public void Setafter(T after, T data)
{
if (Head != null)
{
var current = Head.Next;
while (current != null)
{
if (current.Data.Equals(after))
{
var item = new CircularLinkedListItem <T>(data);
current.Next.Previous = item;
item.Next = current.Next;
current.Next = item;
item.Previous = current;
Count++;
return;
}
current = current.Next;
}
}
else
{
SetHead(data);
}
}
public void Delete(T data)
{
if (Head != null)
{
var item = new CircularLinkedListItem <T>(data);
if (Head.Data.Equals(item.Data))
{
Head.Previous.Next = Head.Next;
Head.Next.Previous = Head.Previous;
Head = Head.Next;
Count--;
return;
}
var current = Head.Next;
var previous = Head;
while (current != null)
{
if (current.Data.Equals(item.Data))
{
previous.Next = current.Next;
current.Next.Previous = previous;
Count--;
return;
}
previous = current;
current = current.Next;
}
}
else
{
throw new ArgumentNullException("Linked list is empty!");
}
}
private void SetHead(T data)
{
var item = new CircularLinkedListItem <T>(data);
Head = item;
Head.Next = item;
Head.Previous = item;
Count = 1;
}
public void AddData(T data)
{
if (Head != null)
{
var item = new CircularLinkedListItem <T>(data);
var last = Head.Previous;
last.Next = item;
Head.Previous = item;
item.Next = Head;
item.Previous = last;
Count++;
return;
}
else
{
SetHead(data);
}
}