/*Faz a insercao a direita na AVL*/
AVL insertRight(AVL p, void* info, int *cresceu,int tipo_AVL) {
p->right=insert(p->right, info, cresceu,tipo_AVL);
if(*cresceu) {
switch(p->bf) {
case LH:
p->bf=EH;
*cresceu=0;
break;
case EH:
p->bf=RH;
*cresceu=1;
break;
case RH:
p=balanceRight(p);
*cresceu=0;
}
}
return p;
}
Tree insertRight(Tree t, TreeEntry e, int *cresceu) {
t -> right = insertTree(t -> right, e, cresceu);
if(*cresceu) {
switch(t->bf) {
case LH:
t -> bf = EH;
*cresceu = 0;
break;
case EH:
t -> bf = RH;
*cresceu = 1;
break;
case RH:
t = balanceRight(t);
*cresceu = 0;
}
}
return t;
}
Tree deleteLeft(Tree t, TreeEntry e, int *diminuiu) {
t -> left = deleteTree(t -> left, e, diminuiu);
if(*diminuiu) {
switch(t->bf) {
case LH:
t -> bf = EH;
*diminuiu = 1;
break;
case EH:
t -> bf = RH;
*diminuiu = 0;
break;
case RH:
printf("[bR]\n");
t = balanceRight(t);
*diminuiu = 1;
}
}
return t;
}
avlTreeNode* insertNode(avlTreeNode* root , int key )
{
if( !root )
{
printf("\nIn leaf Insertion\n");
root = creatNode( key );
return root;
}
if( root -> data == key )
{
printf("\nDuplicate Key Not permitted\n");
return root;
}
else if( root -> data > key )
{
printf("\nBefore Left Insertion\n");
root -> leftTree = insertNode( root -> leftTree , key ) ;
printf("\nAfter Left Insertion\n");
int balanceDifference;
balanceDifference = calculateMaxHight( root );
switch (balanceDifference)
{
case -15:
{
printf("\nDon have left and right child\n");
root -> leftTree -> height = 1;
root -> leftTree -> balanceFactor = EQ;
break;
}
case 0:
{
printf("\nBoth equal hight subtrees\n");
root -> height = 1 + ( root-> leftTree -> height ) ;
root -> balanceFactor = EQ ;
break;
}
case 1:
{
/* printf("\nright subtree highted\n");*/
root -> height = 1 + (root -> leftTree -> height) ;
root -> balanceFactor = LH ;
break;
}
case 2:
{
printf("\nLeft subtree highted calling balanceLeft\n");
root = balanceLeft( root );
break;
}
}
return root;
}
else
{
printf("\nBefore Rightt Insertion\n");
root -> rightTree = insertNode( root -> rightTree , key ) ;
printf("\nAfter Right Insertion\n");
int balanceDifference;
balanceDifference = calculateMaxHight( root );
switch (balanceDifference)
{
case -15:
{
printf("\nDon have left and right child\n");
root -> rightTree -> height = 1;
root -> rightTree -> balanceFactor = EQ;
break;
}
case 0:
{
printf("\nBoth equal hight subtrees\n");
root -> height = 1 + ( root -> rightTree -> height ) ;
root -> balanceFactor = EQ ;
break;
}
case -2:
{
printf("\nRight highted, calling balanceRight\n");
root = balanceRight( root );
break;
}
case -1:
{
/* printf("\nLeft subtree hightedt\n");*/
root -> height = 1 + ( root -> rightTree -> height );
root -> balanceFactor = RH ;
break;
}
}
return root;
}
return root;
}
struct node * deleteNode(struct node * root, char * word, int * found)
{
int match;
struct node *p;
if (root == NULL)
{
return NULL;
}
else
{
match = strcmp(word, root->word);
}
/*If the word is found, found is set to true. If the frequency of the word is greated than 1, it is decreased by 1. Else, the node must be deleted. */
if(match == 0)
{
(*found) = 1;
if(root->frequency > 1)
{
root->frequency--;
}
else
{
/*If there is a right child, the tree must be balanced to maintain its integrity. The containing variable is set to the right child, unless the right child has a left child. The node to be deleted then swaps with the containing variable. A recursive call is then made with the right child. Afterwards the balanceRight function is called*/
if(root->right !=NULL)
{
p = root->right;
if(p->left != NULL)
{
p = p->left;
}
root->word = p->word;
root->frequency = p->frequency;
root->right = deleteNode(root->right, p->word, found);
if((height(root->left) - height(root->right)) == 2)
{
balanceRight(root, word);
}
}
else
{
return(root->left);
}
}
}
else
{
/*Recursive calls are made while the word isn't matched*/
if(match > 0)
{
root->right = deleteNode(root->right, word, found);
}
if(match < 0)
{
root->left = deleteNode(root->left, word, found);
}
}
root->height = height(root);
return root;
}