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authorTSR Berry <20988865+TSRBerry@users.noreply.github.com>2023-04-08 01:22:00 +0200
committerMary <thog@protonmail.com>2023-04-27 23:51:14 +0200
commitcee712105850ac3385cd0091a923438167433f9f (patch)
tree4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs
parentcd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs')
-rw-r--r--Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs354
1 files changed, 0 insertions, 354 deletions
diff --git a/Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs b/Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs
deleted file mode 100644
index bcb2e2a2..00000000
--- a/Ryujinx.Common/Collections/IntrusiveRedBlackTreeImpl.cs
+++ /dev/null
@@ -1,354 +0,0 @@
-using System;
-
-namespace Ryujinx.Common.Collections
-{
- /// <summary>
- /// Tree that provides the ability for O(logN) lookups for keys that exist in the tree, and O(logN) lookups for keys immediately greater than or less than a specified key.
- /// </summary>
- /// <typeparam name="T">Derived node type</typeparam>
- public class IntrusiveRedBlackTreeImpl<T> where T : IntrusiveRedBlackTreeNode<T>
- {
- protected const bool Black = true;
- protected const bool Red = false;
- protected T Root = null;
-
- internal T RootNode => Root;
-
- /// <summary>
- /// Number of nodes on the tree.
- /// </summary>
- public int Count { get; protected set; }
-
- /// <summary>
- /// Removes all nodes on the tree.
- /// </summary>
- public void Clear()
- {
- Root = null;
- Count = 0;
- }
-
- /// <summary>
- /// Finds the node whose key is immediately greater than <paramref name="node"/>.
- /// </summary>
- /// <param name="node">Node to find the successor of</param>
- /// <returns>Successor of <paramref name="node"/></returns>
- internal static T SuccessorOf(T node)
- {
- if (node.Right != null)
- {
- return Minimum(node.Right);
- }
- T parent = node.Parent;
- while (parent != null && node == parent.Right)
- {
- node = parent;
- parent = parent.Parent;
- }
- return parent;
- }
-
- /// <summary>
- /// Finds the node whose key is immediately less than <paramref name="node"/>.
- /// </summary>
- /// <param name="node">Node to find the predecessor of</param>
- /// <returns>Predecessor of <paramref name="node"/></returns>
- internal static T PredecessorOf(T node)
- {
- if (node.Left != null)
- {
- return Maximum(node.Left);
- }
- T parent = node.Parent;
- while (parent != null && node == parent.Left)
- {
- node = parent;
- parent = parent.Parent;
- }
- return parent;
- }
-
- /// <summary>
- /// Returns the node with the largest key where <paramref name="node"/> is considered the root node.
- /// </summary>
- /// <param name="node">Root node</param>
- /// <returns>Node with the maximum key in the tree of <paramref name="node"/></returns>
- protected static T Maximum(T node)
- {
- T tmp = node;
- while (tmp.Right != null)
- {
- tmp = tmp.Right;
- }
-
- return tmp;
- }
-
- /// <summary>
- /// Returns the node with the smallest key where <paramref name="node"/> is considered the root node.
- /// </summary>
- /// <param name="node">Root node</param>
- /// <returns>Node with the minimum key in the tree of <paramref name="node"/></returns>
- /// <exception cref="ArgumentNullException"><paramref name="node"/> is null</exception>
- protected static T Minimum(T node)
- {
- ArgumentNullException.ThrowIfNull(node);
-
- T tmp = node;
- while (tmp.Left != null)
- {
- tmp = tmp.Left;
- }
-
- return tmp;
- }
-
- protected void RestoreBalanceAfterRemoval(T balanceNode)
- {
- T ptr = balanceNode;
-
- while (ptr != Root && ColorOf(ptr) == Black)
- {
- if (ptr == LeftOf(ParentOf(ptr)))
- {
- T sibling = RightOf(ParentOf(ptr));
-
- if (ColorOf(sibling) == Red)
- {
- SetColor(sibling, Black);
- SetColor(ParentOf(ptr), Red);
- RotateLeft(ParentOf(ptr));
- sibling = RightOf(ParentOf(ptr));
- }
- if (ColorOf(LeftOf(sibling)) == Black && ColorOf(RightOf(sibling)) == Black)
- {
- SetColor(sibling, Red);
- ptr = ParentOf(ptr);
- }
- else
- {
- if (ColorOf(RightOf(sibling)) == Black)
- {
- SetColor(LeftOf(sibling), Black);
- SetColor(sibling, Red);
- RotateRight(sibling);
- sibling = RightOf(ParentOf(ptr));
- }
- SetColor(sibling, ColorOf(ParentOf(ptr)));
- SetColor(ParentOf(ptr), Black);
- SetColor(RightOf(sibling), Black);
- RotateLeft(ParentOf(ptr));
- ptr = Root;
- }
- }
- else
- {
- T sibling = LeftOf(ParentOf(ptr));
-
- if (ColorOf(sibling) == Red)
- {
- SetColor(sibling, Black);
- SetColor(ParentOf(ptr), Red);
- RotateRight(ParentOf(ptr));
- sibling = LeftOf(ParentOf(ptr));
- }
- if (ColorOf(RightOf(sibling)) == Black && ColorOf(LeftOf(sibling)) == Black)
- {
- SetColor(sibling, Red);
