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

        internal static String GetPackedRawDigits(String text, int textIndex, int numDigits) {
            String outs = "";
            int start = textIndex;
            while (numDigits > 0) {
                if (text[textIndex] == FNC1) {
                    outs += FNC1_INDEX;
                    ++textIndex;
                    continue;
                }
                numDigits -= 2;
                int c1 = text[textIndex++] - '0';
                int c2 = text[textIndex++] - '0';
                outs += (char)(c1 * 10 + c2);
            }
            return (char)(textIndex - start) + outs;
        }