protected override void VirtualSpecializedAdd(ref DLink pHead, DLink pDLink)
{
PriorityDLink pPDLink = (PriorityDLink)pDLink;
// Lets child class set the node's data values so that it can be sorted when added
DerivedInitializeNode(pPDLink);
PriorityDLink.SortedAdd(ref pHead, pPDLink);
}
protected override int CompareTo(PriorityDLink pPDLink)
{
float comparisonVal = this.triggerTime - ((TimeEvent)pPDLink).triggerTime;
if (comparisonVal > 0.0f)
{
return(1);
}
else if (comparisonVal < 0.0f)
{
return(-1);
}
else
{
return(0);
}
}
protected abstract void DerivedInitializeNode(PriorityDLink pPDLink);
/// <summary> /// Returns less than zero if this is less than pPDLink /// Returns zero if this equals pPDLink /// Returns greater than zero if this greater than pPDLink /// </summary> /// <returns></returns> protected abstract int CompareTo(PriorityDLink pPDLink);
public static void SortedAdd(ref DLink pHead, PriorityDLink pPDLink)
{
Debug.Assert(pPDLink != null);
if (pHead == null)
{
// first node in empty list
pHead = pPDLink;
pPDLink.pNext = null;
pPDLink.pPrev = null;
}
else
{
// add to correct sorted position in list
PriorityDLink tmpNode = (PriorityDLink)pHead;
while (tmpNode != null)
{
if (pPDLink.CompareTo(tmpNode) <= 0)
{
// Add PDLink into list before tmpNode
if (tmpNode.pPrev == null)
{
//tmpNode is the first node, insert pPDLink in front of tmpNode to become the new first node.
pPDLink.pNext = tmpNode;
pPDLink.pPrev = null;
tmpNode.pPrev = pPDLink;
pHead = pPDLink;
}
else if (tmpNode.pPrev != null)
{
//TmpNode has a node before it, insert pPDLink as a middle node in between TmpNode and the node before it.
pPDLink.pNext = tmpNode;
pPDLink.pPrev = tmpNode.pPrev;
((PriorityDLink)tmpNode.pPrev).pNext = pPDLink;
tmpNode.pPrev = pPDLink;
}
else
{
// should never get to this case
Debug.Assert(false);
}
break;
}
if (tmpNode.pNext == null)
{
// Add to the end of the list
pPDLink.pNext = null;
pPDLink.pPrev = tmpNode;
tmpNode.pNext = pPDLink;
break;
}
tmpNode = (PriorityDLink)tmpNode.pNext;
}
}
// worst case, pHead was null initially, now we added a node so... this is true
Debug.Assert(pHead != null);
}
protected override void DerivedInitializeNode(PriorityDLink pPDLink)
{
((TimeEvent)pPDLink).Set(pTmpTimeName, pTmpCommand, pTmpDeltaTimeToTrigger);
}