add

APP_Framework/Applications/app_test/test_rbtree/rbtree.c

@@ -0,0 +1,623 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "rbtree.h"
+
+#define rb_parent(r)   ((r)->parent)
+#define rb_color(r) ((r)->color)
+#define rb_is_red(r)   ((r)->color==RED)
+#define rb_is_black(r)  ((r)->color==BLACK)
+#define rb_set_black(r)  do { (r)->color = BLACK; } while (0)
+#define rb_set_red(r)  do { (r)->color = RED; } while (0)
+#define rb_set_parent(r,p)  do { (r)->parent = (p); } while (0)
+#define rb_set_color(r,c)  do { (r)->color = (c); } while (0)
+
+/*
+ * 创建红黑树
+ */
+RBRoot* create_rbtree()
+{
+    RBRoot *root = (RBRoot *)malloc(sizeof(RBRoot));
+    root->node = NULL;
+
+    return root;
+}
+
+/*
+ * 前序遍历
+ */
+static void preorder(RBTree tree)
+{
+    if(tree != NULL)
+    {
+        printf("%d ", tree->key);
+        preorder(tree->left);
+        preorder(tree->right);
+    }
+}
+void preorder_rbtree(RBRoot *root)
+{
+    if (root)
+        preorder(root->node);
+}
+
+/*
+ * 中序遍历
+ */
+static void inorder(RBTree tree)
+{
+    if(tree != NULL)
+    {
+        inorder(tree->left);
+        printf("%d ", tree->key);
+        inorder(tree->right);
+    }
+}
+
+void inorder_rbtree(RBRoot *root)
+{
+    if (root)
+        inorder(root->node);
+}
+
+/*
+ * 后序遍历
+ */
+static void postorder(RBTree tree)
+{
+    if(tree != NULL)
+    {
+        postorder(tree->left);
+        postorder(tree->right);
+        printf("%d ", tree->key);
+    }
+}
+
+void postorder_rbtree(RBRoot *root)
+{
+    if (root)
+        postorder(root->node);
+}
+
+/*
+ * 递归查找键值为key的节点
+ */
+static Node* search(RBTree x, Type key)
+{
+    if (x==NULL || x->key==key)
+        return x;
+
+    if (key < x->key)
+        return search(x->left, key);
+    else
+        return search(x->right, key);
+}
+int rbtree_search(RBRoot *root, Type key)
+{
+    if (root)
+        return search(root->node, key)? 0 : -1;
+}
+
+/*
+ * 非递归查找键值为key的节点
+ */
+static Node* iterative_search(RBTree x, Type key)
+{
+    while ((x!=NULL) && (x->key!=key))
+    {
+        if (key < x->key)
+            x = x->left;
+        else
+            x = x->right;
+    }
+
+    return x;
+}
+int iterative_rbtree_search(RBRoot *root, Type key)
+{
+    if (root)
+        return iterative_search(root->node, key) ? 0 : -1;
+}
+
+/*
+ * 返回tree为根结点的红黑树的最小结点。
+ */
+static Node* minimum(RBTree tree)
+{
+    if (tree == NULL)
+        return NULL;
+
+    while(tree->left != NULL)
+        tree = tree->left;
+    return tree;
+}
+
+int rbtree_minimum(RBRoot *root, int *val)
+{
+    Node *node;
+
+    if (root)
+        node = minimum(root->node);
+
+    if (node == NULL)
+        return -1;
+
+    *val = node->key;
+    return 0;
+}
+
+/*
+ * 返回tree为根结点的红黑树的最大结点。
+ */
+static Node* maximum(RBTree tree)
+{
+    if (tree == NULL)
+        return NULL;
+
+    while(tree->right != NULL)
+        tree = tree->right;
+    return tree;
+}
+
+int rbtree_maximum(RBRoot *root, int *val)
+{
+    Node *node;
+
+    if (root)
+        node = maximum(root->node);
+
+    if (node == NULL)
+        return -1;
+
+    *val = node->key;
+    return 0;
+}
+
+/*
+ * 找结点(x)的后继结点
+ */
+static Node* rbtree_successor(RBTree x)
+{
+    if (x->right != NULL)
+        return minimum(x->right);
+    Node* y = x->parent;
+    while ((y!=NULL) && (x==y->right))
+    {
+        x = y;
+        y = y->parent;
+    }
+
+    return y;
+}
+
+/*
+ * 找结点(x)的前驱结点
+ */
+static Node* rbtree_predecessor(RBTree x)
+{
+    if (x->left != NULL)
+        return maximum(x->left);
+    Node* y = x->parent;
+    while ((y!=NULL) && (x==y->left))
+    {
+        x = y;
+        y = y->parent;
+    }
+
+    return y;
+}
+
+/*
+ * 对红黑树的节点(x)进行左旋转
+ */
+static void rbtree_left_rotate(RBRoot *root, Node *x)
+{
+    Node *y = x->right;
+    x->right = y->left;
+    if (y->left != NULL)
+        y->left->parent = x;
+    y->parent = x->parent;
+
+    if (x->parent == NULL)
+    {
+        root->node = y; 
+    }
+    else
+    {
+        if (x->parent->left == x)
+            x->parent->left = y; 
+        else
+            x->parent->right = y; 
+    }
+
+    y->left = x;
+    x->parent = y;
+}
+
+/*
+ * 对红黑树的节点(y)进行右旋转
+ */
+static void rbtree_right_rotate(RBRoot *root, Node *y)
+{
+    Node *x = y->left;
+    y->left = x->right;
+    if (x->right != NULL)
+        x->right->parent = y;
+    x->parent = y->parent;
+
+    if (y->parent == NULL)
+    {
+        root->node = x;
+    }
+    else
+    {
+        if (y == y->parent->right)
+            y->parent->right = x; 
+        else
+            y->parent->left = x; 
