void Checksum::addLoopSwapping ( const uint16_t *  sbuf, const uint16_t *  end, uint32_t *  hilo  )

inline

Definition at line 101 of file checksum.h.

Referenced by add().

    {
        /*
        for (size_t i = 0; i < len/2; i++)
        {
            //swap the bytes of the 32 bits value. but...
            //the hi and lo values are stored in fits-like order. do not swap them
            hilo[i%2] += ntohs(sbuf[i]); //(sbuf[i]&0xff00)>>8 | (sbuf[i]&0x00ff)<<8;
        }*/

        // This is about as twice as fast as the loop above
        // ntohs is CPU optimized, i%2 doesn't need to be computed
        while (1)
        {
            if (sbuf==end)
                break;

            hilo[0] += ntohs(*sbuf++);

            if (sbuf==end)
                break;

            hilo[1] += ntohs(*sbuf++);
        }
    }

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