Function fletcher16

plugins/remotefortressreader/remotefortressreader.cpp:307–324

}

uint16_t fletcher16(uint8_t const *data, size_t bytes)
{
    uint16_t sum1 = 0xff, 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;
}

void ConvertDfColor(int16_t index, RemoteFortressReader::ColorDefinition * out)
{