/// <summary>
/// 构造函数
/// </summary>
public BsTree()
{
_mRoot = null;
_carUpdate = new Dictionary<int, int>();
_carIt = new Dictionary<int, int>();
_roadUpdate = new Dictionary<string, int>();
_roadIt = new Dictionary<string, int>();
carSpeed = new Dictionary<int, double>();
}
public BstNode Right; // 右孩子
#endregion Fields
#region Constructors
public BstNode(int value, int c, long la, int max, int blockcarnum, double blockspeed, int isblocked, BstNode p,
BstNode l, BstNode r,bool isfull)
{
Key = value;
CarNumbers = c;
LatestTime = la;
MaxCarNumbers = max;
blockCarNumbers = blockcarnum;
blockSpeed = blockspeed;
isBlocked = isblocked;
Parent = p;
Left = l;
Right = r;
isFull = isfull;
}
private BstNode Successor(BstNode x)
{
if (x.Right != null)
return Minimum(x.Right);
BstNode y = x.Parent;
while ((y != null) && (x == y.Right))
{
x = y;
y = y.Parent;
}
return y;
}
/// <summary>
/// (递归实现)查找"二叉树x"中latestTime为key的节点
/// </summary>
/// <param name="x"></param>
/// <returns></returns>
private BstNode SearchTime(BstNode x, long time)
{
if (x == null || x.LatestTime == time)
return SearchTime(x.Left, time);
if (x.LatestTime == time)
{
return x;
}
if (!(x == null || x.LatestTime == time))
{
return SearchTime(x.Right, time);
}
return x;
}
/// <summary>
/// (递归实现)查找"二叉树x"中键值为key的节点
/// </summary>
/// <param name="x"></param>
/// <param name="key"></param>
/// <returns></returns>
private BstNode Search(ref BstNode x, long key)
{
if (x == null || x.Key == key)
return x;
if (key < x.Key)
return Search(ref x.Left, key);
return Search(ref x.Right, key);
}
/// <summary>
/// 删除结点(z)，并返回被删除的结点
/// </summary>
/// <param name="tree"></param>
/// <param name="z"></param>
/// <returns></returns>
private void Remove(ref BstNode tree, BstNode z)
{
BstNode x;
BstNode y;
if ((z.Left == null) || (z.Right == null))
y = z;
else
y = Successor(z);
if (y.Left != null)
x = y.Left;
else
x = y.Right;
if (x != null)
x.Parent = y.Parent;
if (y.Parent == null)
tree = x;
else if (y == y.Parent.Left)
y.Parent.Left = x;
else
y.Parent.Right = x;
if (y != z)
z.Key = y.Key;
}
/// <summary>
/// 查找最小结点：返回tree为根结点的二叉树的最小结点
/// </summary>
/// <param name="tree"></param>
/// <returns></returns>
private BstNode Minimum(BstNode tree)
{
if (tree == null)
return null;
while (tree.Left != null)
{
tree = tree.Left;
}
return tree;
}
private long Maximum(BstNode tree)
{
if (tree == null)
return 0;
long oldTime = Math.Min(tree.LatestTime, Math.Max(Maximum(tree.Left), Maximum(tree.Right)));
return oldTime;
}
/// <summary>
/// 将结点(key为节点键值)插入到二叉树中
/// </summary>
/// <param name="key"></param>
private void Insert(int key,double speed)
{
long timeNow = ConvertDateTimeInt(DateTime.Now);
BstNode z = new BstNode(key, 1, timeNow, 0, 0, speed, 0, null, null, null,true);
Insert(ref _mRoot, z);
if (!_isFull)
{
if (AllLevel++ > MaxRoadNum)
{
_isFull = true;
}
}
}
/// <summary>
/// 将结点插入到二叉树中
/// </summary>
/// <param name="tree"></param>
/// <param name="z"></param>
private void Insert(ref BstNode tree, BstNode z)
{
BstNode x = tree;
BstNode y = null;
while (x != null)
{
y = x;
if (z.Key < x.Key)
x = x.Left;
else
x = x.Right;
}
z.Parent = y;
if (y == null)
tree = z;
else if (z.Key < y.Key)
y.Left = z;
else
y.Right = z;
}
/// <summary>
/// 销毁二叉树
/// </summary>
/// <param name="tree"></param>
private void Destroy(BstNode tree)
{
if (tree == null)
return;
if (tree.Left != null)
Destroy(tree.Left);
if (tree.Right != null)
Destroy(tree.Right);
}