System.Text.GB18030Encoding.Is4Byte C# (CSharp) Метод

        internal unsafe bool Is4Byte(char charTest)
        {
            // See what kind it is
            byte b4Byte = mapUnicodeTo4BytesFlags[charTest / 8];
            return (b4Byte != 0 && (b4Byte & (1 << (charTest % 8))) != 0);
        }