internal static DateTime makeDT(Date d, Time t, TimeZone tz)
{
return new DateTime(d.m_year, d.m_month, d.m_day, t.m_hour, t.m_min, t.m_sec, t.m_ns, System.Int32.MaxValue, tz);
}
//////////////////////////////////////////////////////////////////////////
// Constructor - Date, Time
//////////////////////////////////////////////////////////////////////////
internal static DateTime makeDT(Date d, Time t)
{
return makeDT(d, t, TimeZone.m_cur);
}
public DateTime toDateTime(Date d, TimeZone tz)
{
return DateTime.makeDT(d, this, tz);
}
public Duration minusDate(Date that)
{
// short circuit if equal
if (this.Equals(that)) return Duration.Zero;
// compute so that a < b
Date a = this;
Date b = that;
if (a.compare(b) > 0) { b = this; a = that; }
// compute difference in days
long days = 0;
if (a.m_year == b.m_year)
{
days = b.dayOfYear() - a.dayOfYear();
}
else
{
days = (DateTime.isLeapYear(a.m_year) ? 366 : 365) - a.dayOfYear();
days += b.dayOfYear();
for (int i=a.m_year+1; i<b.m_year; ++i)
days += DateTime.isLeapYear(i) ? 366 : 365;
}
// negate if necessary if a was this
if (a == this) days = -days;
// map days into ns ticks
return Duration.make(days * Duration.nsPerDay);
}
public DateTime toDateTime(Date d)
{
return DateTime.makeDT(d, this);
}