static void TestTimeArithmetics(void) {
using vislib::sys::DateTime;
using vislib::sys::DateTimeSpan;
DateTime dateTime;
dateTime.Set(1, 1, 1, 0, 0, 0);
dateTime += DateTimeSpan::OneMillisecond();
::AssertEqual("Add 1 ms", dateTime, DateTime(1, 1, 1, 0, 0, 0, 1));
dateTime.Set(1, 1, 1, 0, 0, 0, 1);
dateTime += DateTimeSpan::OneMillisecond(false);
::AssertEqual("Add -1 ms", dateTime, DateTime(1, 1, 1, 0, 0, 0, 0));
dateTime.Set(1, 1, 1, 0, 0, 0, 1);
dateTime -= DateTimeSpan::OneMillisecond();
::AssertEqual("Subtract 1 ms", dateTime, DateTime(1, 1, 1, 0, 0, 0, 0));
dateTime.Set(1, 1, 1, 0, 0, 0);
dateTime -= DateTimeSpan::OneMillisecond(false);
::AssertEqual("Subtract -1 ms", dateTime, DateTime(1, 1, 1, 0, 0, 0, 1));
}
DateTime DateTime::FromUnixTimeStamp(int64 unixts, int nsec)
{
int msec = nsec / 1000000;
// 0 == 1970-01-01
int64 chuts = unixts;
chuts *= 1000;
chuts += msec;
DateTime date;
date.Set(1970);
date.m_stamp += chuts;
date.UpdateFieldsFromStamp();
return date;
}
int64 DateTime::ToUnixTimeStamp(int* pnsec) const
{
DateTime dateBase;
dateBase.Set(1970);
int64 dif = m_stamp - dateBase.m_stamp;
if( pnsec )
{
*pnsec = (dif % 1000) * 1000000;
}
dif /= 1000;
if( dif < 0 )
dif = 0;
return dif;
}
