void DLR(struct tree * root)
{
if(!root)
return;
printf("%d ",root->data);
DLR(root->left);
DLR(root->right);
}
/*
bool insertAVL(int, int)
Adds a node to a tree in an attempt to create an AVL tree.
Rotations are implemented, but apparently, incorrectly.
Runtime: theta(n^3)
*/
bool AVLTree::insertAVL(int key, int value) {
//inc tree size by 1 if going to return true, else don't increment it
Node* newNode = new Node(key, value, NULL, NULL);
int arbitrary = 0;
if (!find(key, arbitrary)) {
if (root == NULL) {
size++;
root = newNode;
extra.push_back(*root);
return true;
}
else {
insertHelperAVL(root, key, value);
//Check if off balance
if (recursiveGetHeight(newNode->lc) - recursiveGetHeight(newNode->rc) >= 2) {
//If offbalance, rotate as needed
if (key <= root->lc->key) {
SLR(newNode);
}
else {
DLR(newNode);
}
}
//Check if off balance
if (recursiveGetHeight(newNode->lc) - recursiveGetHeight(newNode->rc) <= -2) {
//If offbalance, rotate as needed
if (key >= root->rc->key) {
SRR(newNode);
}
else {
DRR(newNode);
}
}
size++;
extra.push_back(*newNode);
return true;
}
}
//Failed to add the node
return false;
};
void Preorder(struct tree * root)
{
DLR(root);
}
void PreLL1() {
digType cflag = 0;
// Detect and eliminate left recursion
DLR();
#ifdef _DEBUG
printf("After deleting the left recursion: \n");
for (pRule p = gRules; p; p = p->next) {
for (pRuleNode pr = p->addr; pr; pr = pr->next) {
printf("%s ", pr->symbol);
}
printf("\n");
}
printf("\n\n\n");
#endif // _DEBUG
// Terminals First set
for (pSymbolNode p = ll[1]; p; p = p->next) {
getSymbolFirst(p);
}
// Nonterminals First set
while (1)
{
for (pSymbolNode p = ll[0]; p; p = p->next) {
getSymbolFirst(p);
}
if (cflag == setCount(getSymbolFirst)) break;
else cflag = setCount(getSymbolFirst);
}
#ifdef _DEBUG
printf("The First sets: \n");
for (pSymbolNode p = ll[0]; p; p = p->next) {
printf("%s: ", p->symbol);
if (p->first)
for (unsigned int i = 1; i <= *(p->first); i++) {
char *s = findSerial(*(p->first + i));
printf("%s ", s);
free(s);
}
printf("\n");
}
printf("\n\n\n");
#endif // _DEBUG
cflag = 0;
// Follow set
while (1)
{
for (pSymbolNode p = ll[0]; p; p = p->next) {
getFollow(p);
}
if (cflag == setCount(getFollow)) break;
else cflag = setCount(getFollow);
}
#ifdef _DEBUG
printf("The Follow sets: \n");
for (pSymbolNode p = ll[0]; p; p = p->next) {
printf("%s: ", p->symbol);
if (p->follow)
for (unsigned int i = 1; i <= *(p->follow); i++) {
char *s = findSerial(*(p->follow + i));
printf("%s ", s);
printf("(%d) ", *(p->follow + i));
free(s);
}
printf("\n");
}
printf("\n\n\n");
#endif // _DEBUG
// Construct LL(1) analysis table
CLAT();
#ifdef _DEBUG
printf("The Analysis table: \n\t");
for (digType i = 0; i < gTerSerial / 2; i++) {
if (!i)
printf("# ");
else {
char* s = findSerial(i * 2);
printf("%s ", s);
free(s);
}
}
printf("\n");
for (digType row = 0; row < gNonTerSerial / 2; row++) {
char* s = findSerial(row * 2 + 1);
printf("%s\t", s);
free(s);
for (digType col = 0; col < gTerSerial / 2; col++) {
if (!AT[row][col]) {
printf(". ");
continue;
}
s = findSerial(AT[row][col]->serial);
if (s)
printf("%s ", s);
else
printf("0 ");
free(s);
}
printf("\n");
}
printf("\n\n\n");
#endif // _DEBUG
}