| public static GetStandardPattern ( char format, DateTimeFormatInfo dfi, bool &useutc, bool &use_invariant ) : string | ||
| format | char | |
| dfi | DateTimeFormatInfo | |
| useutc | bool | |
| use_invariant | bool | |
| return | string | |
public string ToString(string format, IFormatProvider formatProvider)
{
DateTimeFormatInfo dfi = DateTimeFormatInfo.GetInstance(formatProvider);
if (format == null || format == String.Empty)
{
format = dfi.ShortDatePattern + " " + dfi.LongTimePattern + " zzz";
}
bool to_utc = false, use_invariant = false;
if (format.Length == 1)
{
char fchar = format [0];
try {
format = DateTimeUtils.GetStandardPattern(fchar, dfi, out to_utc, out use_invariant, true);
} catch {
format = null;
}
if (format == null)
{
throw new FormatException("format is not one of the format specifier characters defined for DateTimeFormatInfo");
}
}
return(to_utc ? DateTimeUtils.ToString(UtcDateTime, TimeSpan.Zero, format, dfi) : DateTimeUtils.ToString(DateTime, Offset, format, dfi));
}
public static string GetStandardPattern(char format, DateTimeFormatInfo dfi, out bool useutc, out bool use_invariant)
{
return(DateTimeUtils.GetStandardPattern(format, dfi, out useutc, out use_invariant, false));
}
private static bool DoParse(string input,
string format,
bool exact,
out DateTimeOffset result,
DateTimeFormatInfo dfi,
DateTimeStyles styles)
{
if ((styles & DateTimeStyles.AllowLeadingWhite) != 0)
{
format = format.TrimStart(null);
input = input.TrimStart(null);
}
if ((styles & DateTimeStyles.AllowTrailingWhite) != 0)
{
format = format.TrimEnd(null);
input = input.TrimEnd(null);
}
bool allow_white_spaces = false;
if ((styles & DateTimeStyles.AllowInnerWhite) != 0)
{
allow_white_spaces = true;
}
bool useutc = false, use_invariants = false;
if (format.Length == 1)
{
format = DateTimeUtils.GetStandardPattern(format[0], dfi, out useutc, out use_invariants, true);
}
int year = -1;
int month = -1;
int day = -1;
int partial_hour = -1; // for 'hh tt' formats
int hour = -1;
int minute = -1;
int second = -1;
double fraction = -1;
int temp_int = -1;
TimeSpan offset = TimeSpan.MinValue;
result = DateTimeOffset.MinValue;
int fi = 0; //format iterator
int ii = 0; //input iterator
while (fi < format.Length)
{
int tokLen;
char ch = format [fi];
switch (ch)
{
case 'd':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (day != -1 || tokLen > 4)
{
return(false);
}
if (tokLen <= 2)
{
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out day);
}
else
{
ii += ParseEnum(input, ii, tokLen == 3 ? dfi.AbbreviatedDayNames : dfi.DayNames, allow_white_spaces, out temp_int);
}
break;
case 'f':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
ii += ParseNumber(input, ii, tokLen, true, allow_white_spaces, out temp_int);
if (fraction >= 0 || tokLen > 7 || temp_int == -1)
{
return(false);
}
fraction = (double)temp_int / Math.Pow(10, tokLen);
break;
case 'F':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
int digits;
int read = ParseNumber(input, ii, tokLen, true, allow_white_spaces, out temp_int, out digits);
if (temp_int == -1)
{
ii += ParseNumber(input, ii, digits, true, allow_white_spaces, out temp_int);
}
else
{
ii += read;
}
if (fraction >= 0 || tokLen > 7 || temp_int == -1)
{
return(false);
}
fraction = (double)temp_int / Math.Pow(10, digits);
break;
case 'h':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (hour != -1 || tokLen > 2)
{
return(false);
}
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out temp_int);
if (temp_int == -1)
{
return(false);
}
if (partial_hour == -1)
{
partial_hour = temp_int;
}
else
{
hour = partial_hour + temp_int;
}
break;
case 'H':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (hour != -1 || tokLen > 2)
{
return(false);
}
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out hour);
break;
case 'm':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (minute != -1 || tokLen > 2)
{
return(false);
}
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out minute);
