System.DateTimeParse.MatchAbbreviatedMonthName C# (CSharp) Méthode

        private static bool MatchAbbreviatedMonthName(ref __DTString str, DateTimeFormatInfo dtfi, ref int result) {
            int maxMatchStrLen = 0;
            result = -1;
            if (str.GetNext()) {
                //
                // Scan the month names (note that some calendars has 13 months) and find
                // the matching month name which has the max string length.
                // We need to do this because some cultures (e.g. "cs-CZ") which have
                // abbreviated month names with the same prefix.
                //
                int monthsInYear = (dtfi.GetMonthName(13).Length == 0 ? 12: 13);
                for (int i = 1; i <= monthsInYear; i++) {
                    String searchStr = dtfi.GetAbbreviatedMonthName(i);
                    int matchStrLen = searchStr.Length;
                    if ( dtfi.HasSpacesInMonthNames
                            ? str.MatchSpecifiedWords(searchStr, false, ref matchStrLen)
                            : str.MatchSpecifiedWord(searchStr)) {
                        if (matchStrLen > maxMatchStrLen) {
                            maxMatchStrLen = matchStrLen;
                            result = i;
                        }
                    }
                }

                // Search leap year form.
                if ((dtfi.FormatFlags & DateTimeFormatFlags.UseLeapYearMonth) != 0) {
                    int tempResult = str.MatchLongestWords(dtfi.internalGetLeapYearMonthNames(), ref maxMatchStrLen);
                    // We found a longer match in the leap year month name.  Use this as the result.
                    // The result from MatchLongestWords is 0 ~ length of word array.
                    // So we increment the result by one to become the month value.
                    if (tempResult >= 0) {
                        result = tempResult + 1;
                    }
                }


            }
            if (result > 0) {
                str.Index += (maxMatchStrLen - 1);
                return (true);
            }
            return false;
        }