+    }
+    x->right = y;
+    y->parent = x;
+}
+
+/*
+ * 红黑树插入修正函数
+ */
+static void rbtree_insert_fixup(RBRoot *root, Node *node)
+{
+    Node *parent, *gparent;
+
+    // 若“父节点存在，并且父节点的颜色是红色”
+    while ((parent = rb_parent(node)) && rb_is_red(parent))
+    {
+        gparent = rb_parent(parent);
+
+        //若“父节点”是“祖父节点的左孩子”
+        if (parent == gparent->left)
+        {
+            // Case 1条件：叔叔节点是红色
+            {
+                Node *uncle = gparent->right;
+                if (uncle && rb_is_red(uncle))
+                {
+                    rb_set_black(uncle);
+                    rb_set_black(parent);
+                    rb_set_red(gparent);
+                    node = gparent;
+                    continue;
+                }
+            }
+
+            // Case 2条件：叔叔是黑色，且当前节点是右孩子
+            if (parent->right == node)
+            {
+                Node *tmp;
+                rbtree_left_rotate(root, parent);
+                tmp = parent;
+                parent = node;
+                node = tmp;
+            }
+
+            // Case 3条件：叔叔是黑色，且当前节点是左孩子。
+            rb_set_black(parent);
+            rb_set_red(gparent);
+            rbtree_right_rotate(root, gparent);
+        }
+        else//若“z的父节点”是“z的祖父节点的右孩子”
+        {
+            // Case 1条件：叔叔节点是红色
+            {
+                Node *uncle = gparent->left;
+                if (uncle && rb_is_red(uncle))
+                {
+                    rb_set_black(uncle);
+                    rb_set_black(parent);
+                    rb_set_red(gparent);
+                    node = gparent;
+                    continue;
+                }
+            }
+
+            // Case 2条件：叔叔是黑色，且当前节点是左孩子
+            if (parent->left == node)
+            {
+                Node *tmp;
+                rbtree_right_rotate(root, parent);
+                tmp = parent;
+                parent = node;
+                node = tmp;
+            }
+
+            // Case 3条件：叔叔是黑色，且当前节点是右孩子。
+            rb_set_black(parent);
+            rb_set_red(gparent);
+            rbtree_left_rotate(root, gparent);
+        }
+    }
+
+    // 将根节点设为黑色
+    rb_set_black(root->node);
+}
+
+/*
+ * 添加节点
+ */
+static void rbtree_insert(RBRoot *root, Node *node)
+{
+    Node *y = NULL;
+    Node *x = root->node;
+    while (x != NULL)
+    {
+        y = x;
+        if (node->key < x->key)
+            x = x->left;
+        else
+            x = x->right;
+    }
+    rb_parent(node) = y;
+
+    if (y != NULL)
+    {
+        if (node->key < y->key)
+            y->left = node;     
+        else
+            y->right = node;     
+    }
+    else
+    {
+        root->node = node;         
+    }
+    node->color = RED;
+    rbtree_insert_fixup(root, node);
+}
+
+/*
+ * 创建结点
+ */
+static Node* create_rbtree_node(Type key, Node *parent, Node *left, Node* right)
+{
+    Node* p;
+
+    if ((p = (Node *)malloc(sizeof(Node))) == NULL)
+        return NULL;
+    p->key = key;
+    p->left = left;
+    p->right = right;
+    p->parent = parent;
+    p->color = BLACK; // 默认为黑色
+
+    return p;
+}
+
+/*
+ * 新建结点(节点键值为key)，并将其插入到红黑树中
+ */
+int insert_rbtree(RBRoot *root, Type key)
+{
+    Node *node;
+    if (search(root->node, key) != NULL)
+        return -1;
+    if ((node=create_rbtree_node(key, NULL, NULL, NULL)) == NULL)
+        return -1;
+
+    rbtree_insert(root, node);
+
+    return 0;
+}
+
+/*
+ * 红黑树删除修正函数
+ */
+static void rbtree_delete_fixup(RBRoot *root, Node *node, Node *parent)
+{
+    Node *other;
+
+    while ((!node || rb_is_black(node)) && node != root->node)
+    {
+        if (parent->left == node)
+        {
+            other = parent->right;
+            if (rb_is_red(other))
+            {
+                rb_set_black(other);
+                rb_set_red(parent);
+                rbtree_left_rotate(root, parent);
+                other = parent->right;
+            }
+            if ((!other->left || rb_is_black(other->left)) &&
+                (!other->right || rb_is_black(other->right)))
+            {
+                rb_set_red(other);
+                node = parent;
+                parent = rb_parent(node);
+            }
+            else
+            {
+                if (!other->right || rb_is_black(other->right))
+                {
+                    rb_set_black(other->left);
+                    rb_set_red(other);
+                    rbtree_right_rotate(root, other);
+                    other = parent->right;
+                }
+                rb_set_color(other, rb_color(parent));
