ADBaseLibrary.Matroska.MatroskaExtensions.IdSize C# (CSharp) 메소드

        public static int IdSize(ulong id)
        {
            ulong mask = (id + 1) | 1;
            int index = 0;
            while (mask > 1)
            {
                mask >>= 1;
                index++;
            }
            return (index-1)/7 +1;
        }