protected static int StampGrow(Id i, Event e)
{
int cost;
if (i.IsLeaf
&& i.Value == 1
&& e.IsLeaf)
{
e.SetValue(e.Value + 1);
return 0;
}
if (e.IsLeaf)
{
e.SetAsNode();
cost = StampGrow(i, e);
return cost + 1000;
}
if (i.IsLeaf == false
&& i.Left.IsLeaf
&& i.Left.Value == 0)
{
cost = StampGrow(i.Right, e.Right);
return cost + 1;
}
if (i.IsLeaf == false
&& i.Right.IsLeaf
&& i.Right.Value == 0)
{
cost = StampGrow(i.Left, e.Left);
return cost + 1;
}
if (i.IsLeaf == false)
{
var el = Event.Clone(e.Left);
var er = Event.Clone(e.Right);
var costr = StampGrow(i.Right, e.Right);
var costl = StampGrow(i.Left, e.Left);
if (costl < costr)
{
e.SetRight(er);
return costl + 1;
}
e.SetLeft(el);
return costr + 1;
}
throw new StampOperationException(string.Format("Grow failed: id: {0}, event: {1}", i, e));
}
public static void Join(Event e1, Event e2)
{
if (!e1.IsLeaf
&& !e2.IsLeaf
&& e1.Value > e2.Value)
{
Join(e2, e1);
e1.Copy(e2);
e1.Normalize();
return;
}
if (!e1.IsLeaf
&& !e2.IsLeaf
&& e1.Value <= e2.Value)
{
var d = e2.Value - e1.Value;
e2.Left.Lift(d);
e2.Right.Lift(d);
Join(e1.Left, e2.Left);
Join(e1.Right, e2.Right);
e1.Normalize();
return;
}
if (e1.IsLeaf
&& !e2.IsLeaf)
{
e1.SetAsNode();
Join(e1, e2);
e1.Normalize();
return;
}
if (!e1.IsLeaf
&& e2.IsLeaf)
{
e2.SetAsNode();
Join(e1, e2);
e1.Normalize();
return;
}
if (e1.IsLeaf
&& e2.IsLeaf)
{
e1.Value = GetMaxValue(e1, e2);
e1.Normalize();
return;
}
throw new EventOperationException("Event Join failed", e1, e2);
}
