CASCExplorer.OwRootHandler.keyToTypeID C# (CSharp) Method

        static ulong keyToTypeID(ulong key)
        {
            var num = (key >> 48);
            num = (((num >> 1) & 0x55555555) | ((num & 0x55555555) << 1));
            num = (((num >> 2) & 0x33333333) | ((num & 0x33333333) << 2));
            num = (((num >> 4) & 0x0F0F0F0F) | ((num & 0x0F0F0F0F) << 4));
            num = (((num >> 8) & 0x00FF00FF) | ((num & 0x00FF00FF) << 8));
            num = ((num >> 16) | (num << 16));
            num >>= 20;
            return num + 1;
        }