Misc

void GUID::GenerateUnique()
{
    Time Time;
    GetTime(Time);

    static tU16 StaticMask = 0;
    StaticMask = InterlockedIncrement(StaticMask);

    A = GUUID;
    B = GMACAddress >> 16;
    C = (StaticMask << 16) | (GMACAddress & 0xffff);
    D = (Time.Second + Time.Minute * 60 + Time.Hour * 60 * 60) | (Time.Month << 17) | (Time.Day << 22) | ((Time.Year - 2011) << 27);

    // Simple encryption
    tU32 Mask = (StaticMask << 16) | ((StaticMask * 0x0bb38435) + 0x3619636b);
    A = ~A ^ Mask;
    B = ~B ^ Mask;
    C = ~C ^ StaticMask; // don't encrypt the mask itself
    D = ~D ^ Mask;
}

String GUID::GetDescStr() const
{
    tU16 StaticMask = ~(C >> 16);
    tU32 Mask = (StaticMask << 16) | (StaticMask * 0x0bb38435) + 0x3619636b;
    tU32 Mac0 = ~(B ^ Mask);
    tU32 Mac1 = ~(C ^ StaticMask);

    String Result = String::Printf(
        "UUID:%08x MAC:%02x-%02x-%02x-%02x-%02x-%02x ",
        ~(A ^ Mask),
        (tU32)((Mac0 & 0xff000000) >> 24),
        (tU32)((Mac0 & 0xff0000) >> 16),
        (tU32)((Mac0 & 0xff00) >> 8),
        (tU32)((Mac0 & 0xff)),
        (tU32)((Mac1 & 0xff00) >> 8),
        (tU32)((Mac1 & 0xff))
    );

    tU32 Timestamp = ~(D ^ Mask);
    tU32 Seconds = (Timestamp & 0x1ffff);
    tU32 Month = ((Timestamp >> 17) & 0x1f);
    tU32 Day = ((Timestamp >> 22) & 0x1f);
    tU32 Year = (Timestamp >> 27) + 2011;
    tU32 Hour = (Seconds / (60 * 60));
    Seconds -= Hour * 60 * 60;
    tU32 Minute = (Seconds / 60);
    Seconds -= Minute * 60;

    Result += String::Printf("Date:%d-%02d-%02d %d:%02d:%02d ", Year, Month, Day, Hour, Minute, Seconds);
    Result += String::Printf("Mask:0x%08x", Mask);

    return Result;
}