+                rb_set_black(parent);
+                rb_set_black(other->right);
+                rbtree_left_rotate(root, parent);
+                node = root->node;
+                break;
+            }
+        }
+        else
+        {
+            other = parent->left;
+            if (rb_is_red(other))
+            {
+                rb_set_black(other);
+                rb_set_red(parent);
+                rbtree_right_rotate(root, parent);
+                other = parent->left;
+            }
+            if ((!other->left || rb_is_black(other->left)) &&
+                (!other->right || rb_is_black(other->right)))
+            {
+                rb_set_red(other);
+                node = parent;
+                parent = rb_parent(node);
+            }
+            else
+            {
+                if (!other->left || rb_is_black(other->left))
+                {
+                    // Case 3: x的兄弟w是黑色的，并且w的左孩子是红色，右孩子为黑色。
+                    rb_set_black(other->right);
+                    rb_set_red(other);
+                    rbtree_left_rotate(root, other);
+                    other = parent->left;
+                }
+                // Case 4: x的兄弟w是黑色的；并且w的右孩子是红色的，左孩子任意颜色。
+                rb_set_color(other, rb_color(parent));
+                rb_set_black(parent);
+                rb_set_black(other->left);
+                rbtree_right_rotate(root, parent);
+                node = root->node;
+                break;
+            }
+        }
+    }
+    if (node)
+        rb_set_black(node);
+}
+
+/*
+ * 删除结点
+ */
+void rbtree_delete(RBRoot *root, Node *node)
+{
+    Node *child, *parent;
+    int color;
+    if ( (node->left!=NULL) && (node->right!=NULL) )
+    {
+        Node *replace = node;
+        replace = replace->right;
+        while (replace->left != NULL)
+            replace = replace->left;
+        if (rb_parent(node))
+        {
+            if (rb_parent(node)->left == node)
+                rb_parent(node)->left = replace;
+            else
+                rb_parent(node)->right = replace;
+        }
+        else
+            root->node = replace;
+        child = replace->right;
+        parent = rb_parent(replace);
+        color = rb_color(replace);
+        if (parent == node)
+        {
+            parent = replace;
+        }
+        else
+        {
+            if (child)
+                rb_set_parent(child, parent);
+            parent->left = child;
+
+            replace->right = node->right;
+            rb_set_parent(node->right, replace);
+        }
+
+        replace->parent = node->parent;
+        replace->color = node->color;
+        replace->left = node->left;
+        node->left->parent = replace;
+
+        if (color == BLACK)
+            rbtree_delete_fixup(root, child, parent);
+        free(node);
+
+        return ;
+    }
+
+    if (node->left !=NULL)
+        child = node->left;
+    else
+        child = node->right;
+
+    parent = node->parent;
+    color = node->color;
+
+    if (child)
+        child->parent = parent;
+    if (parent)
+    {
+        if (parent->left == node)
+            parent->left = child;
+        else
+            parent->right = child;
+    }
+    else
+        root->node = child;
+
+    if (color == BLACK)
+        rbtree_delete_fixup(root, child, parent);
+    free(node);
+}
+
+/*
+ * 删除键值为key的结点
+ */
+void delete_rbtree(RBRoot *root, Type key)
+{
+    Node *z, *node;
+
+    if ((z = search(root->node, key)) != NULL)
+        rbtree_delete(root, z);
+}
+
+/*
+ * 销毁红黑树
+ */
+static void rbtree_destroy(RBTree tree)
+{
+    if (tree==NULL)
+        return ;
+
+    if (tree->left != NULL)
+        rbtree_destroy(tree->left);
+    if (tree->right != NULL)
+        rbtree_destroy(tree->right);
+
+    free(tree);
+}
+
+void destroy_rbtree(RBRoot *root)
+{
+    if (root != NULL)
+        rbtree_destroy(root->node);
+
+    free(root);
+}
+
+/*
+ * 打印"红黑树"
+ */
+static void rbtree_print(RBTree tree, Type key, int direction)
+{
+    if(tree != NULL)
+    {
+        if(direction==0)    // tree是根节点
+            printf("%2d(B) is root\n", tree->key);
+        else                // tree是分支节点
+            printf("%2d(%s) is %2d's %6s child\n", tree->key, rb_is_red(tree)?"R":"B", key, direction==1?"right" : "left");
+
+        rbtree_print(tree->left, tree->key, -1);
+        rbtree_print(tree->right,tree->key,  1);
+    }
+}
+
+void print_rbtree(RBRoot *root)
+{
+    if (root!=NULL && root->node!=NULL)
+        rbtree_print(root->node, root->node->key, 0);
+}