- ptr = ParentOf(ptr);
- }
- else
- {
- if (ColorOf(LeftOf(sibling)) == Black)
- {
- SetColor(RightOf(sibling), Black);
- SetColor(sibling, Red);
- RotateLeft(sibling);
- sibling = LeftOf(ParentOf(ptr));
- }
- SetColor(sibling, ColorOf(ParentOf(ptr)));
- SetColor(ParentOf(ptr), Black);
- SetColor(LeftOf(sibling), Black);
- RotateRight(ParentOf(ptr));
- ptr = Root;
- }
- }
- }
- SetColor(ptr, Black);
- }
-
- protected void RestoreBalanceAfterInsertion(T balanceNode)
- {
- SetColor(balanceNode, Red);
- while (balanceNode != null && balanceNode != Root && ColorOf(ParentOf(balanceNode)) == Red)
- {
- if (ParentOf(balanceNode) == LeftOf(ParentOf(ParentOf(balanceNode))))
- {
- T sibling = RightOf(ParentOf(ParentOf(balanceNode)));
-
- if (ColorOf(sibling) == Red)
- {
- SetColor(ParentOf(balanceNode), Black);
- SetColor(sibling, Black);
- SetColor(ParentOf(ParentOf(balanceNode)), Red);
- balanceNode = ParentOf(ParentOf(balanceNode));
- }
- else
- {
- if (balanceNode == RightOf(ParentOf(balanceNode)))
- {
- balanceNode = ParentOf(balanceNode);
- RotateLeft(balanceNode);
- }
- SetColor(ParentOf(balanceNode), Black);
- SetColor(ParentOf(ParentOf(balanceNode)), Red);
- RotateRight(ParentOf(ParentOf(balanceNode)));
- }
- }
- else
- {
- T sibling = LeftOf(ParentOf(ParentOf(balanceNode)));
-
- if (ColorOf(sibling) == Red)
- {
- SetColor(ParentOf(balanceNode), Black);
- SetColor(sibling, Black);
- SetColor(ParentOf(ParentOf(balanceNode)), Red);
- balanceNode = ParentOf(ParentOf(balanceNode));
- }
- else
- {
- if (balanceNode == LeftOf(ParentOf(balanceNode)))
- {
- balanceNode = ParentOf(balanceNode);
- RotateRight(balanceNode);
- }
- SetColor(ParentOf(balanceNode), Black);
- SetColor(ParentOf(ParentOf(balanceNode)), Red);
- RotateLeft(ParentOf(ParentOf(balanceNode)));
- }
- }
- }
- SetColor(Root, Black);
- }
-
- protected virtual void RotateLeft(T node)
- {
- if (node != null)
- {
- T right = RightOf(node);
- node.Right = LeftOf(right);
- if (node.Right != null)
- {
- node.Right.Parent = node;
- }
- T nodeParent = ParentOf(node);
- right.Parent = nodeParent;
- if (nodeParent == null)
- {
- Root = right;
- }
- else if (node == LeftOf(nodeParent))
- {
- nodeParent.Left = right;
- }
- else
- {
- nodeParent.Right = right;
- }
- right.Left = node;
- node.Parent = right;
- }
- }
-
- protected virtual void RotateRight(T node)
- {
- if (node != null)
- {
- T left = LeftOf(node);
- node.Left = RightOf(left);
- if (node.Left != null)
- {
- node.Left.Parent = node;
- }
- T nodeParent = ParentOf(node);
- left.Parent = nodeParent;
- if (nodeParent == null)
- {
- Root = left;
- }
- else if (node == RightOf(nodeParent))
- {
- nodeParent.Right = left;
- }
- else
- {
- nodeParent.Left = left;
- }
- left.Right = node;
- node.Parent = left;
- }
- }
-
- #region Safety-Methods
-
- // These methods save memory by allowing us to forego sentinel nil nodes, as well as serve as protection against NullReferenceExceptions.
-
- /// <summary>
- /// Returns the color of <paramref name="node"/>, or Black if it is null.
- /// </summary>
- /// <param name="node">Node</param>
- /// <returns>The boolean color of <paramref name="node"/>, or black if null</returns>
- protected static bool ColorOf(T node)
- {
- return node == null || node.Color;
- }
-
- /// <summary>
- /// Sets the color of <paramref name="node"/> node to <paramref name="color"/>.
- /// <br></br>
- /// This method does nothing if <paramref name="node"/> is null.
- /// </summary>
- /// <param name="node">Node to set the color of</param>
- /// <param name="color">Color (Boolean)</param>
- protected static void SetColor(T node, bool color)
- {
- if (node != null)
- {
- node.Color = color;
- }
- }
-
- /// <summary>
- /// This method returns the left node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
- /// </summary>
- /// <param name="node">Node to retrieve the left child from</param>
- /// <returns>Left child of <paramref name="node"/></returns>
- protected static T LeftOf(T node)
- {
- return node?.Left;
- }
-
- /// <summary>
- /// This method returns the right node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
- /// </summary>
- /// <param name="node">Node to retrieve the right child from</param>
- /// <returns>Right child of <paramref name="node"/></returns>
- protected static T RightOf(T node)
- {
- return node?.Right;
- }
-
- /// <summary>
- /// Returns the parent node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
- /// </summary>
- /// <param name="node">Node to retrieve the parent from</param>
- /// <returns>Parent of <paramref name="node"/></returns>
- protected static T ParentOf(T node)
- {
- return node?.Parent;
- }
-
- #endregion
- }
-}