ListTemplates.h
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上传日期:2009-05-26
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- /*
- s_p_oneil@hotmail.com
- Copyright (c) 2000, Sean O'Neil
- All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- * Neither the name of this project nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef __ListTemplates_h__
- #define __ListTemplates_h__
- #include <fstream.h>
- template <class NODE, class INDEX> class CArray
- {
- protected:
- INDEX m_nElements; // The number of elements in the array
- INDEX m_nLockedElements; // The number of locked elements in the array
- unsigned char *m_pFlags; // An array of element status flags
- NODE *m_pBuffer; // The array of elements
- public:
- enum { Locked = 0x80, Dirty = 0x40 };
- // Constructor/destructor methods
- CArray(INDEX nElements=0)
- {
- m_nElements = 0;
- if(nElements)
- Init(nElements);
- }
- ~CArray() { Cleanup(); }
- // Init and Cleanup methods
- void Init(INDEX nElements)
- {
- Cleanup();
- m_nElements = nElements;
- m_nLockedElements = 0;
- m_pFlags = new unsigned char[m_nElements];
- memset(m_pFlags, 0, m_nElements);
- m_pBuffer = new NODE[m_nElements];
- }
- void Cleanup()
- {
- if(m_nElements)
- {
- delete []m_pBuffer;
- delete m_pFlags;
- m_nElements = 0;
- }
- }
- // Info methods
- INDEX GetElementCount() { return m_nElements; }
- INDEX GetElementSize() { return sizeof(NODE); }
- INDEX GetArraySize() { return GetElementCount() * GetElementSize(); }
- INDEX GetLockedElementCount() { return m_nLockedElements; }
- INDEX GetFreeElementCount() { return GetElementCount() - GetLockedElementCount(); }
- // Status flag methods
- unsigned char GetFlags(INDEX n) { return m_pFlags[n]; }
- void SetFlags(INDEX n, unsigned char nFlags) { m_pFlags[n] |= nFlags; }
- void ClearFlags(INDEX n, unsigned char nFlags) { m_pFlags[n] &= ~nFlags; }
- // Array manipulation methods
- NODE *GetBuffer() { return m_pBuffer; }
- NODE *operator[](INDEX n) { return &m_pBuffer[n]; }
- };
- template <class NODE, class INDEX> class CStackedArray : public CArray<NODE, INDEX>
- {
- protected:
- INDEX *m_pStack; // A stack of free element indices
- public:
- // Constructor/destructor methods
- CStackedArray(INDEX nElements=0)
- {
- m_nElements = 0;
- if(nElements)
- Init(nElements);
- }
- ~CStackedArray() { Cleanup(); }
- // Init and Cleanup methods
- void Init(INDEX nElements)
- {
- Cleanup();
- CArray<NODE, INDEX>::Init(nElements);
- m_pStack = new INDEX[m_nElements];
- for(INDEX i=0; i<m_nElements; i++)
- m_pStack[i] = i;
- }
- void Cleanup()
- {
- if(m_nElements)
- delete m_pStack;
- CArray<NODE, INDEX>::Cleanup();
- }
- // Array manipulation methods
- INDEX LockElement()
- {
- INDEX nElement = (INDEX)-1;
- if(m_nLockedElements < m_nElements)
- {
- nElement = m_pStack[m_nLockedElements++];
- m_pFlags[nElement] = Locked;
- }
- return nElement;
- }
- void UnlockElement(INDEX n)
- {
- m_pFlags[n] = 0;
- m_pStack[--m_nLockedElements] = n;
- }
- INDEX GetStackIndex(INDEX n) { return m_pStack[n]; }
- };
- template <class NODE, class INDEX> class CPackedArray : public CArray<NODE, INDEX>
- {
- protected:
- INDEX m_nLowestUnused; // The index of the lowest unused element in the array
- public:
- // Constructor/destructor methods
- CPackedArray(INDEX nElements=0)
- {
- m_nElements = 0;
- if(nElements)
- Init(nElements);
- }
- ~CPackedArray() { Cleanup(); }
- // Init and Cleanup methods
- void Init(INDEX nElements)
- {
- Cleanup();
- CArray<NODE, INDEX>::Init(nElements);
- m_nLowestUnused = 0;
- }
- void Cleanup()
- {
- }
- // Array manipulation methods
- INDEX LockElement()
- {
- INDEX nElement = (INDEX)-1;
- if(m_nLowestUnused < m_nElements)
- {
- nElement = m_nLowestUnused++;
- m_pFlags[nElement] |= Locked;
- m_nLockedElements++;
- while(m_nLowestUnused < m_nElements && (m_pFlags[m_nLowestUnused] & Locked))
- m_nLowestUnused++;