APP_Framework/Applications/app_test/test_rbtree/rbtree.h

@@ -0,0 +1,56 @@
+#ifndef _RED_BLACK_TREE_H_
+#define _RED_BLACK_TREE_H_
+
+#define RED        0    // 红色节点
+#define BLACK    1    // 黑色节点
+
+typedef int Type;
+
+// 红黑树的节点
+typedef struct RBTreeNode{
+    unsigned char color;        // 颜色(RED 或 BLACK)
+    Type   key;                    // 关键字(键值)
+    struct RBTreeNode *left;    // 左孩子
+    struct RBTreeNode *right;    // 右孩子
+    struct RBTreeNode *parent;    // 父结点
+}Node, *RBTree;
+
+// 红黑树的根
+typedef struct rb_root{
+    Node *node;
+}RBRoot;
+
+// 创建红黑树，返回"红黑树的根"！
+RBRoot* create_rbtree();
+
+// 销毁红黑树
+void destroy_rbtree(RBRoot *root);
+
+// 将结点插入到红黑树中。插入成功，返回0；失败返回-1。
+int insert_rbtree(RBRoot *root, Type key);
+
+// 删除结点(key为节点的值)
+void delete_rbtree(RBRoot *root, Type key);
+
+
+// 前序遍历"红黑树"
+void preorder_rbtree(RBRoot *root);
+// 中序遍历"红黑树"
+void inorder_rbtree(RBRoot *root);
+// 后序遍历"红黑树"
+void postorder_rbtree(RBRoot *root);
+
+// (递归实现)查找"红黑树"中键值为key的节点。找到的话，返回0；否则，返回-1。
+int rbtree_search(RBRoot *root, Type key);
+// (非递归实现)查找"红黑树"中键值为key的节点。找到的话，返回0；否则，返回-1。
+int iterative_rbtree_search(RBRoot *root, Type key);
+
+// 返回最小结点的值(将值保存到val中)。找到的话，返回0；否则返回-1。
+int rbtree_minimum(RBRoot *root, int *val);
+// 返回最大结点的值(将值保存到val中)。找到的话，返回0；否则返回-1。
+int rbtree_maximum(RBRoot *root, int *val);
+
+// 打印红黑树
+void print_rbtree(RBRoot *root);
+
+#endif

