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

        protected void ReadCommand()
        {
            key = null;
            bool gotKey = false;
            // Until a key is found
            while (!gotKey) {
                // Read the first Char
                char b0 = GetCard8();
                // decode according to the type1/type2 format
                if (b0 == 28) // the two next bytes represent a short int;
                {
                    int first = GetCard8();
                    int second = GetCard8();
                    args[arg_count] = first<<8 | second;
                    arg_count++;
                    continue;
                }
                if (b0 >= 32 && b0 <= 246) // The byte read is the byte;
                {
                    args[arg_count] = (int)b0 - 139;
                    arg_count++;
                    continue;
                }
                if (b0 >= 247 && b0 <= 250) // The byte read and the next byte constetute a short int
                {
                    int w = GetCard8();
                    args[arg_count] = ((int)b0-247)*256 + w + 108;
                    arg_count++;
                    continue;
                }
                if (b0 >= 251 && b0 <= 254)// Same as above except negative
                {
                    int w = GetCard8();
                    args[arg_count] = -((int)b0-251)*256 - w - 108;
                    arg_count++;
                    continue;
                }
                if (b0 == 255)// The next for bytes represent a double.
                {
                    int first = GetCard8();
                    int second = GetCard8();
                    int third = GetCard8();
                    int fourth = GetCard8();
                    args[arg_count] = first<<24 | second<<16 | third<<8 | fourth;
                    arg_count++;
                    continue;
                }
                if (b0<=31 && b0 != 28) // An operator was found.. Set Key.
                {
                    gotKey=true;
                    // 12 is an escape command therefor the next byte is a part
                    // of this command
                    if (b0 == 12)
                    {
                        int b1 = GetCard8();
                        if (b1>SubrsEscapeFuncs.Length-1)
                            b1 = SubrsEscapeFuncs.Length-1;
                        key = SubrsEscapeFuncs[b1];
                    }
                    else
                        key = SubrsFunctions[b0];
                    continue;
                }
            }
        }