iTextSharp.text.pdf.CFFFontSubset.CountCharset C# (CSharp) Метод

        internal int CountCharset(int Offset,int NumofGlyphs)
        {
            int format;
            int Length=0;
            Seek(Offset);
            // Read the format
            format = GetCard8();
            // Calc according to format
            switch (format){
                case 0:
                    Length = 1+2*NumofGlyphs;
                    break;
                case 1:
                    Length = 1+3*CountRange(NumofGlyphs,1);
                    break;
                case 2:
                    Length = 1+4*CountRange(NumofGlyphs,2);
                    break;
                default:
                    break;
            }
            return Length;
        }