break;
case 'M':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (month != -1 || tokLen > 4)
{
return(false);
}
if (tokLen <= 2)
{
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out month);
}
else
{
ii += ParseEnum(input, ii, tokLen == 3 ? dfi.AbbreviatedMonthNames : dfi.MonthNames, allow_white_spaces, out month);
month += 1;
}
break;
case 's':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (second != -1 || tokLen > 2)
{
return(false);
}
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out second);
break;
case 't':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (hour != -1 || tokLen > 2)
{
return(false);
}
ii += ParseEnum(input, ii,
tokLen == 1 ? new string[] { new string (dfi.AMDesignator[0], 1), new string (dfi.PMDesignator[0], 0) }
: new string[] { dfi.AMDesignator, dfi.PMDesignator },
allow_white_spaces, out temp_int);
if (temp_int == -1)
{
return(false);
}
if (partial_hour == -1)
{
partial_hour = temp_int * 12;
}
else
{
hour = partial_hour + temp_int * 12;
}
break;
case 'y':
if (year != -1)
{
return(false);
}
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (tokLen <= 2)
{
ii += ParseNumber(input, ii, 2, tokLen == 2, allow_white_spaces, out year);
if (year != -1)
{
year += DateTime.Now.Year - DateTime.Now.Year % 100;
}
}
else if (tokLen <= 4) // yyy and yyyy accept up to 5 digits with leading 0
{
int digit_parsed;
ii += ParseNumber(input, ii, 5, false, allow_white_spaces, out year, out digit_parsed);
if (digit_parsed < tokLen || (digit_parsed > tokLen && (year / Math.Pow(10, digit_parsed - 1) < 1)))
{
return(false);
}
}
else
{
ii += ParseNumber(input, ii, tokLen, true, allow_white_spaces, out year);
}
break;
case 'z':
tokLen = DateTimeUtils.CountRepeat(format, fi, ch);
if (offset != TimeSpan.MinValue || tokLen > 3)
{
return(false);
}
int off_h, off_m = 0, sign;
temp_int = 0;
ii += ParseEnum(input, ii, new string [] { "-", "+" }, allow_white_spaces, out sign);
ii += ParseNumber(input, ii, 2, tokLen != 1, false, out off_h);
if (tokLen == 3)
{
ii += ParseEnum(input, ii, new string [] { dfi.TimeSeparator }, false, out temp_int);
ii += ParseNumber(input, ii, 2, true, false, out off_m);
}
if (off_h == -1 || off_m == -1 || sign == -1)
{
return(false);
}
if (sign == 0)
{
sign = -1;
}
offset = new TimeSpan(sign * off_h, sign * off_m, 0);
break;
case ':':
tokLen = 1;
ii += ParseEnum(input, ii, new string [] { dfi.TimeSeparator }, false, out temp_int);
if (temp_int == -1)
{
return(false);
}
break;
case '/':
tokLen = 1;
ii += ParseEnum(input, ii, new string [] { dfi.DateSeparator }, false, out temp_int);
if (temp_int == -1)
{
return(false);
}
break;
case '%':
tokLen = 1;
if (fi != 0)
{
return(false);
}
break;
case ' ':
tokLen = 1;
ii += ParseChar(input, ii, ' ', false, out temp_int);
if (temp_int == -1)
{
return(false);
}
break;
case '\\':
tokLen = 2;
ii += ParseChar(input, ii, format [fi + 1], allow_white_spaces, out temp_int);
if (temp_int == -1)
{
return(false);
}
break;
default:
//Console.WriteLine ("un-parsed character: {0}", ch);
tokLen = 1;
ii += ParseChar(input, ii, format [fi], allow_white_spaces, out temp_int);
if (temp_int == -1)
{
return(false);
}
break;
}
fi += tokLen;
}
//Console.WriteLine ("{0}-{1}-{2} {3}:{4} {5}", year, month, day, hour, minute, offset);
if (offset == TimeSpan.MinValue && (styles & DateTimeStyles.AssumeLocal) != 0)
{
offset = TimeZone.CurrentTimeZone.GetUtcOffset(DateTime.Now);
}
if (offset == TimeSpan.MinValue && (styles & DateTimeStyles.AssumeUniversal) != 0)
{
offset = TimeSpan.Zero;
}
if (hour < 0)
{
hour = 0;
}
if (minute < 0)
{
minute = 0;
}
if (second < 0)
{
second = 0;
}
if (fraction < 0)
{
fraction = 0;
}
if (year > 0 && month > 0 && day > 0)
{
result = new DateTimeOffset(year, month, day, hour, minute, second, 0, offset);
result = result.AddSeconds(fraction);
if ((styles & DateTimeStyles.AdjustToUniversal) != 0)
{
result = result.ToUniversalTime();
}
return(true);
}
return(false);
}
