| Index: resources/inspector/splaytree.js
|
| ===================================================================
|
| --- resources/inspector/splaytree.js (revision 33840)
|
| +++ resources/inspector/splaytree.js (working copy)
|
| @@ -1,322 +0,0 @@
|
| -// Copyright 2009 the V8 project authors. All rights reserved.
|
| -// Redistribution and use in source and binary forms, with or without
|
| -// modification, are permitted provided that the following conditions are
|
| -// met:
|
| -//
|
| -// * Redistributions of source code must retain the above copyright
|
| -// notice, this list of conditions and the following disclaimer.
|
| -// * Redistributions in binary form must reproduce the above
|
| -// copyright notice, this list of conditions and the following
|
| -// disclaimer in the documentation and/or other materials provided
|
| -// with the distribution.
|
| -// * Neither the name of Google Inc. nor the names of its
|
| -// contributors may be used to endorse or promote products derived
|
| -// from this software without specific prior written permission.
|
| -//
|
| -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
| -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
| -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
| -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
| -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
| -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
| -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
| -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
| -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
| -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
| -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
| -
|
| -
|
| -// A namespace stub. It will become more clear how to declare it properly
|
| -// during integration of this script into Dev Tools.
|
| -var goog = goog || {};
|
| -goog.structs = goog.structs || {};
|
| -
|
| -
|
| -/**
|
| - * Constructs a Splay tree. A splay tree is a self-balancing binary
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| - * search tree with the additional property that recently accessed
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| - * elements are quick to access again. It performs basic operations
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| - * such as insertion, look-up and removal in O(log(n)) amortized time.
|
| - *
|
| - * @constructor
|
| - */
|
| -goog.structs.SplayTree = function() {
|
| -};
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| -
|
| -
|
| -/**
|
| - * Pointer to the root node of the tree.
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| - *
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| - * @type {goog.structs.SplayTree.Node}
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| - * @private
|
| - */
|
| -goog.structs.SplayTree.prototype.root_ = null;
|
| -
|
| -
|
| -/**
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| - * @return {boolean} Whether the tree is empty.
|
| - */
|
| -goog.structs.SplayTree.prototype.isEmpty = function() {
|
| - return !this.root_;
|
| -};
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| -
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| -
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| -
|
| -/**
|
| - * Inserts a node into the tree with the specified key and value if
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| - * the tree does not already contain a node with the specified key. If
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| - * the value is inserted, it becomes the root of the tree.
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| - *
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| - * @param {number} key Key to insert into the tree.
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| - * @param {*} value Value to insert into the tree.
|
| - */
|
| -goog.structs.SplayTree.prototype.insert = function(key, value) {
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| - if (this.isEmpty()) {
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| - this.root_ = new goog.structs.SplayTree.Node(key, value);
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| - return;
|
| - }
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| - // Splay on the key to move the last node on the search path for
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| - // the key to the root of the tree.
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| - this.splay_(key);
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| - if (this.root_.key == key) {
|
| - return;
|
| - }
|
| - var node = new goog.structs.SplayTree.Node(key, value);
|
| - if (key > this.root_.key) {
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| - node.left = this.root_;
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| - node.right = this.root_.right;
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| - this.root_.right = null;
|
| - } else {
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| - node.right = this.root_;
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| - node.left = this.root_.left;
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| - this.root_.left = null;
|
| - }
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| - this.root_ = node;
|
| -};
|
| -
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| -
|
| -/**
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| - * Removes a node with the specified key from the tree if the tree
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| - * contains a node with this key. The removed node is returned. If the
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| - * key is not found, an exception is thrown.
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| - *
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| - * @param {number} key Key to find and remove from the tree.
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| - * @return {goog.structs.SplayTree.Node} The removed node.
|
| - */
|
| -goog.structs.SplayTree.prototype.remove = function(key) {
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| - if (this.isEmpty()) {
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| - throw Error('Key not found: ' + key);
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| - }
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| - this.splay_(key);
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| - if (this.root_.key != key) {
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| - throw Error('Key not found: ' + key);
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| - }
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| - var removed = this.root_;
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| - if (!this.root_.left) {
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| - this.root_ = this.root_.right;
|
| - } else {
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| - var right = this.root_.right;
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| - this.root_ = this.root_.left;
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| - // Splay to make sure that the new root has an empty right child.
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| - this.splay_(key);
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| - // Insert the original right child as the right child of the new
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| - // root.
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| - this.root_.right = right;
|
| - }
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| - return removed;
|
| -};
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| -
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| -
|
| -/**
|
| - * Returns the node having the specified key or null if the tree doesn't contain
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| - * a node with the specified key.
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| - *
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| - * @param {number} key Key to find in the tree.
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| - * @return {goog.structs.SplayTree.Node} Node having the specified key.
|
| - */
|
| -goog.structs.SplayTree.prototype.find = function(key) {
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| - if (this.isEmpty()) {
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| - return null;
|
| - }
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| - this.splay_(key);
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| - return this.root_.key == key ? this.root_ : null;
|
| -};
|
| -
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| -
|
| -/**
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| - * @return {goog.structs.SplayTree.Node} Node having the minimum key value.
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| - */
|
| -goog.structs.SplayTree.prototype.findMin = function() {
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| - if (this.isEmpty()) {
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| - return null;
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| - }
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| - var current = this.root_;
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| - while (current.left) {
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| - current = current.left;
|
| - }
|
| - return current;
|
| -};
|
| -
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| -
|
| -/**
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| - * @return {goog.structs.SplayTree.Node} Node having the maximum key value.
