LibCrc16.hpp

//------------------------------------------------------------------------------
//This file is part of embKernel. 
//See license.txt for the full license governing this code.
//------------------------------------------------------------------------------

#ifndef LIBCRC16_HPP_
#define LIBCRC16_HPP_

#include <stdint.h>
#include <stddef.h>

class LibCrc16 {
private:
    const static uint8_t CRC_LOOKUP_HI[];
    const static uint8_t CRC_LOOKUP_LO[];

public:
    static inline void update(uint8_t value, uint8_t* crcHi, uint8_t* crcLo) {
        unsigned int idx = *crcLo ^ value; // calculate the CRC
        *crcLo = *crcHi ^ CRC_LOOKUP_HI[idx];
        *crcHi = CRC_LOOKUP_LO[idx];
    }

    static void compute(const uint8_t* src, size_t len, uint8_t* crcHi, uint8_t* crcLo);

    static uint16_t compute(const uint8_t* src, size_t len);
};

#endif /* LIBCRC16_HPP_ */