JulianDate::DateDecomposition JulianDate::getDecomposition() const {
const int D4 = 365 * 4 + 1;
const int D1 = 365;
const int d = mod_julian_day() - JULIAN_DAY_ZERO_MJD_OFFSET;
const int c4 = d / D4;
const int d4 = d % D4;
const int cp1 = std::min(d4 / (D1 + 1), 1);
const int dp1 = d4 - cp1 * (D1 + 1);
const int cb1 = cp1 * dp1 / D1;
const int db1 = dp1 - cb1 * D1;
return DateDecomposition{4 * c4 + cp1 + cb1, db1};
}
int Date::operator-(const Date & d) const
{
return mod_julian_day() - d.mod_julian_day();
}
bool Date::operator<(const Date & d) const
{
return mod_julian_day() < d.mod_julian_day();
}
bool Date::operator>=(const Date & d) const
{
return mod_julian_day() >= d.mod_julian_day();
}
Julian::Julian(const Date & date) : GreLian(date)
{
int diff = mod_julian_day() - date.mod_julian_day();
*this -= diff;
}
Julian::Julian(Date* & dp) : GreLian(*dp)
{
int diff = mod_julian_day() - dp->mod_julian_day();
*this -= diff;
}
lab2::Gregorian::Gregorian(const lab2::Date &date) {
_year = date.year();
_month = date.month();
_day = date.day();
*this += date.mod_julian_day()-mod_julian_day();
}
unsigned int WesternDate::week_day() const {
int wd = (mod_julian_day()+ 2) % wkds.size();
++wd;
return wd;
}
int Date::operator -(const Date & d) const{
int diff = mod_julian_day() - d.mod_julian_day();
/*if (diff < 0)
return diff * -1;*/
return diff;
}
bool Date::operator<=(const Date &date) const {
return mod_julian_day() <= date.mod_julian_day();
}
const bool Date::operator>(const Date& d) const{
return (mod_julian_day() > d.mod_julian_day());
}