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133 lines
3.1 KiB
133 lines
3.1 KiB
/*
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* tree.c
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*
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* Created by Yigit Colakoglu on 07/06/2021.
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* Copyright yigit@yigitcolakoglu.com. 2021. All rights reserved.
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*/
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#include "tree.h"
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#include "linkedlist.h"
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#include "urlparse.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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extern TreeNode *root;
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TreeNode *addtree(TreeNode *parent, TreeNode *p) {
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if (parent == NULL)
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return p;
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int strdiff = strcmp(parent->path, p->path);
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if (!strdiff) {
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while (p->params != NULL) {
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if (p->params == NULL ||
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linkedlistfind(parent->params, p->params->data) == -1) {
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p->params = linkedlistadd(parent->params, p->params->data);
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}
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p->params = p->params->next;
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}
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} else if (strdiff < 0) {
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parent->left = addtree(parent->left, p);
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parent->left->parent = parent;
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} else {
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parent->right = addtree(parent->right, p);
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parent->right->parent = parent;
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}
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return parent;
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}
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void rotatetreeleft(TreeNode *p) {
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TreeNode *r = p->right;
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p->right = r->left;
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if (p->right)
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p->right->parent = p;
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r->parent = p->parent;
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if (p->parent == NULL)
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root = r;
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else if (p->parent->left == p)
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p->parent->left = r;
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else
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p->parent->right = r;
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r->left = p;
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p->parent = r;
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}
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void rotatetreeright(TreeNode *p) {
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TreeNode *l = p->left;
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p->left = l->right;
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if (p->left)
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p->left->parent = p;
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l->parent = p->parent;
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if (p->parent == NULL)
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root = l;
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else if (p->parent->left == p)
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p->parent->left = l;
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else
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p->parent->right = l;
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l->right = p;
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p->parent = l;
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}
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void balancetree(TreeNode *root, TreeNode *node) {
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TreeNode *p = NULL;
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TreeNode *gP = NULL;
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while (node->parent != NULL && node->parent->parent != NULL && node->red && node->parent->red ) {
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p = node->parent;
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gP = node->parent->parent;
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if (gP->left == p) {
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if (gP->right != NULL && gP->right->red) {
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gP->red = 1;
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gP->left->red = 0;
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gP->right->red = 0;
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node = gP;
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}else{
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if(p->right == node){
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rotatetreeleft(p);
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node = p;
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p = node->parent;
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}else{
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rotatetreeright(gP);
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int c = p->red;
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p->red = gP->red;
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gP->red = c;
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node = p;
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}
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}
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} else {
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if(gP->left != NULL && gP->left->red){
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gP->red = 1;
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gP->left->red = 0;
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gP->right->red = 0;
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node = gP;
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}else{
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if(p->left == node){
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rotatetreeright(p);
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node = p;
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p = node->parent;
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}else{
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rotatetreeleft(gP);
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int c = p->red;
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p->red = gP->red;
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gP->red = c;
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node = p;
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}
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}
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}
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}
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root->red = 0;
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}
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TreeNode *treealloc(void) { return (TreeNode *)malloc(sizeof(TreeNode)); }
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void printtree(TreeNode *root, FILE *out, char *payload, int minparams) {
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if (root != NULL) {
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printtree(root->left, out, payload, minparams);
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if(root->nparams >= minparams){
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fprintf(out, "%s?", root->path);
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linkedlistprint(root->params, out, payload);
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fprintf(out, "%c", '\n');
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}
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printtree(root->right, out, payload, minparams);
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}
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}
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