InternalNode* InternalNode::insert(int value)
{
// students must write this
updateMinimums();
sort();
//updateMinimums();
//cout << "Starting InternalNode insert: " << value << endl;
//search keys for position to insert, count - 1 because elements start at 0
int searchKey = count-1;
for(int i = count-1; keys[searchKey] > value && i > 0; i--){
//cout << keys[searchKey] << " > " << value << endl;
searchKey--;
}
BTreeNode* leafSplit = children[searchKey]->insert(value);
updateMinimums();
sort();
//updateMinimums();
//for(int i = 6; i >= 0; i--)
// cout << "Keys[" << i << "]: " << keys[i] << endl;
if(!leafSplit){
//cout << "no leaf split" << endl;
return NULL;
}
if(leafSplit && count < internalSize){
//add here
//cout << "InternalNode Insert Here" << endl;
//cout << "InternalNode leafSplit has min: " << leafSplit->getMinimum() << endl;
keys[count] = leafSplit->getMinimum();
children[count] = leafSplit;
count++;
updateMinimums();
sort();
//updateMinimums();
return NULL;
}
else if(leftSibling && leftSibling->getCount() < internalSize){
//addToLeft(internalSplit)
//cout << "NEED TO SHARE TO LEFT" << endl;
// cout << "Adding to left internal" << endl;
((InternalNode*)leftSibling)->insert(children[0]);
((InternalNode*)leftSibling)->updateMinimums();
((InternalNode*)leftSibling)->sort();
//((InternalNode*)leftSibling)->updateMinimums();
count--;
for(int i = 0; i < count; i++)
{
children[i] = children[i + 1];
keys[i] = keys[i + 1];
}
children[count] = leafSplit;
keys[count] = leafSplit->getMinimum();
count++;
updateMinimums();
sort();
//updateMinimums();
//cout << "leafSplit min: " << leafSplit->getMinimum() << endl;
leafSplit->setParent(this);
if(parent)
parent->findMin(this);
return NULL;
}
else if(rightSibling && rightSibling->getCount() < internalSize){
//addtoRight
if(keys[count-1] > leafSplit->getMinimum()){
//cout << "Internal Passing to right: " << keys[count-1] << endl;
((InternalNode*) rightSibling)->insert(children[count-1]);
((InternalNode*) rightSibling)->updateMinimums();
((InternalNode*) rightSibling)->sort();
children[count-1] = leafSplit;
updateMinimums();
sort();
if(((InternalNode*) rightSibling)->parent){
(((InternalNode*) rightSibling)->parent)->updateMinimums();
(((InternalNode*) rightSibling)->parent)->sort();
}
}
return NULL;
}
else if(leafSplit){
//cout << "Internal Split" << endl;
InternalNode* newRight = new InternalNode(internalSize, leafSize, parent, this, rightSibling);
BTreeNode* oldRight = getRightSibling();
if(rightSibling){
oldRight->setLeftSibling(newRight);
newRight->setRightSibling(oldRight);
newRight->setLeftSibling(this);
}
rightSibling = newRight;
int rightCount;
for(int i = (internalSize+1) / 2; i < internalSize; i++){
//cout << "i: " << i << endl;
//cout << "rightCount: " << newRight->getCount() << endl;
//cout << "passing " << keys[i] << endl;
//cout << "value: " << value << endl;
rightCount = newRight->getCount();
newRight->children[rightCount] = children[i];
newRight->keys[rightCount] = keys[i];
newRight->count++;
children[i]->setParent(newRight);
count--;
}
//pass the leafSplit
if(leafSplit->getMinimum() > keys[((internalSize+1)/2)-1]){
//cout << leafSplit->getMinimum() << " > " << keys[(((internalSize+1)/2)-1)] << endl;
//cout << "Passing: " << leafSplit->getMinimum() << endl;
newRight->children[newRight->count] = leafSplit;
newRight->count++;
leafSplit->setParent(newRight);
}
//pass the value directly left of keys internalsize+1/2-1...
else{
//cout << "Passing: " << keys[(((internalSize+1)/2)-1)] << endl;
newRight->children[newRight->count] = children[(((internalSize+1)/2)-1)];
newRight->keys[newRight->count] = keys[(((internalSize+1)/2)-1)];
count--;
newRight->count++;
children[(((internalSize+1)/2)-1)] = leafSplit;
keys[(((internalSize+1)/2)-1)] = leafSplit->getMinimum();
count++;
}
updateMinimums();
sort();
//sort();
//updateMinimums();
//newRight->sort();
//newRight->updateMinimums();
//cout << "newRight ->count : " << newRight->count << endl;
//cout << "newRight keys 0 and 1: " << newRight->keys[0] << " " << newRight->keys[1] << endl;
newRight->updateMinimums();
newRight->sort();
//cout << "newRight keys 0 and 1: " << newRight->keys[0] << " " << newRight->keys[1] << endl;
//newRight->updateMinimums();
return newRight;
//split
return NULL; //need to split here
}
return NULL; // to avoid warnings for now.
} // InternalNode::insert()
