void LeafNode::removeKey(int keyIndex, int childIndex) {
for (int i = keyIndex; i < getKeyNum() - 1; ++i) {
setKeyValue(i, getKeyValue(i + 1));
setData(i, getData(i + 1));
}
setKeyNum(getKeyNum() - 1);
}
void CInternalNode::removeKey(int keyIndex, int childIndex)
{
for (int i=0; i<getKeyNum()-keyIndex-1; ++i)
{
setKeyValue(keyIndex+i, getKeyValue(keyIndex+i+1));
setChild(childIndex+i, getChild(childIndex+i+1));
}
setKeyNum(getKeyNum()-1);
}
/*删除内部结点的键值*/
void InternalNode::removeKey(int keyIndex, int childIndex) {
for (int i = 0; i < getKeyNum() - childIndex; i++)
{
setChild(childIndex + i, getChild(childIndex + i + 1));
}
for (int i = 0; i < getKeyNum() - keyIndex - 1; ++i) {
setKeyValue(keyIndex + i, getKeyValue(keyIndex + i + 1));
}//键值对依次向前移动
setKeyNum(getKeyNum() - 1);
}
/*插入叶子节点*/
void LeafNode::insert(KeyType key, const DataType &data) {
int i;
for (i = m_KeyNum; i >= 1 && m_KeyValues[i - 1] > key; --i) {
setKeyValue(i, m_KeyValues[i - 1]);
setData(i, m_Datas[i - 1]);
}
setKeyValue(i, key);
setData(i, data);
setKeyNum(m_KeyNum + 1);
}
/*分裂内部结点，此种情况发生在原先结点的keyNum=MAX_KEY下*/
void InternalNode::splitNode(FatherNode* parentNode, int childIndex) {
InternalNode* newNode = new InternalNode(); //分裂后的新结点
newNode->setKeyNum(MIN_KEY);
int i;
for (i = 0; i < MIN_KEY; ++i) {
newNode->setKeyValue(i, m_KeyValues[i + MIN_CHILD]);
} //向新结点中拷贝键值
for (i = 0; i < MIN_CHILD; ++i) {
newNode->setChild(i, m_Childs[i + MIN_CHILD]);
} //向新结点中拷贝指针
setKeyNum(MIN_KEY); //更新原先结点中的键值个数
((InternalNode*)parentNode)->insert(childIndex, childIndex + 1, m_KeyValues[MIN_KEY], newNode); //将新结点插入树中
}
/*插入内部结点*/
void InternalNode::insert(int keyIndex, int childIndex, KeyType key, FatherNode* childNode) {
int i;
for (i = getKeyNum(); i > keyIndex; --i) {
setChild(i + 1, m_Childs[i]);
setKeyValue(i, m_KeyValues[i - 1]);
} //将父节点的childIndex后所有键值对后移一个单位
if (i == childIndex) {
setChild(i + 1, m_Childs[i]);
}
setChild(childIndex, childNode); //插入新结点
setKeyValue(keyIndex, key);
setKeyNum(m_KeyNum + 1);
}
void CInternalNode::insert(int keyIndex, int childIndex, KeyType key, CNode* childNode) {
int i;
for (i=getKeyNum(); i>keyIndex; --i)//将父节点中的childIndex后的所有关键字的值和子树指针向后移一位
{
setChild(i+1,m_Childs[i]);
setKeyValue(i,m_KeyValues[i-1]);
}
if (i==childIndex)
{
setChild(i+1, m_Childs[i]);
}
setChild(childIndex, childNode);
setKeyValue(keyIndex, key);
setKeyNum(m_KeyNum+1);
}
void LeafNode::splitNode(FatherNode* parentNode, int childIndex) {
LeafNode* newNode = new LeafNode();
setKeyNum(MIN_LEAF);
newNode->setKeyNum(MIN_LEAF + 1);
newNode->setRightSibling(getRightSibling());
setRightSibling(newNode);
newNode->setLeftSibling(this);
int i;
for (i = 0; i < MIN_LEAF + 1; ++i) {
newNode->setKeyValue(i, m_KeyValues[i + MIN_LEAF]);
}
for (i = 0; i < MIN_LEAF + 1; ++i) {
newNode->setData(i, m_Datas[i + MIN_LEAF]);
}
((InternalNode*)parentNode)->insert(childIndex, childIndex + 1, m_KeyValues[MIN_LEAF], newNode);
}
void CInternalNode::split(CNode* parentNode, int childIndex)
{
CInternalNode* newNode = new CInternalNode();//分裂后的右节点
newNode->setKeyNum(MINNUM_KEY);
int i;
for (i=0; i<MINNUM_KEY; ++i)// 拷贝关键字的值
{
newNode->setKeyValue(i, m_KeyValues[i+MINNUM_CHILD]);
}
for (i=0; i<MINNUM_CHILD; ++i) // 拷贝孩子节点指针
{
newNode->setChild(i, m_Childs[i+MINNUM_CHILD]);
}
setKeyNum(MINNUM_KEY); //更新左子树的关键字个数
((CInternalNode*)parentNode)->insert(childIndex, childIndex+1, m_KeyValues[MINNUM_KEY], newNode);
}
void CLeafNode::split(CNode* parentNode, int childIndex)
{
CLeafNode* newNode = new CLeafNode();//分裂后的右节点
setKeyNum(MINNUM_LEAF);
newNode->setKeyNum(MINNUM_LEAF+1);
newNode->setRightSibling(getRightSibling());
setRightSibling(newNode);
newNode->setLeftSibling(this);
int i;
for (i=0; i<MINNUM_LEAF+1; ++i)// 拷贝关键字的值
{
newNode->setKeyValue(i, m_KeyValues[i+MINNUM_LEAF]);
}
for (i=0; i<MINNUM_LEAF+1; ++i)// 拷贝数据
{
newNode->setData(i, m_Datas[i+MINNUM_LEAF]);
}
((CInternalNode*)parentNode)->insert(childIndex, childIndex+1, m_KeyValues[MINNUM_LEAF], newNode);
}
FatherNode::~FatherNode() {
setKeyNum(0);
}
/*基本节点*/
FatherNode::FatherNode() {
setType(LEAF);
setKeyNum(0);
}
CNode::~CNode()
{
setKeyNum(0);
}
CNode::CNode()
{
setType(LEAF);
setKeyNum(0);
}
