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@ -49,6 +49,8 @@ enum class DatePart {
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Day /**< day */
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};
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struct Date;
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class CPP_UTILITIES_EXPORT DateTime {
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public:
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explicit constexpr DateTime();
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@ -70,6 +72,7 @@ public:
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int day() const;
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int dayOfYear() const;
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constexpr DayOfWeek dayOfWeek() const;
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constexpr Date date() const;
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constexpr int hour() const;
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constexpr int minute() const;
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constexpr int second() const;
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@ -505,6 +508,54 @@ inline DateTime &DateTime::operator-=(const TimeSpan &timeSpan)
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m_ticks -= timeSpan.m_ticks;
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return *this;
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}
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struct Date {
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constexpr Date(DateTime dateTime);
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int year;
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int month;
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int day;
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};
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constexpr Date::Date(DateTime dateTime)
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: year(0)
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, month(0)
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, day(0)
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{
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const int fullDays = dateTime.totalTicks() / TimeSpan::m_ticksPerDay;
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const int full400YearBlocks = fullDays / DateTime::m_daysPer400Years;
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const int daysMinusFull400YearBlocks = fullDays - full400YearBlocks * m_daysPer400Years;
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int full100YearBlocks = daysMinusFull400YearBlocks / m_daysPer100Years;
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if (full100YearBlocks == 4) {
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full100YearBlocks = 3;
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}
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const int daysMinusFull100YearBlocks = daysMinusFull400YearBlocks - full100YearBlocks * m_daysPer100Years;
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const int full4YearBlocks = daysMinusFull100YearBlocks / m_daysPer4Years;
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const int daysMinusFull4YearBlocks = daysMinusFull100YearBlocks - full4YearBlocks * m_daysPer4Years;
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int full1YearBlocks = daysMinusFull4YearBlocks / m_daysPerYear;
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if (full1YearBlocks == 4) {
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full1YearBlocks = 3;
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}
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if (part == DatePart::Year) {
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return full400YearBlocks * 400 + full100YearBlocks * 100 + full4YearBlocks * 4 + full1YearBlocks + 1;
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}
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const int restDays = daysMinusFull4YearBlocks - full1YearBlocks * m_daysPerYear;
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if (part == DatePart::DayOfYear) { // day
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return restDays + 1;
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}
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const int *const daysToMonth = (full1YearBlocks == 3 && (full4YearBlocks != 24 || full100YearBlocks == 3)) ? m_daysToMonth366 : m_daysToMonth365;
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int month = 1;
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while (restDays >= daysToMonth[month]) {
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++month;
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}
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if (part == DatePart::Month) {
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return month;
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} else if (part == DatePart::Day) {
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return restDays - daysToMonth[month - 1] + 1;
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}
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return 0;
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}
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} // namespace ChronoUtilities
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namespace std {
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@ -14,6 +14,7 @@
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namespace ChronoUtilities {
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class DateTime;
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struct Date;
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/*!
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* \brief Specifies the output format.
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@ -27,6 +28,7 @@ enum class TimeSpanOutputFormat {
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class CPP_UTILITIES_EXPORT TimeSpan {
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friend class DateTime;
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friend struct Date;
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public:
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explicit constexpr TimeSpan();
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@ -105,6 +105,10 @@ void ChronoTests::testDateTime()
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const auto delta = DateTime::gmtNow() - DateTime::exactGmtNow();
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CPPUNIT_ASSERT(delta < TimeSpan::fromSeconds(2) && delta > TimeSpan::fromSeconds(-2));
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#endif
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// test boundaries
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CPPUNIT_ASSERT_EQUAL("0001-01-01 00:00:00"s, DateTime().toString());
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CPPUNIT_ASSERT_EQUAL("58456-05-28 05:36:10.955"s, DateTime::eternity().toString());
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}
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/*!
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