- }
- return nElement;
- }
- void UnlockElement(INDEX n)
- {
- m_pFlags[n] &= ~Locked;
- m_nLockedElements--;
- m_nLowestUnused = n < m_nLowestUnused ? n : m_nLowestUnused;
- }
- };
- /******************************************************************************
- * Class: CListNode
- *******************************************************************************
- * Deriving from this class turns your class into a node that can be used in a
- * doubly-linked list. It was designed to work with CLinkedList (defined below)
- * in such a way that objects can insert and remove themselves from the list.
- * It is only templatized so it can use pointers of your class's type to keep
- * you from having to cast all returned pointers.
- Example:
- #define CMyObjectList CLinkedList<CMyObject>
- class CMyObject : public CListNode<CMyObject> { ... };
- ******************************************************************************/
- template <class A> class CListNode
- {
- public:
- A *m_pNext; // Points to next item in the list
- A *m_pPrevious; // Points to previous item in the list
- public:
- // Constructors/destructors
- CListNode() { m_pNext = m_pPrevious = NULL; }
- ~CListNode() { Remove(); }
- static void InitList(CListNode<A> &nHead, CListNode<A> &nTail)
- {
- nHead.m_pNext = (A *)&nTail;
- nTail.m_pPrevious = (A *)&nHead;
- }
- // Members to get the next and previous pointers (must use Insert/Remove members to set them)
- A *GetNext() { return m_pNext; }
- A *GetPrevious() { return m_pPrevious; }
- // Functions for searching the list, override these functions to use
- DWORD GetID() { return 0; }
- const char *GetName() { return ""; }
- void Write(ostream &os) { os.write((char *)this, sizeof(A)); }
- bool Read(istream &is)
- {
- is.read((char *)this, sizeof(A));
- m_pNext = m_pPrevious = NULL;
- return (!is ? false : true);
- }
- // Members to insert into, remove from, and check status in a list
- bool IsInList() { return (m_pNext != NULL && m_pPrevious != NULL); }
- void InsertBefore(A *pNode)
- {
- if(pNode && !IsInList())
- {
- m_pNext = pNode;
- m_pPrevious = pNode->m_pPrevious;
- pNode->m_pPrevious->m_pNext = (A *)this;
- pNode->m_pPrevious = (A *)this;
- }
- }
- void InsertAfter(A *pNode)
- {
- if(pNode && !IsInList())
- {
- m_pPrevious = pNode;
- m_pNext = pNode->m_pNext;
- pNode->m_pNext->m_pPrevious = (A *)this;
- pNode->m_pNext = (A *)this;
- }
- }
- void Remove()
- {
- if(m_pPrevious)
- m_pPrevious->m_pNext = m_pNext;
- if(m_pNext)
- m_pNext->m_pPrevious = m_pPrevious;
- m_pNext = m_pPrevious = NULL;
- }
- // Members to find items in the list by ID, name, or index
- A *FindID(DWORD dwID)
- {
- for(A *pNode = (A *)this; pNode->IsInList(); pNode=pNode->GetNext())
- {
- if(dwID == pNode->GetID())
- return pNode;
- }
- return NULL;
- }
- A *FindName(const char *pszName)
- {
- for(A *pNode = (A *)this; pNode->IsInList(); pNode=pNode->GetNext())
- {
- if(stricmp(pszName, pNode->GetName()) == 0)
- return pNode;
- }
- return NULL;
- }
- A *FindIndex(int nIndex)
- {
- A *pNode = (A *)this;
- for(int i=0; pNode->IsInList() && i<nIndex; i++)
- pNode = pNode->GetNext();
- return pNode->IsInList() ? pNode : NULL;
- }
- };
- /*******************************************************************************
- * Class: CLinkedList
- ********************************************************************************
- * This class implements a doubly-linked list that allows the objects within it
- * to insert and remove themselves without access to the actual list (to insert,
- * a pointer to an item already in the list is needed). To accomplish this,
- * static head and tail nodes must be kept instead of pointers, and no count
- * variable can used (because the objects have no way to update them). The head
- * and tail nodes point to each other when the list is empty. See CListNode above
- * for more information.