APP_Framework/Applications/app_test/test_rbtree/test_rbtree.c

@@ -1,341 +1,64 @@
-/*
-* Copyright (c) 2023 AIIT XUOS Lab
-* XiUOS is licensed under Mulan PSL v2.
-* You can use this software according to the terms and conditions of the Mulan PSL v2.
-* You may obtain a copy of Mulan PSL v2 at:
-*        http://license.coscl.org.cn/MulanPSL2
-* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
-* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
-* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
-* See the Mulan PSL v2 for more details.
-*/
+#include <stdio.h>
+#include "rbtree.h"
+#include "rbtree.c"
 
-/**
-* @file:    test_rbtree.c
-* @brief:   a application of red-black tree function
-* @version: 1.0
-* @author:  AIIT XUOS Lab
-* @date:    2023/6/23
-*/
-#include<string.h>
-#include <transform.h>
-#include"test_rbtree.h"
-#ifdef ADD_XIZI_FEATURES
+#define IF_INSERT 1    // "插入节点"flag
+#define IF_DELETE 1    // "删除节点"flag
+#define LENGTH(a) ( (sizeof(a)) / (sizeof(a[0])) )
 
-void RBTreeTraversal(RBTreeType *tree, RBNodeType *node) 
+void main()
 {
-	if (node != tree->leaf) {
-		RBTreeTraversal(tree, node->left_child);
-		printf("key:%d, color:%s\n", node->key, (node->is_red ? "Red" : "Black"));
-		RBTreeTraversal(tree, node->right_child);
-	}
-}
+    int a[] = {10, 150, 70, 0, 190, 270, 20, 50, 80};
+    int i, ilen=LENGTH(a);
+    RBRoot *root=NULL;
 
-RBNodeType* RBTreeSearch(RBTreeType *tree, int key)
-{
-    RBNodeType* current_node = tree->root;
-    while (current_node != tree->leaf){
-        if (key < current_node->key)
-            current_node = current_node->left_child;
-        else if (key > current_node->key)
-            current_node = current_node->right_child;
-        else
-            return current_node;
+    root = create_rbtree();
+    printf("red black tree 原始数据: ");
+    for(i=0; i<ilen; i++)
+        printf("%d ", a[i]);
+    printf("\n");
+
+    for(i=0; i<ilen; i++)
+    {
+        insert_rbtree(root, a[i]);
+        #if IF_INSERT
+                printf("添加节点: %d\n", a[i]);
+                printf("树的结构信息: \n");
+                print_rbtree(root);
+                printf("\n");
+        #endif
     }
 
-    return tree->leaf;
-}
+    if (rbtree_minimum(root, &i)==0)
+        printf("最小值: %d\n", i);
+    if (rbtree_maximum(root, &i)==0)
+        printf("最大值: %d\n", i);
+    printf("树的结构信息: \n");
 
-void RBTreeLeftRotate(RBTreeType *tree, RBNodeType *current_node)
-{
-    RBNodeType* child_node = current_node->right_child;
+    printf("== 前序遍历: ");
+    preorder_rbtree(root);
 
-    current_node->right_child = child_node->left_child;
-    if (child_node->left_child != tree->leaf)
-        child_node->left_child->parent = current_node;
+    printf("\n== 中序遍历: ");
+    inorder_rbtree(root);
 
-    child_node->parent = current_node->parent;
-    if (current_node->parent == tree->leaf)
-        tree->root = child_node;
-    else if (current_node == current_node->parent->left_child)
-        current_node->parent->left_child = child_node;
-    else
-        current_node->parent->right_child = child_node;
-    
-    child_node->left_child = current_node;
-    current_node->parent = child_node;
-}
+    printf("\n== 后序遍历: ");
+    postorder_rbtree(root);
+    printf("\n");
 
-void RBTreeRightRotate(RBTreeType *tree, RBNodeType* current_node)
-{
-    RBNodeType* child_node = current_node->left_child;
+    #if IF_DELETE
+        for(i=0; i<ilen; i++)
+        {
+            delete_rbtree(root, a[i]);
 
