public void AddFirst(CustomLinkedListNode <T> node)
{
Head.Previous = node;
node.Next = Head;
Head = node;
Count++;
}
public void AddLast(CustomLinkedListNode <T> node)
{
Tail.Next = node;
node.Previous = Tail;
Tail = node;
Count++;
}
public void Insert(int index, T value)
{
var newNode = new CustomLinkedListNode <T>(value);
var current = Head;
int counter = 0;
if (!ReferenceEquals(Head, current))
{
while (counter < index)
{
current = current.Next;
counter++;
}
current.Previous.Next = newNode;
newNode.Next = current;
newNode.Previous = current.Previous;
current.Previous = newNode;
Count++;
}
else
{
current.Previous = newNode;
newNode.Next = current;
Head = newNode;
Count++;
}
}
private void Initialize(T value)
{
var item = new CustomLinkedListNode <T>(value);
Head = item;
Tail = item;
Count = 1;
}
public void AddBefore(CustomLinkedListNode <T> node, CustomLinkedListNode <T> newNode)
{
node.Previous.Next = newNode;
newNode.Previous = node.Previous;
newNode.Next = node;
node.Previous = newNode;
Count++;
}
public void AddAfter(CustomLinkedListNode <T> node, CustomLinkedListNode <T> newNode)
{
node.Next.Previous = newNode;
newNode.Next = node.Next;
newNode.Previous = node;
node.Next = newNode;
Count++;
}
public CustomLinkedListNode <T> AddAfter(CustomLinkedListNode <T> node, T value)
{
var newNode = new CustomLinkedListNode <T>(value);
node.Next.Previous = newNode;
newNode.Next = node.Next;
newNode.Previous = node;
node.Next = newNode;
Count++;
return(newNode);
}
public CustomLinkedListNode <T> AddBefore(CustomLinkedListNode <T> node, T value)
{
var newNode = new CustomLinkedListNode <T>(value)
{
Previous = node.Previous
};
node.Previous.Next = newNode;
newNode.Next = node;
node.Previous = newNode;
Count++;
return(newNode);
}
public void Add(T data)
{
if (Tail != null)
{
var item = new CustomLinkedListNode <T>(data);
Tail.Next = item;
item.Previous = Tail;
Tail = item;
Count++;
}
else
{
Initialize(data);
}
}
public void Remove(CustomLinkedListNode <T> node)
{
if (ReferenceEquals(node, Head))
{
RemoveFirst();
return;
}
if (ReferenceEquals(node, Tail))
{
RemoveLast();
return;
}
node.Previous.Next = node.Next;
node.Next.Previous = node.Previous;
node.Next = null;
node.Previous = null;
Count--;
}
