template<typename T >

uint16_t Tools::Fletcher16	(	const T *	t,
		size_t	cnt
	)

Definition at line 22 of file tools.h.

References data, and t.

Referenced by ConnectionFSC::CheckChecksum(), and ConnectionPFmini::HandleReceivedData().

    {
        const uint8_t *data = reinterpret_cast<const uint8_t*>(t);

        size_t bytes = cnt*sizeof(T);

        uint16_t sum1 = 0xff;
        uint16_t sum2 = 0xff;

        while (bytes) 
        {
            size_t tlen = bytes > 20 ? 20 : bytes;
            bytes -= tlen;

            do {
                sum2 += sum1 += *data++;
            } while (--tlen);

            sum1 = (sum1 & 0xff) + (sum1 >> 8);
            sum2 = (sum2 & 0xff) + (sum2 >> 8);
        }

        // Second reduction step to reduce sums to 8 bits
        sum1 = (sum1 & 0xff) + (sum1 >> 8);
        sum2 = (sum2 & 0xff) + (sum2 >> 8);

        return sum2 << 8 | sum1;
    }

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