
 * -------------------------------------------
 *####ECOSGPLCOPYRIGHTEND####
 *==========================================================================
 *#####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_ */