-    current_node->left_child = child_node->right_child;
-    if (child_node->right_child != tree->leaf)
-        child_node->right_child->parent = current_node;
-
-    child_node->parent = current_node->parent;
-    if (current_node->parent == tree->leaf)
-        tree->root = child_node;
-    else if (current_node == current_node->parent->right_child)
-        current_node->parent->right_child = child_node;
-    else
-        current_node->parent->left_child = child_node;
-    
-    child_node->right_child = current_node;
-    current_node->parent = child_node;
-}
-
-void InsertFixup(RBTreeType *tree, RBNodeType* current_node)
-{
-    while (current_node->parent->is_red){
-        /* The parent of current_node is the left subtree of the grandfather */
-        if (current_node->parent == current_node->parent->parent->left_child){
-            RBNodeType * uncle_node = current_node->parent->parent->right_child;
-            if (uncle_node->is_red){    /* case1:red uncle and red parent, change color */
-                uncle_node->is_red = false;
-                current_node->parent->is_red = false;
-                current_node->parent->parent->is_red = true;
-
-                current_node = current_node->parent->parent;
-            }else{                      /* case2:black uncle and red parent, need rotation */
-                if (current_node->parent->right_child == current_node){
-                    current_node = current_node->parent;
-                    RBTreeLeftRotate(tree, current_node);
-                }
-
-                current_node->parent->is_red = false;
-                current_node->parent->parent->is_red = true;
-                RBTreeRightRotate(tree, current_node->parent->parent);
-            }
-        /* The parent of current_node is the right subtree of the grandfather, same with left subtree */
-        }else{
-            RBNodeType * uncle_node = current_node->parent->parent->left_child;
-            if (uncle_node->is_red){
-                uncle_node->is_red = false;
-                current_node->parent->is_red = false;
-                current_node->parent->parent->is_red = true;
-
-                current_node = current_node->parent->parent;
-            }else{
-                if (current_node->parent->left_child == current_node){
-                    current_node = current_node->parent;
-                    RBTreeRightRotate(tree, current_node);
-                }
-
-                current_node->parent->is_red = false;
-                current_node->parent->parent->is_red = true;
-                RBTreeLeftRotate(tree, current_node->parent->parent);
+            printf("== 删除节点: %d\n", a[i]);
+            if (root)
+            {
+                printf("== 树的详细信息: \n");
+                print_rbtree(root);
+                printf("\n");
             }
         }
-    }
-    tree->root->is_red = false;
-}
+    #endif
 
