private bool ParseRelUnits(ClockToken[] dt, ref System.Int32 parsePos, ClockRelTimespan diff)
// time difference to evaluate
{
int pos = parsePos;
if (pos + 2 < dt.Length && dt[pos].is_Renamed('+') && dt[pos + 1].UNumber && dt[pos + 2].Unit)
{
diff.addUnit(dt[pos + 2], dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 2 < dt.Length && dt[pos].is_Renamed('-') && dt[pos + 1].UNumber && dt[pos + 2].Unit)
{
diff.addUnit(dt[pos + 2], -dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 1 < dt.Length && dt[pos].UNumber && dt[pos + 1].Unit)
{
diff.addUnit(dt[pos + 1], dt[pos].Int);
parsePos = pos + 2;
return true;
}
else if (pos + 2 < dt.Length && dt[pos].is_Renamed(ClockToken.NEXT) && dt[pos + 1].UNumber && dt[pos + 2].Unit)
{
diff.addUnit(dt[pos + 2], dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 1 < dt.Length && dt[pos].is_Renamed(ClockToken.NEXT) && dt[pos + 1].Unit)
{
diff.addUnit(dt[pos + 1]);
parsePos = pos + 2;
return true;
}
if (pos < dt.Length && dt[pos].Unit)
{
diff.addUnit(dt[pos]);
parsePos = pos + 1;
return true;
}
return false;
}
private bool ParseOrdMonth(ClockToken[] dt, ref System.Int32 parsePos, ClockRelTimespan diff)
// time difference to evaluate
{
int pos = parsePos;
if (pos + 2 < dt.Length && dt[pos].is_Renamed(ClockToken.NEXT) && dt[pos + 1].UNumber && dt[pos + 2].is_Renamed(ClockToken.MONTH))
{
diff.addOrdMonth(dt[pos + 2].Int, dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 1 < dt.Length && dt[pos].is_Renamed(ClockToken.NEXT) && dt[pos + 1].is_Renamed(ClockToken.MONTH))
{
diff.addOrdMonth(dt[pos + 1].Int, 1);
parsePos = pos + 2;
return true;
}
return false;
}
private bool ParseRelSpec(ClockToken[] dt, ref System.Int32 parsePos, ClockRelTimespan diff)
// time difference to evaluate
{
if (!ParseRelUnits(dt, ref parsePos, diff))
{
return false;
}
int pos = parsePos;
if (pos < dt.Length && dt[pos].is_Renamed(ClockToken.AGO))
{
diff.negate();
parsePos = pos + 1;
}
return true;
}
private bool ParseDay(ClockToken[] dt, ref System.Int32 parsePos, ClockRelTimespan diff)
// time difference to evaluate
{
int pos = parsePos;
if (pos + 2 < dt.Length && dt[pos].is_Renamed('+') && dt[pos + 1].UNumber && dt[pos + 2].is_Renamed(ClockToken.DAY))
{
diff.setWeekday(dt[pos + 2].Int, dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 2 < dt.Length && dt[pos].is_Renamed('-') && dt[pos + 1].UNumber && dt[pos + 2].is_Renamed(ClockToken.DAY))
{
diff.setWeekday(dt[pos + 2].Int, -dt[pos + 1].Int);
parsePos = pos + 3;
return true;
}
if (pos + 1 < dt.Length && dt[pos].is_Renamed(ClockToken.NEXT) && dt[pos + 1].is_Renamed(ClockToken.DAY))
{
diff.setWeekday(dt[pos + 1].Int, 2);
parsePos = pos + 2;
return true;
}
if (pos + 1 < dt.Length && dt[pos].is_Renamed(ClockToken.DAY) && dt[pos + 1].is_Renamed(','))
{
diff.setWeekday(dt[pos].Int);
parsePos = pos + 2;
return true;
}
if (pos + 1 < dt.Length && dt[pos].UNumber && dt[pos + 1].is_Renamed(ClockToken.DAY))
{
diff.setWeekday(dt[pos + 1].Int, dt[pos].Int);
parsePos = pos + 2;
return true;
}
if (pos < dt.Length && dt[pos].is_Renamed(ClockToken.DAY))
{
diff.setWeekday(dt[pos].Int);
parsePos = pos + 1;
return true;
}
return false;
}
private System.DateTime GetDate(string dateString, System.DateTime baseDate, bool useGMT)
{
if (useGMT)
{
baseDate = baseDate.ToUniversalTime();
}
TclDateTime calendar = new TclDateTime();
calendar.dateTime = baseDate;
calendar.hour = 0;
calendar.minute = 0;
calendar.second = 0;
calendar.millisecond = 0;
ClockToken[] dt = GetTokens(dateString, false);
System.Int32 parsePos = 0;
ClockRelTimespan diff = new ClockRelTimespan();
