ADBaseLibrary.Matroska.MatroskaExtensions.Ebml_Read_Num C# (CSharp) Method

        public static int Ebml_Read_Num(this BinaryReader reader, int maxSize, out ulong number)
        {
            int n = 1;
            ulong total = reader.ReadByte();
            if (total==0)
                throw GenIo("Read error at pos {0} ({0:X})\n",reader);
            int read = 8 - FfLog2Tab[total];
            if (read > maxSize)
                throw GenIo("Invalid EBML number size tag 0x{1:X} at pos {0} ({0:X})\n", reader, total);
            total ^= (ulong)(1 << FfLog2Tab[total]);
            while (n++ < read)
            {
                byte b = reader.ReadByte();
                total = (total << 8) |  b;
            }
            number = total;
            return read;
        }