- Important Note:
- The static head and tail nodes mark the end of the list, not NULL. Use
- CListNode::IsInList() to see when you've reached the end, like this:
- for(CObject *p = list.GetHead(); p->IsInList(); p = p->GetNext()) { ... }
- *******************************************************************************/
- template <class A> class CLinkedList
- {
- protected:
- CListNode<A> m_nHead; // Points to head item
- CListNode<A> m_nTail; // Points to tail item
- public:
- // Constructors/destructors
- CLinkedList() { CListNode<A>::InitList(m_nHead, m_nTail); }
- ~CLinkedList() { RemoveAll(); }
- // Members to get the head and tail items of the list
- A *GetHead() { return m_nHead.GetNext(); }
- A *GetTail() { return m_nTail.GetPrevious(); }
- // Members to add items to the list
- void AddHead(A *p) { p->InsertAfter((A *)&m_nHead); }
- void AddTail(A *p) { p->InsertBefore((A *)&m_nTail); }
- void InsertBefore(A *p, A *pNode) { p->InsertBefore(pNode); }
- void InsertAfter(A *p, A *pNode) { p->InsertAfter(pNode); }
- // Members to remove items from the list
- A *Remove(A *p) { p->Remove(); return p; }
- A *RemoveHead() { return Remove(GetHead()); }
- A *RemoveTail() { return Remove(GetTail()); }
- void RemoveAll() { while(GetHead()->IsInList()) delete GetHead(); }
- // Members to get the size of the list
- bool IsEmpty() { return !GetHead()->IsInList(); }
- int GetCount()
- {
- register A *pNode = GetHead();
- for(int i=0; pNode->IsInList(); i++)
- pNode = pNode->GetNext();
- return i;
- }
- // Members to find items in the list by ID, name, or index
- A *FindID(DWORD dwID, A *pNode=NULL)
- {
- if(!pNode)
- pNode = GetHead();
- return pNode->FindID(dwID);
- }
- A *FindName(const char *pszName, A *pNode=NULL)
- {
- if(!pNode)
- pNode = GetHead();
- return pNode->FindName(pszName);
- }
- A *FindIndex(int nIndex, A *pNode=NULL)
- {
- if(!pNode)
- pNode = GetHead();
- return pNode->FindIndex(nIndex);
- }
- bool Read(istream &is)
- {
- int n;
- is.read((char *)&n, sizeof(int));
- if(!is)
- return false;
- for(int i=0; i<n; i++)
- {
- A *pNode = new A;
- if(!pNode->Read(is))
- return false;
- AddTail(pNode);
- }
- return true;
- }
- void Write(ostream &os)
- {
- int n = GetCount();
- os.write((char *)&n, sizeof(int));
- for(A *pNode=GetHead(); pNode->IsInList(); pNode=pNode->GetNext())
- pNode->Write(os);
- }
- };
- /******************************************************************************
- * Class: CTreeNode
- *******************************************************************************
- * Deriving from this class turns your class into a node to use in a tree of the
- * specified order. It is templatized simply so it can use pointers of your
- * class's type, keeping you from havig to cast pointers you get back.
