Gregorian Gregorian::subtract_years(Gregorian const& date, year_t n) {
auto y = date.year() - n;
auto m = date.month();
auto d = date.day();
if (m == 2 && d == 29 && !is_gregorian_leapyear(y))
d = 28;
return Gregorian(year_t(y), month_t(m), day_t(d), date.hour(), date.minute(), date.second());
}
Gregorian Gregorian::add_months(Gregorian const& date, month_t n) {
/*auto m = date.month() + n;
auto y = date.year() + (m - 1) / 12;
m = (m - 1) % 12 + 1;
auto d = gregorian_days_in_month(m, is_gregorian_leapyear(y));
if (date.day() < d)
d = date.day();*/
year_t y = date.year() + n / 12;
month_t m = date.month() + n % 12;
auto adjust = (m - 1) / 12 + (m - 12) / 12;
y = y + adjust;
m = m - adjust * 12;
day_t d = min(date.day(), gregorian_days_in_month(m, is_gregorian_leapyear(y)));
return Gregorian(y, month_t(m), d, date.hour(), date.minute(), date.second());
}
Gregorian Gregorian::subtract_months(Gregorian const& date, month_t n) {
//auto m = date.month() - n;
//auto y = date.year() - (m - 1) / 12;
//m = (m - 1) % 12 + 1;
//auto d = gregorian_days_in_month(m, is_gregorian_leapyear(y));
//if (date.day() < d)
// d = date.day();
//return Gregorian(y, month_t(m), d, date.hour(), date.minute(), date.second());
year_t y = date.year() - n / 12;
month_t m = date.month() - n % 12;
auto adjust = (m - 1) / 12 + (m - 12) / 12;
y = y + adjust;
m = m - adjust * 12;
day_t d = min(date.day(), gregorian_days_in_month(m, is_gregorian_leapyear(y)));
return Gregorian(y, month_t(m), d, date.hour(), date.minute(), date.second());
}
//
// Generalized parse-from-string setup
//
void CssmUniformDate::setFromString(const char *src, const char *format, size_t fieldWidth)
{
// use a stack buffer
char str[20];
assert(fieldWidth < sizeof(str));
// make a copy with proper null terminator
memcpy(str, src, fieldWidth);
str[fieldWidth] = '\0';
// parse (with limited checks for bad field formats)
long year;
int month, day, hour, minute;
double second;
if (6 != sscanf(str, format,
&year, &month, &day, &hour, &minute, &second))
CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
// success
mTime = Gregorian((int)year, month, day, hour, minute, second);
}
//
// Uniform conversions with CssmDates
//
CssmUniformDate::CssmUniformDate(const CssmDate &date)
{
mTime = CFGregorianDateGetAbsoluteTime(Gregorian(date.year(), date.month(), date.day()),
NULL);
}
Islamic::Islamic() { // TODO
jd_to_islamic(Gregorian().to_jd(), year_, month_, day_, hour_, minute_, second_);
}
Julian::Julian() {
jd_to_julian(Gregorian().to_jd(),year_,month_,day_,hour_,minute_,second_);
}