gistfile1.d

public T[] generate_crc_table3(T)(T polynomial, T initialValue, bool refin) {
    T[] table = new T[](256);
    int i, j;
    T bit, crc;
    auto order = T.sizeof * 8;

    for(i = 0; i < 256; i++) {

        crc = cast(T)i;
        if(refin) {
            crc=reflect(crc, 8);
        }
        crc <<= order-8;

        for(j = 0; j < 8; j++) {

            bit = crc & crchighbit;
            crc<<= 1;
            if (bit) crc^= polynom;
        }           

        if (refin) {
            crc = reflect(crc, order);
        }

        table[i]= crc;
    }
}