- * Example:
- * class CMyObject : public CTreeNode<CMyObject, 4> { ... };
- ******************************************************************************/
- template <class A, int nOrder> class CTreeNode
- {
- protected:
- A *m_pParent;
- A *m_pChild[nOrder];
- public:
- CTreeNode(A *pParent=NULL)
- {
- m_pParent = pParent;
- for(register int i=0; i<nOrder; i++)
- m_pChild[i] = NULL;
- }
- ~CTreeNode()
- {
- for(register int i=0; i<nOrder; i++)
- {
- if(m_pParent && m_pParent->m_pChild[i] == this)
- m_pParent->SetChild(i, NULL);
- if(m_pChild[i])
- delete m_pChild[i];
- }
- }
- A *GetParent() { return m_pParent; }
- void SetParent(A *p) { m_pParent = p; }
- A *GetChild(int n) { return m_pChild[n]; }
- void SetChild(int n, A *p) { m_pChild[n] = p; }
- };
- /******************************************************************************
- * Class: CAVLTreeNode
- *******************************************************************************
- * Deriving from this class turns your class into a node to use in an AVL tree.
- * It was designed to work with CAVLTree (defined below).
- * Example:
- * #define CObjectTree CAVLTree<CObject>
- * class CObject : public CAVLTreeNode<CObject> { ... };
- ******************************************************************************/
- template <class A> class CAVLTreeNode : public CTreeNode<A, 2>
- {
- protected:
- short m_nBalance;
- protected:
- // Rotates pRoot left or right. Used to balance the tree. Returns true when the new root's parent needs to change its balance.
- // (To visualize what it's doing for either direction, replace nDirection with Left and nOtherDir with Right or vice-versa.)
- static bool RotateOnce(A *pRoot, int nDirection)
- {
- int nOtherDir = (nDirection == Left) ? Right : Left; // Get the other direction
- A *pParent = pRoot->m_pParent;
- int nSide = (pParent->m_pChild[Left] == pRoot) ? Left : Right;
- A *pNewRoot = pRoot->m_pChild[nOtherDir]; // Move nOtherDir child into root's current position (to move root in nDirection)
- pParent->m_pChild[nSide] = pNewRoot; // (Make parent point to new root)
- pNewRoot->m_pParent = pParent; // (Don't forget to change its parent)
- pRoot->m_pChild[nOtherDir] = pNewRoot->m_pChild[nDirection]; // Move new root's nDirection child to old root's nOtherDir
- if(pRoot->m_pChild[nOtherDir])
- pRoot->m_pChild[nOtherDir]->m_pParent = pRoot; // (Don't forget to change its parent)
-
- pNewRoot->m_pChild[nDirection] = pRoot; // Move old root down to the nDirection
- pRoot->m_pParent = pNewRoot; // (Don't forget to change its parent)
- // Update balances and return true if new root's parent's balance has changed
- bool bRetVal = (pNewRoot->m_nBalance == 0) ? false : true;
- pRoot->m_nBalance = -(nDirection ? ++(pNewRoot->m_nBalance) : --(pNewRoot->m_nBalance));
- return bRetVal;
- }
-
- // Rotates pRoot left or right twice (by rotating child in opposite direction first). Used to balance the tree. Returns true when the new root's parent needs to change its balance.
- // (To visualize what it's doing for either direction, replace nDirection with Left and nOtherDir with Right or vice-versa.)
