public void Exit(LinkedAgentPointer pointer)
{
var isFirst = pointer == First;
var isLast = pointer == Last;
var next = pointer.Next;
var previous = pointer.Previous;
if (previous != null)
{
previous.Next = next;
}
if (next != null)
{
next.Previous = previous;
}
pointer.Next = pointer.Previous = null;
pointer.Chain = null;
if (isFirst)
{
First = previous;
}
if (isLast)
{
Last = next;
}
}
public LinkedAgentPointer Enter(IAgent agent)
{
if (First == null && Last == null)
{
return(Last = First = new LinkedAgentPointer(agent, this));
}
var current = Last;
while (current != null && current.Agent.Progress < agent.Progress)
{
current = current.Next;
}
LinkedAgentPointer previous, next;
if (current == null) // we went to far
{
previous = First;
next = null;
}
else
{
previous = current.Previous;
next = current;
}
current = new LinkedAgentPointer(agent, this);
current.Next = next;
if (next != null)
{
next.Previous = current;
}
current.Previous = previous;
if (previous != null)
{
previous.Next = current;
}
if (current.Next == null)
{
First = current;
}
if (current.Previous == null)
{
Last = current;
}
return(current);
}