iTextSharp.text.pdf.ArabicLigaturizer.ShapeToArabicDigitsWithContext C# (CSharp) Метод

        internal static void ShapeToArabicDigitsWithContext(char[] dest, int start, int length, char digitBase,  bool lastStrongWasAL)
        {
            digitBase -= '0'; // move common adjustment out of loop

            int limit = start + length;
            for (int i = start; i < limit; ++i) {
                char ch = dest[i];
                switch (BidiOrder.GetDirection(ch)) {
                case BidiOrder.L:
                case BidiOrder.R:
                    lastStrongWasAL = false;
                    break;
                case BidiOrder.AL:
                    lastStrongWasAL = true;
                    break;
                case BidiOrder.EN:
                    if (lastStrongWasAL && ch <= '\u0039') {
                        dest[i] = (char)(ch + digitBase);
                    }
                    break;
                default:
                    break;
                }
            }
        }