private void growHeap()
{
capacity = (capacity * 2) + 1;
HeapEntry <T>[] newHeap = new HeapEntry <T> [capacity];
System.Array.Copy(heap, 0, newHeap, 0, count);
heap = newHeap;
}
private void bubbleUp(int index, HeapEntry <T> he)
{
int parent = (index - 1) / 2;
// note: (index > 0) means there is a parent
while ((index > 0) && (heap[parent].Priority > he.Priority))
{
heap[index] = heap[parent];
index = parent;
parent = (index - 1) / 2;
}
heap[index] = he;
}
private void trickleDown(int index, HeapEntry <T> he)
{
int child = (index * 2) + 1;
while (child < count)
{
if (((child + 1) < count) &&
(heap[child].Priority > heap[child + 1].Priority))
{
child++;
}
heap[index] = heap[child];
index = child;
child = (index * 2) + 1;
}
bubbleUp(index, he);
}