/// <summary>
/// Adds the item to the end of the linked list.
/// </summary>
/// <param name="newItem"></param>
internal void Add(PossibleSignature newItem)
{
if (Last != null)
{
AddAfter(Last, newItem);
}
else
{
First = newItem;
Last = newItem;
Count++;
}
}
internal void AddAfter(PossibleSignature existing, PossibleSignature newItem)
{
newItem.Next = existing.Next;
newItem.Previous = existing;
if (existing.Next != null)
{
existing.Next.Previous = newItem;
}
existing.Next = newItem;
if (existing == Last)
{
Last = newItem;
}
Count++;
}
internal void AddBefore(PossibleSignature existing, PossibleSignature newItem)
{
newItem.Next = existing;
newItem.Previous = existing.Previous;
if (existing.Previous != null)
{
existing.Previous.Next = newItem;
}
existing.Previous = newItem;
if (existing == First)
{
First = newItem;
}
Count++;
}
/// <summary>
/// Removes any reference to this element from the linked list.
/// </summary>
internal void Remove(PossibleSignature existing)
{
if (First == existing)
{
First = existing.Next;
}
if (Last == existing)
{
Last = existing.Previous;
}
if (existing.Previous != null)
{
existing.Previous.Next = existing.Next;
}
if (existing.Next != null)
{
existing.Next.Previous = existing.Previous;
}
Count--;
}
