internal static RBUIntNode LowerNode(RBTree tree, uint key)
{
RBUIntNode lowParent = null;
RBUIntNode current = (RBUIntNode)tree.root;
while (current != null)
{
if (key < current.key)
{
current = (RBUIntNode)current.left;
}
else if (key > current.key)
{
lowParent = current;
current = (RBUIntNode)current.right;
}
else
{
break;
}
}
// we finished walk on a node with key equal to ours
if (current != null && current.left != null)
{
return((RBUIntNode)current.left.LastNode());
}
return(lowParent);
}
private void SplitIfTooLarge(XFastTrie <RBTree> .LeafNode separator)
{
if (separator.value.Count <= upperLimit)
{
return;
}
RBTree newTree = SplitNew(ref separator.value);
cluster.Add(((RBUIntNode)newTree.LastNode()).key, newTree);
}
private bool MergeSplit(ref RBTree higher, ref RBTree lower)
{
RBTree.Node[] array = new RBTree.Node[higher.Count + lower.Count];
lower.CopySorted(array, 0);
higher.CopySorted(array, lower.Count);
if (array.Length > upperLimit)
{
lower = RBUtils.FromSortedList(array, 0, array.Length >> 1);
higher = RBUtils.FromSortedList(array, (array.Length >> 1) + 1, array.Length - 1);
return(true);
}
else
{
higher = RBUtils.FromSortedList(array, 0, array.Length - 1);
return(false);
}
}
internal static RBTree FromSortedList(RBTree.Node[] list, int start, int stop)
{
RBTree tree = new RBTree(new RBUIntNodeHelper());
int length = stop - start + 1;
if (start == stop)
{
return(tree);
}
int maxDepth = BitHacks.Power2MSB(BitHacks.RoundToPower((uint)(length + 1))) - 1;
tree.root = list[start + (length >> 1)];
tree.root.IsBlack = true;
tree.root.Size = (uint)length;
RBInsertChildren(tree.root, true, 1, maxDepth, list, start, start + (length >> 1) - 1);
RBInsertChildren(tree.root, false, 1, maxDepth, list, start + (length >> 1) + 1, stop);
return(tree);
}
private void AddChecked(uint key, T value, bool overwrite)
{
var separator = Separator(key);
if (separator == null)
{
// add first element
RBTree newTree = new RBTree(Node.Helper);
newTree.root = new RBUIntNode(key, value)
{
IsBlack = true
};
cluster.Add(BitHacks.MaxValue(cluster.width), newTree);
return;
}
RBUIntNode newNode = new RBUIntNode(key, value);
RBUIntNode interned = (RBUIntNode)separator.value.Intern(key, newNode);
if (interned != newNode)
{
if (overwrite)
{
interned.value = value;
}
else
{
throw new ArgumentException();
}
}
else
{
count++;
version++;
}
SplitIfTooLarge(separator);
}
public static RBTree.Node FirstNode(this RBTree tree)
{
return(FirstNode(tree.root));
}
public static RBTree.Node[] ToSortedArray(this RBTree tree)
{
RBTree.Node[] array = new RBTree.Node[tree.Count];
CopySorted(tree, array, 0);
return(array);
}
public static void CopySorted(this RBTree tree, RBTree.Node[] array, int offset)
{
InOrderAdd(tree.root, array, offset);
}
public static RBTree.Node LastNode(this RBTree tree)
{
return(LastNode(tree.root));
}
// removes new RBTree from the old tree
internal static RBTree SplitNew(ref RBTree tree)
{
RBTree.Node[] nodes = tree.ToSortedArray();
tree = RBUtils.FromSortedList(nodes, (nodes.Length >> 1), nodes.Length - 1);
return(RBUtils.FromSortedList(nodes, 0, (nodes.Length >> 1) - 1));
}
public Node(uint key, T value)
{
tree = new RBTree(Helper);
tree.Intern(key, new RBUIntNode(key, value));
}
public void Dispose()
{
tree = null;
pennants = null;
}
internal NodeEnumerator(RBTree tree, Stack <Node> init_pennants)
: this(tree)
{
this.init_pennants = init_pennants;
}
internal NodeEnumerator(RBTree tree)
: this()
{
this.tree = tree;
version = tree.version;
}
