BOOL DateTime::operator>(const DateTime& date) const
{ //ASSERT(GetStatus() == valid);
//ASSERT(date.GetStatus() == valid);
// Handle negative dates
return DoubleFromDate(dt_) > DoubleFromDate(date.dt_);
}
BOOL DateTime::operator<=(const DateTime& date) const
{
//ASSERT(GetStatus() == valid);
//ASSERT(date.GetStatus() == valid);
// Handle negative dates
return DoubleFromDate(m_dt) <= DoubleFromDate(date.m_dt);
}
DateTime DateTime::operator-(const DateTimeSpan& dateSpan) const
{
DateTime dateResult; // Initializes status_ to valid
// If either operand NULL, result NULL
if (GetStatus() == null || dateSpan.GetStatus() == null)
{
dateResult.SetStatus(null);
return dateResult;
}
// If either operand invalid, result invalid
if (GetStatus() == invalid || dateSpan.GetStatus() == invalid)
{
dateResult.SetStatus(invalid);
return dateResult;
}
// Compute the actual date difference by subtracting underlying dates
dateResult = DateFromDouble(DoubleFromDate(dt_) - dateSpan.span_);
// Validate within range
dateResult.CheckRange();
return dateResult;
}
DateTimeSpan DateTime::operator-(const DateTime& date) const
{
DateTimeSpan spanResult;
// If either operand NULL, result NULL
if (GetStatus() == null || date.GetStatus() == null)
{
spanResult.SetStatus(DateTimeSpan::null);
return spanResult;
}
// If either operand invalid, result invalid
if (GetStatus() == invalid || date.GetStatus() == invalid)
{
spanResult.SetStatus(DateTimeSpan::invalid);
return spanResult;
}
// Return result (span can't be invalid, so don't check range)
return DoubleFromDate(dt_) - DoubleFromDate(date.dt_);
}
