crc.h

//==========================================================================
//
//      crc.h
//
//      Interface for the CRC algorithms.
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 2002, 2009 Free Software Foundation, Inc.                        
//
// 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     
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// version.                                                                 
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
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//
// As a special exception, if other files instantiate templates or use      
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// General Public License v2.                                               
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//==========================================================================
//#####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 <cyg/infra/cyg_type.h>
 
#ifndef __externC
# ifdef __cplusplus
#  define __externC extern "C"
# else
#  define __externC extern
# endif
#endif
 
// Compute a CRC, using the POSIX 1003 definition
 
__externC cyg_uint32 
cyg_posix_crc32(unsigned char *s, int len);
 
// Gary S. Brown's 32 bit CRC
 
__externC cyg_uint32 
cyg_crc32(unsigned char *s, int len);
 
// Gary S. Brown's 32 bit CRC, but accumulate the result from a
// previous CRC calculation
 
__externC cyg_uint32 
cyg_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
 
// Ethernet FCS Algorithm
 
__externC cyg_uint32 
cyg_ether_crc32(unsigned char *s, int len);
 
// Ethernet FCS algorithm, but accumulate the result from a previous
// CRC calculation.
 
__externC cyg_uint32 
cyg_ether_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
 
// 16 bit CRC with polynomial x^16+x^12+x^5+1
 
__externC cyg_uint16
cyg_crc16(unsigned char *s, int len);
 
__externC cyg_uint16
cyg_crc16_accumulate(cyg_uint16 crc, unsigned char *s, int len);
 
#endif // _SERVICES_CRC_CRC_H_