taskrambler  0.1.9
Web server and task management solution.
rotateRight.c
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1 /**
2  * \file
3  *
4  * \author Georg Hopp
5  *
6  * \copyright
7  * Copyright © 2012 Georg Hopp
8  *
9  * This program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation, either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program. If not, see <http://www.gnu.org/licenses/>.
21  */
22 
23 #include "tree.h"
24 
25 void
26 treeRotateRight(Tree * this, Tree node)
27 {
28  Tree leftChild = TREE_LEFT(node);
29  Tree lcRightSub = TREE_LEFT_RIGHT(node);
30 
31  leftChild->right = node;
32  leftChild->parent = TREE_PARENT(node);
33  node->left = lcRightSub;
34  if (NULL != lcRightSub) {
35  lcRightSub->parent = node;
36  }
37 
38  if (NULL != TREE_PARENT(node)) {
39  if (TREE_PARENT(node)->left == node) {
40  TREE_PARENT(node)->left = leftChild;
41  } else {
42  TREE_PARENT(node)->right = leftChild;
43  }
44  } else {
45  *this = leftChild;
46  }
47 
48  node->parent = leftChild;
49 }
50 
51 // vim: set ts=4 sw=4:
#define TREE_PARENT(node)
Definition: tree.h:30
#define TREE_LEFT_RIGHT(node)
Definition: tree.h:38
#define TREE_LEFT(node)
Definition: tree.h:29
void treeRotateRight(Tree *this, Tree node)
Definition: rotateRight.c:26