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| - */
|
| -goog.structs.SplayTree.prototype.findMax = function(opt_startNode) {
|
| - if (this.isEmpty()) {
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| - return null;
|
| - }
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| - var current = opt_startNode || this.root_;
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| - while (current.right) {
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| - current = current.right;
|
| - }
|
| - return current;
|
| -};
|
| -
|
| -
|
| -/**
|
| - * @return {goog.structs.SplayTree.Node} Node having the maximum key value that
|
| - * is less or equal to the specified key value.
|
| - */
|
| -goog.structs.SplayTree.prototype.findGreatestLessThan = function(key) {
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| - if (this.isEmpty()) {
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| - return null;
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| - }
|
| - // Splay on the key to move the node with the given key or the last
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| - // node on the search path to the top of the tree.
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| - this.splay_(key);
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| - // Now the result is either the root node or the greatest node in
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| - // the left subtree.
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| - if (this.root_.key <= key) {
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| - return this.root_;
|
| - } else if (this.root_.left) {
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| - return this.findMax(this.root_.left);
|
| - } else {
|
| - return null;
|
| - }
|
| -};
|
| -
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| -
|
| -/**
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| - * @return {Array<*>} An array containing all the values of tree's nodes.
|
| - */
|
| -goog.structs.SplayTree.prototype.exportValues = function() {
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| - var result = [];
|
| - this.traverse_(function(node) { result.push(node.value); });
|
| - return result;
|
| -};
|
| -
|
| -
|
| -/**
|
| - * Perform the splay operation for the given key. Moves the node with
|
| - * the given key to the top of the tree. If no node has the given
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| - * key, the last node on the search path is moved to the top of the
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| - * tree. This is the simplified top-down splaying algorithm from:
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| - * "Self-adjusting Binary Search Trees" by Sleator and Tarjan
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| - *
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| - * @param {number} key Key to splay the tree on.
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| - * @private
|
| - */
|
| -goog.structs.SplayTree.prototype.splay_ = function(key) {
|
| - if (this.isEmpty()) {
|
| - return;
|
| - }
|
| - // Create a dummy node. The use of the dummy node is a bit
|
| - // counter-intuitive: The right child of the dummy node will hold
|
| - // the L tree of the algorithm. The left child of the dummy node
|
| - // will hold the R tree of the algorithm. Using a dummy node, left
|
| - // and right will always be nodes and we avoid special cases.
|
| - var dummy, left, right;
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| - dummy = left = right = new goog.structs.SplayTree.Node(null, null);
|
| - var current = this.root_;
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| - while (true) {
|
| - if (key < current.key) {
|
| - if (!current.left) {
|
| - break;
|
| - }
|
| - if (key < current.left.key) {
|
| - // Rotate right.
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| - var tmp = current.left;
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| - current.left = tmp.right;
|
| - tmp.right = current;
|
| - current = tmp;
|
| - if (!current.left) {
|
| - break;
|
| - }
|
| - }
|
| - // Link right.
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| - right.left = current;
|
| - right = current;
|
| - current = current.left;
|
| - } else if (key > current.key) {
|
| - if (!current.right) {
|
| - break;
|
| - }
|
| - if (key > current.right.key) {
|
| - // Rotate left.
|
| - var tmp = current.right;
|
| - current.right = tmp.left;
|
| - tmp.left = current;
|
| - current = tmp;
|
| - if (!current.right) {
|
| - break;
|
| - }
|
| - }
|
| - // Link left.
|
| - left.right = current;
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| - left = current;
|
| - current = current.right;
|
| - } else {
|
| - break;
|
| - }
|
| - }
|
| - // Assemble.
|
| - left.right = current.left;
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| - right.left = current.right;
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| - current.left = dummy.right;
|
| - current.right = dummy.left;
|
| - this.root_ = current;
|
| -};
|
| -
|
| -
|
| -/**
|
| - * Performs a preorder traversal of the tree.
|
| - *
|
| - * @param {function(goog.structs.SplayTree.Node)} f Visitor function.
|
| - * @private
|
| - */
|
| -goog.structs.SplayTree.prototype.traverse_ = function(f) {
|
| - var nodesToVisit = [this.root_];
|
| - while (nodesToVisit.length > 0) {
|
| - var node = nodesToVisit.shift();
|
| - if (node == null) {
|
| - continue;
|
| - }
|
| - f(node);
|
| - nodesToVisit.push(node.left);
|
| - nodesToVisit.push(node.right);
|
| - }
|
| -};
|
| -
|
| -
|
| -/**
|
| - * Constructs a Splay tree node.
|
| - *
|
| - * @param {number} key Key.
|
| - * @param {*} value Value.
|
| - */
|
| -goog.structs.SplayTree.Node = function(key, value) {
|
| - this.key = key;
|
| - this.value = value;
|
| -};
|
| -
|
| -
|
| -/**
|
| - * @type {goog.structs.SplayTree.Node}
|
| - */
|
| -goog.structs.SplayTree.Node.prototype.left = null;
|
| -
|
| -
|
| -/**
|
| - * @type {goog.structs.SplayTree.Node}
|
| - */
|
| -goog.structs.SplayTree.Node.prototype.right = null;
|
|
|