- static bool RotateTwice(A *pRoot, int nDirection)
- {
- int nOtherDir = (nDirection == Left) ? Right : Left; // Get the other direction
- A *pParent = pRoot->m_pParent;
- int nSide = (pParent->m_pChild[Left] == pRoot) ? Left : Right;
- A *pNode = pRoot->m_pChild[nOtherDir]; // nOtherDir child doesn't move (but it gets a new parent)
- A *pNewRoot = pNode->m_pChild[nDirection]; // Move its nDirection child into root's current position (to move root in nDirection)
- pParent->m_pChild[nSide] = pNewRoot; // (Make parent point to new root)
- pNewRoot->m_pParent = pParent; // (Don't forget to change its parent)
- pRoot->m_pChild[nOtherDir] = pNewRoot->m_pChild[nDirection]; // Move new root's nDirection child to old root's nOtherDir
- if(pRoot->m_pChild[nOtherDir])
- pRoot->m_pChild[nOtherDir]->m_pParent = pRoot; // (Don't forget to change its parent)
- pNode->m_pChild[nDirection] = pNewRoot->m_pChild[nOtherDir]; // Move new root's nOtherDir child to the node that's not moving
- if(pNode->m_pChild[nDirection])
- pNode->m_pChild[nDirection]->m_pParent = pNode; // (Don't forget to change its parent)
- pNewRoot->m_pChild[nDirection] = pRoot; // Move old root down to the nDirection
- pRoot->m_pParent = pNewRoot; // (Don't forget to change its parent)
- pNewRoot->m_pChild[nOtherDir] = pNode; // Put the node that didn't move under new root
- pNode->m_pParent = pNewRoot; // (Don't forget to change its parent)
- // Update balances and return true
- pNewRoot->m_pChild[0]->m_nBalance = -max(pNewRoot->m_nBalance, 0);
- pNewRoot->m_pChild[1]->m_nBalance = -min(pNewRoot->m_nBalance, 0);
- pNewRoot->m_nBalance = 0;
- return true;
- }
- // Rebalances a single node. Returns true when the balance of pRoot's parent has been changed.
- static bool ReBalance(A *pRoot)
- {
- bool bHeightChange = false;
- if(pRoot->m_nBalance < -1)
- bHeightChange = (pRoot->m_pChild[0]->m_nBalance == 1) ? RotateTwice(pRoot, Right) : RotateOnce(pRoot, Right);
- else if(pRoot->m_nBalance > 1)
- bHeightChange = (pRoot->m_pChild[1]->m_nBalance == -1) ? RotateTwice(pRoot, Left) : RotateOnce(pRoot, Left);
- return bHeightChange;
- }
- // Moves a locked node down in the tree down to where it can be safely deleted.
- static void MoveDown(A *pNode)
- {
- // Get pNode's parent and the side that points to pNode
- A *pParent = pNode->m_pParent;
- int nSide = (pParent->m_pChild[Left] == pNode) ? Left : Right;
- // Find the next item in the sort order (right one, then left all the way down)
- A *pSwap = pNode->m_pChild[Right];
- while(pSwap->m_pChild[Left])
- pSwap = pSwap->m_pChild[Left];
- // Swap the parent and right child pointers of the two nodes (must be handled differently if pNode is pSwap's parent)
- A *pTemp = pSwap->m_pChild[Right];
- if(pSwap->m_pParent == pNode)
- {
- pNode->m_pParent = pSwap;
- pSwap->m_pChild[Right] = pNode;
- }
- else
- {
- pNode->m_pParent = pSwap->m_pParent;
- pNode->m_pParent->m_pChild[(pNode->m_pParent->m_pChild[Left] == pSwap) ? Left : Right] = pNode;
- pSwap->m_pChild[Right] = pNode->m_pChild[Right];
- pSwap->m_pChild[Right]->m_pParent = pSwap;
- }
- pNode->m_pChild[Right] = pTemp;
- if(pNode->m_pChild[Right])
- pNode->m_pChild[Right]->m_pParent = pNode;
- pSwap->m_pParent = pParent;
- pParent->m_pChild[nSide] = pSwap;
- // Swap the left child of the two nodes (easy because pNode's left child is never NULL and pSwap's left child is always NULL)
- pSwap->m_pChild[Left] = pNode->m_pChild[Left];
- pSwap->m_pChild[Left]->m_pParent = pSwap;