-void RBTreeInsert(RBTreeType *tree, RBNodeType* new_node)
-{
-    RBNodeType* previous_node = tree->root;
-    RBNodeType* current_node = tree->root;
-
-    while (current_node != tree->leaf){
-        previous_node = current_node;
-        if (new_node->key > current_node->key)
-            current_node = current_node->right_child;
-        else if (new_node->key < current_node->key)
-            current_node = current_node->left_child;
-        else
-            return;
-    }
-
-    if (previous_node == tree->leaf){
-        tree->root = new_node;
-        tree->root->parent = tree->leaf;
-    }else{
-        new_node->parent = previous_node;
-
-        if (previous_node->key > new_node->key)
-            previous_node->left_child = new_node;
-        else
-            previous_node->right_child = new_node;
-    }
-
-    InsertFixup(tree, new_node);
-}
-
-RBNodeType* FindSuccessor(RBTreeType *tree, RBNodeType* current_node)
-{
-    RBNodeType* parent_node = current_node->parent;
-    if (current_node->right_child != tree->leaf){
-        current_node = current_node->right_child;
-        while (current_node->left_child != tree->leaf)
-            current_node = current_node->left_child;
-        return current_node;
-    }
-
-    while ((parent_node != tree->leaf) && (current_node == parent_node->right_child)){
-        current_node = parent_node;
-        parent_node = parent_node->parent;
-    }
-    return parent_node;
-}
-
-void DeleteFixup(RBTreeType *tree, RBNodeType* current_node)
-{
-    while ((current_node != tree->root) && (current_node->is_red == false)){
-        if (current_node == current_node->parent->left_child){
-            
-            RBNodeType* brother_node = current_node->parent->right_child;
-            if (brother_node->is_red){
-                brother_node->is_red = false;
-                current_node->parent->is_red = true;
-                RBTreeLeftRotate(tree, current_node->parent);
-                brother_node = current_node->parent->right_child;
-            }
-
-            if ((brother_node->left_child->is_red == false) && (brother_node->right_child->is_red == false)){
-                brother_node->is_red = true;
-                current_node = current_node->parent;
-            }else{
-                if (brother_node->right_child->is_red == false){
-                    brother_node->left_child->is_red = false;
-                    brother_node->is_red = true;
-                    RBTreeRightRotate(tree, brother_node);
-                    brother_node = current_node->parent->right_child;
-                }
-
-                brother_node->is_red = current_node->parent->is_red;
-                current_node->parent->is_red = false;
-                brother_node->right_child->is_red = false;
-                RBTreeLeftRotate(tree, current_node->parent);
-                current_node = tree->root;
-            }
-        }else{
-            RBNodeType* brother_node = current_node->parent->left_child;
-            if (brother_node->is_red){
-                brother_node->is_red = false;
-                current_node->parent->is_red = true;
-                RBTreeRightRotate(tree, current_node->parent);
-                brother_node = current_node->parent->left_child;
-            }
-
-            if ((brother_node->left_child->is_red == false) && (brother_node->right_child->is_red == false)){
-                brother_node->is_red = true;
-                current_node = current_node->parent;
-            }else{
-                if (brother_node->left_child->is_red == false){
-                    brother_node->right_child->is_red = false;
-                    brother_node->is_red = true;
-                    RBTreeLeftRotate(tree, brother_node);
-                    brother_node = current_node->parent->left_child;
-                }
-
-                brother_node->is_red = current_node->parent->is_red;
-                current_node->parent->is_red = false;
-                brother_node->left_child->is_red = false;
-                RBTreeRightRotate(tree, current_node->parent);
-                current_node = tree->root;
-            }
-        }
-    }
-    current_node->is_red = false;
-}
-
-void RBTreeDelete(RBTreeType *tree, RBNodeType* target_node)
-{
-    RBNodeType* delete_node = tree->leaf;
-    RBNodeType* replace_node = tree->leaf;
-
-    if ((target_node->left_child == tree->leaf) || (target_node->right_child == tree->leaf))
-        delete_node = target_node;
-    else
-        delete_node = FindSuccessor(tree, target_node);
-    
-    if (delete_node->left_child != tree->leaf) /* successor still has subtree */
-        replace_node = delete_node->left_child;
-    else if (delete_node->right_child != tree->leaf)
-        replace_node = delete_node->right_child;
-    
-    replace_node->parent = delete_node->parent;
-
-    if (delete_node->parent == tree->leaf) /* delete a root node */
-        tree->root = replace_node;
-    else if (delete_node == delete_node->parent->left_child)
-        delete_node->parent->left_child = replace_node;
-    else
-        delete_node->parent->right_child = replace_node;
-
-    if (delete_node != target_node)
-        target_node->key = delete_node->key;
-    
-    if (delete_node->is_red == false)
-        DeleteFixup(tree, replace_node);
-
-    free(delete_node);
-}
-
-
-void TestRBTree(void)
-{
-    int default_key[] = { 16, 25, 23, 5, 2, 6, 17, 37, 38, 98, 20, 19, 47, 49, 12, 21, 9, 18, 14, 15 };
-    int array_size = sizeof(default_key) / sizeof(default_key[0]);
-    
-    printf("Test Red Black Tree\n");
-    printf("default_key array: ");
-    for (int i = 0; i < array_size; i++)
-        printf("%d  ", default_key[i]);
-    printf("\n%d elements\n", array_size);
-
-	RBTreeType *tree = (RBTreeType *)malloc(sizeof(RBTreeType));
-	if (tree == NULL) {
-		printf("malloc failed\n");
-        return;
-	}
-
-	tree->leaf = (RBNodeType*)malloc(sizeof(RBNodeType));
-    tree->leaf->left_child = NULL;
-    tree->leaf->right_child = NULL;
-    tree->leaf->parent = NULL;
-    tree->leaf->is_red = false;
-    tree->leaf->key = -1;
-	tree->root = tree->leaf;
-
-	RBNodeType *node = tree->leaf;
-
-	for (int i = 0; i < array_size; i++) {
-		node = (RBNodeType*)malloc(sizeof(RBNodeType));
-        node->left_child = tree->leaf;
-        node->right_child = tree->leaf;
-        node->parent = NULL;
-        node->is_red = true;
-        node->key = default_key[i];
-		printf("insert key[%d]=%d\n",i,default_key[i]);
-		RBTreeInsert(tree, node);
-	}
-
-	printf("------------------Inorder Traversal------------------\n");
-	RBTreeTraversal(tree, tree->root);
-
-	for (int i = 0; i < array_size; i++) {
-		printf("search key = %d\n", default_key[i]);
-		node = RBTreeSearch(tree, default_key[i]);
-        printf("search succeeded, parent node: %d, left-child: %d, right-child: %d\n", node->parent->key, node->left_child->key, node->right_child->key);
-
-    	printf("delete key = %d\n", node->key);
-        RBTreeDelete(tree, node);
-		
-		printf("Show current tree?Y/N \n");
-        char ch;
-        scanf("%c", &ch);
-         if (ch == 'Y' || ch == 'y') {
-            printf("------------------Inorder Traversal Tree After Deletion------------------\n");
-            if (tree->root != tree->leaf)
-	            RBTreeTraversal(tree, tree->root);
-            else
-                printf("the tree is empty.\n");
-        }
-	}
-}
-
-PRIV_SHELL_CMD_FUNCTION(TestRBTree, a red-black tree test sample, PRIV_SHELL_CMD_MAIN_ATTR);
-
-#endif
+    destroy_rbtree(root);
+}