int hasTime = 0;
int hasZone = 0;
int hasDate = 0;
int hasDay = 0;
int hasOrdMonth = 0;
int hasRel = 0;
while (parsePos < dt.Length)
{
if (ParseTime(dt, ref parsePos, calendar))
{
hasTime++;
}
else if (ParseZone(dt, ref parsePos, calendar))
{
hasZone++;
}
else if (ParseIso(dt, ref parsePos, calendar))
{
hasDate++;
}
else if (ParseDate(dt, ref parsePos, calendar))
{
hasDate++;
}
else if (ParseDay(dt, ref parsePos, diff))
{
hasDay++;
}
else if (ParseOrdMonth(dt, ref parsePos, diff))
{
hasOrdMonth++;
}
else if (ParseRelSpec(dt, ref parsePos, diff))
{
hasRel++;
}
else if (ParseNumber(dt, ref parsePos, calendar, hasDate > 0 && hasTime > 0 && hasRel == 0))
{
if (hasDate == 0 || hasTime == 0 || hasRel > 0)
{
hasTime++;
}
}
else if (ParseTrek(dt, ref parsePos, calendar))
{
hasDate++;
hasTime++;
}
else
{
goto failed;
}
}
if (hasTime > 1 || hasZone > 1 || hasDate > 1 || hasDay > 1 || hasOrdMonth > 1)
{
goto failed;
}
// The following line handles years that are specified using
// only two digits. The line of code below implements a policy
// defined by the X/Open workgroup on the millinium rollover.
// Note: some of those dates may not actually be valid on some
// platforms. The POSIX standard startes that the dates 70-99
// shall refer to 1970-1999 and 00-38 shall refer to 2000-2038.
// This later definition should work on all platforms.
int thisYear = calendar.year;
if (thisYear < 100)
{
if (thisYear >= 69)
{
calendar.year = thisYear + 1900;
}
else
{
calendar.year = thisYear + 2000;
}
}
if (hasRel > 0)
{
if (hasTime == 0 && hasDate == 0 && hasDay == 0)
{
calendar.dateTime = baseDate;
}
// Certain JDK implementations are buggy WRT DST.
// Work around this issue by adding a day instead
// of a days worth of seconds.
int seconds_in_day = (60 * 60 * 24);
int seconds = diff.Seconds;
bool negative_seconds = (seconds < 0);
int days = 0;
if (negative_seconds)
seconds *= (-1);
while (seconds >= seconds_in_day)
{
seconds -= seconds_in_day;
days++;
}
if (negative_seconds)
{
seconds *= (-1);
days *= (-1);
}
if (days != 0)
{
// calendar.add(SupportClass.CalendarManager.DATE, days);
}
if (seconds != 0)
{
// calendar.add(SupportClass.CalendarManager.SECOND, seconds);
}
// calendar.add(SupportClass.CalendarManager.MONTH, diff.Months);
}
if (hasDay > 0 && hasDate == 0)
{
SetWeekday(calendar, diff);
}
if (hasOrdMonth > 0)
{
SetOrdMonth(calendar, diff);
}
try
{
return calendar.dateTime;
}
catch (Exception)
{
throw new FormatException();
}
failed:
throw new FormatException();
}
private void SetOrdMonth(TclDateTime calendar, ClockRelTimespan diff)
// time difference to evaluate
{
int month = diff.Months;
int ordMonth = diff.OrdMonth;
// calendar.add(SupportClass.CalendarManager.MONTH, 1); /* we want to get the next month... */
// while (SupportClass.CalendarManager.manager.Get(calendar, SupportClass.CalendarManager.MONTH) != month)
// {
// calendar.add(SupportClass.CalendarManager.MONTH, 1);
// }
// if (ordMonth > 1)
// {
// calendar.add(SupportClass.CalendarManager.YEAR, ordMonth - 1);
// }
calendar.day = 1;
calendar.hour = 0;
calendar.minute = 0;
calendar.second = 0;
}
private void SetWeekday(TclDateTime calendar, ClockRelTimespan diff)
// time difference to evaluate
{
int weekday = diff.getWeekday();
int dayOrdinal = diff.DayOrdinal;
// ATK
// while (SupportClass.CalendarManager.manager.Get(calendar, SupportClass.CalendarManager.DAY_OF_WEEK) != weekday)
// {
//
// calendar.add(SupportClass.CalendarManager.DATE, 1);
// }
// if (dayOrdinal > 1)
// {
//
// calendar.add(SupportClass.CalendarManager.DATE, 7 * (dayOrdinal - 1));
// }
}