iTextSharp.text.pdf.BarcodeCodabar.CalculateChecksum C# (CSharp) Метод

        public static String CalculateChecksum(String code) {
            if (code.Length < 2)
                return code;
            String text = code.ToUpper(System.Globalization.CultureInfo.InvariantCulture);
            int sum = 0;
            int len = text.Length;
            for (int k = 0; k < len; ++k)
                sum += CHARS.IndexOf(text[k]);
            sum = (sum + 15) / 16 * 16 - sum;
            return code.Substring(0, len - 1) + CHARS[sum] + code.Substring(len - 1);
        }