// UEBT - Utilities Epoch-Based Time. Like Unix time but in milliseconds. Epoch is the same.
long long int dateTimeToUEBT(int year, int month, int day, int hour, int minute, int second,
int millisecond) {
long long int time = 0;
int yr = 1970;
int mt = 1;
int days;
if(year < yr) {
while(year+1 < yr) {
days = (isLeap(yr--) ? DAYS_PER_YEAR + 1 : DAYS_PER_YEAR);
time -= (long long int)days * SECONDS_PER_DAY*1000LL;
}
mt = 12;
while (month < mt) {
if(mt!=2) days = getMonthDays(mt--);
else { days = (isLeap(year)? 29 : 28); mt--; }
time -= (long long int)days * SECONDS_PER_DAY*1000LL;
}
days = getMonthDays(month) - day + 1;
time -= (long long int)days * SECONDS_PER_DAY*1000LL;
time -= (long long int)(23LL-hour) * SECONDS_PER_HOUR*1000LL;
time -= (long long int)(59LL-minute) * SECONDS_PER_MINUTE*1000LL;
time -= (long long int)(59LL-second)*1000LL;
time -= (long long int)(1000LL-millisecond);
} else {
while(yr < year) {
days = (isLeap(yr++) ? DAYS_PER_YEAR + 1 : DAYS_PER_YEAR);
time += (long long int)days * SECONDS_PER_DAY*1000LL;
}
while (mt < month) {
if(mt!=2) days = getMonthDays(mt++);
else { days = (isLeap(year)? 29 : 28); mt++; }
time += (long long int)days * SECONDS_PER_DAY*1000LL;
}
days = day - 1;
time += (long long int)days * SECONDS_PER_DAY*1000LL;
time += (long long int)hour * SECONDS_PER_HOUR*1000LL;
time += (long long int)minute * SECONDS_PER_MINUTE*1000LL;
time += (long long int)second*1000LL;
time += (long long int)millisecond;
}
return time;
}
main()
{
int year; /* 西暦 */
int month; /* 月 */
int days; /* 月の日数 */
int youbi; /* 最初の日の曜日番号 */
getYearMonth(&year, &month);
days = getMonthDays(year, month);
youbi = getWeekDay(year, month, 1);
printf("西暦%d年 %d月\n", year, month);
PrintCalendar(days, youbi);
}
Date & Date::addMonth(int month)
{
_tm.tm_mon = _tm.tm_mon + month;
_tm.tm_year = _tm.tm_year + _tm.tm_mon/12;
_tm.tm_mon = _tm.tm_mon % 12;
int monthDays = getMonthDays();
if (_tm.tm_mday > monthDays)
{
_tm.tm_mday = monthDays;
}
return *this;
}
Date & Date::addYear(int year)
{
_tm.tm_year += year;
if (_tm.tm_year < 0)
{
_tm.tm_year = 0;
}
int monthDays = getMonthDays();
if (_tm.tm_mday > monthDays)
{
_tm.tm_mday = monthDays;
}
return *this;
}
bool Date::isEndOfMonth() const
{
int curDay = day();
return curDay >= getMonthDays();
}
