System.DateTimeParse.GetDayOfNNN C# (CSharp) Méthode

        private static Boolean GetDayOfNNN(ref DateTimeResult result, ref DateTimeRawInfo raw, DateTimeFormatInfo dtfi)
        {
            if ((result.flags & ParseFlags.HaveDate) != 0) {
                // Multiple dates in the input string
                result.SetFailure(ParseFailureKind.Format, "Format_BadDateTime", null);
                return false;
            }

            int n1 = raw.GetNumber(0);
            int n2 = raw.GetNumber(1);;
            int n3 = raw.GetNumber(2);

            int order;
            if (!GetYearMonthDayOrder(dtfi.ShortDatePattern, dtfi, out order)) {
                result.SetFailure(ParseFailureKind.FormatWithParameter, "Format_BadDatePattern", dtfi.ShortDatePattern);
                return false;
            }

            if (order == ORDER_YMD) {
                if (SetDateYMD(ref result, AdjustYear(ref result, n1), n2, n3))         // YMD
                {
                    result.flags |= ParseFlags.HaveDate;
                    return true;
                }
            } else if (order == ORDER_MDY) {
                if (SetDateMDY(ref result, n1, n2, AdjustYear(ref result, n3)))         // MDY
                {
                    result.flags |= ParseFlags.HaveDate;
                    return true;
                }
            } else if (order == ORDER_DMY) {
                if (SetDateDMY(ref result, n1, n2, AdjustYear(ref result, n3)))         // DMY
                {
                    result.flags |= ParseFlags.HaveDate;
                    return true;
                }
            } else if (order == ORDER_YDM) {
                if (SetDateYDM(ref result, AdjustYear(ref result, n1), n2, n3))         // YDM
                {
                    result.flags |= ParseFlags.HaveDate;
                    return true;
                }
            }
            result.SetFailure(ParseFailureKind.Format, "Format_BadDateTime", null);
            return false;
        }