DateTime::DateTime()
{
Timestamp now;
_utcTime = now.utcTime();
computeGregorian(julianDay());
computeDaytime();
}
DateTime& DateTime::operator = (const Timestamp& timestamp)
{
_utcTime = timestamp.utcTime();
computeGregorian(julianDay());
computeDaytime();
return *this;
}
DateTime& DateTime::operator -= (const Timespan& span)
{
_utcTime -= span.totalMicroseconds()*10;
computeGregorian(julianDay());
computeDaytime();
return *this;
}
DateTime& DateTime::operator += (const Timespan& span)
{
_utcTime += span*10;
computeGregorian(julianDay());
computeDaytime();
return *this;
}
static int weekNumber(const Date *theDate) {
int J = julianDay(theDate);
int d4 = (J+31741-(J%7))%146097%36524%1461;
int L = (int)(d4/1460);
int d1 = ((d4-L)%365)+L;
return (int)(d1/7)+1;
}
bool Date::setDate (int year, int month, int day)
{
if (isValid(year, month, day))
m_jd = julianDay(year, month, day);
else
m_jd = NullJulianDay;
return isValid();
}
static int dayOfWeek(const Date *theDate) {
int J = julianDay(theDate);
return (J+1)%7;
}
DateTime::DateTime(const Timestamp& timestamp):
_utcTime(timestamp.utcTime())
{
computeGregorian(julianDay());
computeDaytime();
}
int DateTime::dayOfWeek() const
{
return int((std::floor(julianDay() + 1.5))) % 7;
}
DateTime::DateTime(Timestamp::UtcTimeVal utcTime, Timestamp::TimeDiff diff):
_utcTime(utcTime + diff*10)
{
computeGregorian(julianDay());
computeDaytime();
}
/**
* @brief Returns the day of the year (1 to 365 or 366 on leap years) for
this date.
*
* @return The day of the year (1 to 365 or 366 on leap years) for
this date, or 0 if the date is invalid.
*/
int Date::dayOfYear() const
{
return !isValid()
? 0
: m_jd - julianDay(year(), 1, 1) + 1;
}