APP_Framework/Applications/app_test/test_rbtree/test_rbtree.h

@@ -1,60 +0,0 @@
-/*
-* Copyright (c) 2023 AIIT XUOS Lab
-* XiUOS is licensed under Mulan PSL v2.
-* You can use this software according to the terms and conditions of the Mulan PSL v2.
-* You may obtain a copy of Mulan PSL v2 at:
-*        http://license.coscl.org.cn/MulanPSL2
-* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
-* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
-* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
-* See the Mulan PSL v2 for more details.
-*/
-
-/**
-* @file:    test_rbtree.h
-* @brief:   a head file of red-black tree structure
-* @version: 1.0
-* @author:  AIIT XUOS Lab
-* @date:    2023/6/23
-*/
-#ifndef REDBLACKTREE_H_
-#define REDBLACKTREE_H_
-#include <stdbool.h>
-#include <stdio.h>
-
-typedef struct RedBlackNode
-{
-    int key;
-    struct RedBlackNode *left_child;
-    struct RedBlackNode *right_child;
-    struct RedBlackNode *parent;
-    bool is_red;
-} RBNodeType;
-
-typedef struct RedBlackTree
-{
-    RBNodeType *root;
-    RBNodeType *leaf;
-} RBTreeType;
-
-void TestRBTree(void);
-
-void RBTreeTraversal(RBTreeType *tree, RBNodeType *node);
-
-void RBTreeLeftRotate(RBTreeType *tree, RBNodeType *current_node);
-
-void RBTreeRightRotate(RBTreeType *tree, RBNodeType* current_node);
-
-void InsertFixup(RBTreeType *tree, RBNodeType* current_node);
-
-void RBTreeInsert(RBTreeType *tree, RBNodeType* new_node);
-
-void DeleteFixup(RBTreeType *tree, RBNodeType* current_node);
-
-void RBTreeDelete(RBTreeType *tree, RBNodeType* target_node);
-
-RBNodeType* FindSuccessor(RBTreeType *tree, RBNodeType* current_node);
-
-RBNodeType* RBTreeSearch(RBTreeType *tree, int key);
-
-#endif

APP_Framework/Applications/main.c

@@ -1,32 +1,32 @@
-/*
-* Copyright (c) 2020 AIIT XUOS Lab
-* XiUOS is licensed under Mulan PSL v2.
-* You can use this software according to the terms and conditions of the Mulan PSL v2.
-* You may obtain a copy of Mulan PSL v2 at:
-*        http://license.coscl.org.cn/MulanPSL2
-* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
-* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
-* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
-* See the Mulan PSL v2 for more details.
-*/
+// /*
+// * Copyright (c) 2020 AIIT XUOS Lab
+// * XiUOS is licensed under Mulan PSL v2.
+// * You can use this software according to the terms and conditions of the Mulan PSL v2.
+// * You may obtain a copy of Mulan PSL v2 at:
+// *        http://license.coscl.org.cn/MulanPSL2
+// * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+// * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+// * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+// * See the Mulan PSL v2 for more details.
+// */
 
-#include <stdio.h>
-#include <string.h>
-// #include <user_api.h>
-#include <transform.h>
+// #include <stdio.h>
+// #include <string.h>
+// // #include <user_api.h>
+// #include <transform.h>
 
 
-extern int FrameworkInit();
-extern void ApplicationOtaTaskInit(void);
-int main(void)
-{
-	printf("Hello, world! \n");
-	FrameworkInit();
-#ifdef APPLICATION_OTA
-	ApplicationOtaTaskInit();
-#endif
-    return 0;
-}
-// int cppmain(void);
+// extern int FrameworkInit();
+// extern void ApplicationOtaTaskInit(void);
+// int main(void)
+// {
+// 	printf("Hello, world! \n");
+// 	FrameworkInit();
+// #ifdef APPLICATION_OTA
+// 	ApplicationOtaTaskInit();
+// #endif
+//     return 0;
+// }
+// // int cppmain(void);