iTextSharp.text.pdf.Barcode128.GetRawText C# (CSharp) Method

        public static string GetRawText(string text, bool ucc) {
            String outs = "";
            int tLen = text.Length;
            if (tLen == 0) {
                outs += START_B;
                if (ucc)
                    outs += FNC1_INDEX;
                return outs;
            }
            int c = 0;
            for (int k = 0; k < tLen; ++k) {
                c = text[k];
                if (c > 127 && c != FNC1)
                    throw new ArgumentException("There are illegal characters for barcode 128 in '" + text + "'.");
            }
            c = text[0];
            char currentCode = START_B;
            int index = 0;
            if (IsNextDigits(text, index, 2)) {
                currentCode = START_C;
                outs += currentCode;
                if (ucc)
                    outs += FNC1_INDEX;
                String out2 = GetPackedRawDigits(text, index, 2);
                index += (int)out2[0];
                outs += out2.Substring(1);
            }
            else if (c < ' ') {
                currentCode = START_A;
                outs += currentCode;
                if (ucc)
                    outs += FNC1_INDEX;
                outs += (char)(c + 64);
                ++index;
            }
            else {
                outs += currentCode;
                if (ucc)
                    outs += FNC1_INDEX;
                if (c == FNC1)
                    outs += FNC1_INDEX;
                else
                    outs += (char)(c - ' ');
                ++index;
            }
            while (index < tLen) {
                switch (currentCode) {
                    case START_A:
                        {
                            if (IsNextDigits(text, index, 4)) {
                                currentCode = START_C;
                                outs += CODE_AB_TO_C;
                                String out2 = GetPackedRawDigits(text, index, 4);
                                index += (int)out2[0];
                                outs += out2.Substring(1);
                            }
                            else {
                                c = text[index++];
                                if (c == FNC1)
                                    outs += FNC1_INDEX;
                                else if (c > '_') {
                                    currentCode = START_B;
                                    outs += CODE_AC_TO_B;
                                    outs += (char)(c - ' ');
                                }
                                else if (c < ' ')
                                    outs += (char)(c + 64);
                                else
                                    outs += (char)(c - ' ');
                            }
                        }
                        break;
                    case START_B:
                        {
                            if (IsNextDigits(text, index, 4)) {
                                currentCode = START_C;
                                outs += CODE_AB_TO_C;
                                String out2 = GetPackedRawDigits(text, index, 4);
                                index += (int)out2[0];
                                outs += out2.Substring(1);
                            }
                            else {
                                c = text[index++];
                                if (c == FNC1)
                                    outs += FNC1_INDEX;
                                else if (c < ' ') {
                                    currentCode = START_A;
                                    outs += CODE_BC_TO_A;
                                    outs += (char)(c + 64);
                                }
                                else {
                                    outs += (char)(c - ' ');
                                }
                            }
                        }
                        break;
                    case START_C:
                        {
                            if (IsNextDigits(text, index, 2)) {
                                String out2 = GetPackedRawDigits(text, index, 2);
                                index += (int)out2[0];
                                outs += out2.Substring(1);
                            }
                            else {
                                c = text[index++];
                                if (c == FNC1)
                                    outs += FNC1_INDEX;
                                else if (c < ' ') {
                                    currentCode = START_A;
                                    outs += CODE_BC_TO_A;
                                    outs += (char)(c + 64);
                                }
                                else {
                                    currentCode = START_B;
                                    outs += CODE_AC_TO_B;
                                    outs += (char)(c - ' ');
                                }
                            }
                        }
                        break;
                }
            }
            return outs;
        }