// Returns true if the specified date falls inside the range of this date instance.
private bool Encompasses( CPGDate date )
{
if (date == null)
{
return false;
}
switch( m_etType )
{
case EType.PeriodFrom:
case EType.RangeAfter:
return date.IsAfter( m_uDay, m_uMonth, m_year.m_nYear );
case EType.PeriodTo:
case EType.RangeBefore:
return date.IsBefore( m_uDay, m_uMonth, m_year.m_nYear );
case EType.PeriodFromTo:
case EType.RangeBetween:
return date.IsBefore( m_uDayTo, m_uMonthTo, m_yearTo.m_nYear )
&& date.IsAfter( m_uDay, m_uMonth, m_year.m_nYear );
case EType.Single:
case EType.ApproximatedAbout:
case EType.ApproximatedCalculated:
case EType.ApproximatedEstimate:
case EType.Interpreted:
case EType.Phrase:
default:
return date.Encompasses( m_uDay, m_uMonth, m_year.m_nYear );
}
}
// Returns the number of days difference between the two given dates, or 0 if the date ranges overlap.
public static int Difference( CPGDate date1, CPGDate date2 )
{
AssertLower( ref date1 );
AssertHigher( ref date2 );
// If date2 encompasses date1, difference = 0
if (date2.Encompasses(date1))
{
return 0;
}
// If date1 encompasses date2, difference = 0
if (date1.Encompasses(date2))
{
return 0;
}
return CountDays( date1.m_uDay, date1.m_uMonth, date1.m_year.m_nYear, date2.m_uDay, date2.m_uMonth, date2.m_year.m_nYear );
}