public void Union(DateRange intv)
{
int i = 0;
int j = 0;
var iCount = _intervals.Count;
var jCount = intv._intervals.Count;
var union = new List <DateInterval>();
DateTime intStart = DateTime.MaxValue;
DateTime intEnd = DateTime.MaxValue;
while (i < _intervals.Count || j < intv._intervals.Count)
{
DateInterval next;
if (i < iCount && j < jCount)
{
var iR = _intervals[i];
var jR = intv._intervals[j];
if (iR.Start < jR.Start)
{
next = iR;
i++;
}
else
{
next = jR;
j++;
}
}
else if (i < iCount)
{
next = _intervals[i];
i++;
}
else
{
next = intv._intervals[j];
j++;
}
if (next.Start > intEnd)
{
union.Add(new DateInterval(intStart, intEnd));
intStart = next.Start;
}
else
{
intStart = Min(next.Start, intStart);
}
if (i + j > 1)
{
intEnd = Max(intEnd, next.End);
}
else
{
// First step.
intEnd = next.End;
}
}
if (intStart < intEnd)
{
union.Add(new DateInterval(intStart, intEnd));
}
_intervals = union;
}
public DateRange(DateRange timestamps)
{
_intervals = new List <DateInterval>(timestamps._intervals);
}