- pNode->m_pChild[Left] = NULL;
- // Swap the balance factors of the two nodes
- short nTemp = pNode->m_nBalance;
- pNode->m_nBalance = pSwap->m_nBalance;
- pSwap->m_nBalance = nTemp;
- }
- public:
- enum { Left, Right };
- CAVLTreeNode() : CTreeNode<A, 2>() { m_nBalance = 0; }
- bool IsInTree() { return (m_pParent != NULL); }
- int GetBalance() { return m_nBalance; }
- // Inserts the current node into an AVL tree which has a root of pRoot
- // pRoot is actually a placeholder node for the root, the tree actually starts in its left subtree
- // Returns true for success, false for failure
- bool Insert(A *pRoot)
- {
- A *pParent = pRoot;
- A *pNode = pRoot->m_pChild[Left];
- int nCompare = -1;
- while(pNode)
- {
- nCompare = pNode->Compare((A *)this);
- if(!nCompare)
- return false;
- pParent = pNode;
- pNode = pNode->m_pChild[(nCompare > 0) ? Right : Left];
- }
- pNode = (A *)this;
- pNode->m_pParent = pParent;
- pParent->m_pChild[(nCompare > 0) ? Right : Left] = pNode;
- while(pParent->IsInTree())
- {
- pNode = pParent;
- pParent = pNode->m_pParent;
- pNode->m_nBalance += nCompare;
- nCompare = (pParent->m_pChild[Left] == pNode) ? -1 : 1;
- if(!pNode->m_nBalance || ReBalance(pNode))
- break;
- }
- return true;
- }
- // Removes the current node from an AVL tree
- // Returns true for success, false for failure
- bool Remove()
- {
- if(m_pChild[Left] && m_pChild[Right])
- MoveDown((A *)this);
- int nDirection = (m_pChild[Left] != NULL) ? Left : Right;
- A *pParent = m_pParent;
- A *pNode = m_pChild[nDirection];
- m_pParent = NULL;
- m_pChild[nDirection] = NULL;
- int nCompare = (pParent->m_pChild[Left] == (A *)this) ? -1 : 1;
- pParent->m_pChild[(nCompare > 0) ? Right : Left] = pNode;
- if(pNode)
- pNode->m_pParent = pParent;
- while(pParent->IsInTree())
- {
- pNode = pParent;
- pParent = pNode->m_pParent;
- pNode->m_nBalance -= nCompare;
- nCompare = (pParent->m_pChild[Left] == pNode) ? -1 : 1;
- if(pNode->m_nBalance && !ReBalance(pNode))
- break;
- }
- return true;
- }
- };
- /*******************************************************************************
- * Class: CAVLTree
- ********************************************************************************
- * This class implements an AVL tree.
- *******************************************************************************/
- template <class A, class KeyType> class CAVLTree
- {
- protected:
- CAVLTreeNode<A> m_nRoot;
- int m_nCount;
- void RecursiveCount(A *pNode)
- {
- if(!pNode)
- return;
- m_nCount++;
- RecursiveCount(pNode->GetChild(0));
- RecursiveCount(pNode->GetChild(1));
- }
- public:
- CAVLTree() { m_nCount = 0; }
- bool IsEmpty() { return (GetRoot() == NULL); }
- A *GetRoot() { return m_nRoot.GetChild(0); }
- bool Insert(A *pNode) { return pNode->Insert((A *)&m_nRoot); }
- bool Remove(A *pNode) { return pNode->Remove(); }
- int GetCount()
- {
- m_nCount = 0;
- RecursiveCount(GetRoot());
- return m_nCount;
- }
- int GetMaxDepth()
- {
- A *pNode = GetRoot();
- for(int nDepth=0; pNode; nDepth++)
- pNode = pNode->GetChild(pNode->GetBalance() <= 0 ? 0 : 1);
- return nDepth;
- }
- A *FindKey(KeyType tKey)
- {
- int nCompare;
- A *pNode = GetRoot();
- while(pNode && (nCompare = pNode->Compare(tKey)) != 0)
- pNode = (nCompare > 0) ? pNode->GetChild(1) : pNode->GetChild(0);
- return pNode;
- }
- A *Remove(KeyType tKey)
- {
- A *pNode = FindKey(tKey);
- if(pNode)
- pNode->Remove();
- return pNode;
- }
- };
- #endif // __ListTemplates_h__