/*
************************************************************************
**
**	Copyright (c) 2013 by
**		Core|Vision B.V.
**		Cereslaan 10b
**		5384 VT  Heesch
**		The Netherlands
**
**	All Rights Reserved
**
************************************************************************
*/
/*
************************************************************************
**
**	Project name:   Dual Inventive: Utility Library
**	Filename:       cp3000-crc.h
**	Author:			Jack Weeland
**	Date:			February 26, 2013
**	File version:	$Revision: 1.2 $
**					$Date: 2013/04/15 15:37:42 $
**
************************************************************************
*/
/*
************************************************************************
**
**	CRC calculation
**
************************************************************************
*/

#ifndef	__CP3000_CRC_H
#define	__CP3000_CRC_

#include <stdint.h>

/*
**	Datatype
*/

typedef struct CP3000_CRC *cp3000_crc_t;

/*
**	Exported functions
*/

// initialisation and destruction
cp3000_crc_t cp3000_crc_init(int bits, uint32_t seed, uint32_t polynomal);
int cp3000_crc_deinit(cp3000_crc_t);

// reset the initial seed; only needed if the same 'cp3000_crc_t'
//	object is reused
int cp3000_crc_start(cp3000_crc_t);

// calculate CRC over an array of bytes; the intermediate result
//	will be saved, so this function can be called repeatedly over
//	chuncks of data to give a CRC over the complete data set
int cp3000_crc_add(cp3000_crc_t, const unsigned char*, size_t);

// get the (final) result
uint32_t cp3000_crc_result(cp3000_crc_t);

// Perform all three steps above
uint32_t cp3000_crc_calculate(cp3000_crc_t crc, const unsigned char*, size_t);

#endif	/* __CP3000_CRC_H */