102 lines
2.1 KiB
C++
102 lines
2.1 KiB
C++
|
|
template <class Type> class CLinkedList;
|
|
|
|
template <class Type> struct CLinkedNode
|
|
{
|
|
public:
|
|
CLinkedNode <Type> *pNext;
|
|
Type that;
|
|
};
|
|
|
|
template <class Type> class CLinkedWalk
|
|
{
|
|
public:
|
|
CLinkedWalk(CLinkedList<Type> *plist) : _plist(plist), _pCurr(NULL), _pLast(NULL) {}
|
|
CLinkedWalk() : _plist(NULL), _pCurr(NULL), _pLast(NULL) {}
|
|
void Init(CLinkedList<Type> *plist) {_plist = plist; _pCurr = _pLast = NULL;}
|
|
inline BOOL IsFirst(void) { return _pLast == NULL;}
|
|
inline Type *That(void) {return _pCurr ? &_pCurr->that : NULL;}
|
|
inline CLinkedNode<Type> *Node(void) {return _pCurr;}
|
|
inline BOOL Step(void)
|
|
{
|
|
_pLast = _pCurr;
|
|
|
|
if (_pCurr)
|
|
_pCurr = _pCurr->pNext;
|
|
else if (_plist)
|
|
_pCurr = _plist->_pFirst;
|
|
|
|
return (_pCurr != NULL);
|
|
}
|
|
|
|
inline CLinkedNode<Type> *Remove(void)
|
|
{
|
|
CLinkedNode<Type> *pRet = _pCurr;
|
|
if (pRet)
|
|
{
|
|
_pCurr = _pCurr->pNext;
|
|
|
|
// update the list
|
|
if (_pLast)
|
|
_pLast->pNext = _pCurr;
|
|
else
|
|
_plist->_pFirst = _pCurr;
|
|
}
|
|
return pRet;
|
|
}
|
|
|
|
inline void Delete(void)
|
|
{
|
|
CLinkedNode<Type> *p = Remove();
|
|
if (p)
|
|
delete p;
|
|
}
|
|
|
|
protected:
|
|
CLinkedList<Type> *_plist;
|
|
CLinkedNode<Type> *_pCurr;
|
|
CLinkedNode<Type> *_pLast;
|
|
};
|
|
|
|
template <class Type> class CLinkedList
|
|
{
|
|
public: //methods
|
|
CLinkedList() :_pFirst(NULL) {}
|
|
~CLinkedList()
|
|
{
|
|
CLinkedWalk<Type> lw(this);
|
|
|
|
while (lw.Step())
|
|
{
|
|
lw.Delete();
|
|
}
|
|
}
|
|
inline BOOL IsEmpty(void) {return _pFirst == NULL;}
|
|
inline BOOL Insert(CLinkedNode<Type> *p)
|
|
{
|
|
p->pNext = _pFirst;
|
|
_pFirst = p;
|
|
return TRUE;
|
|
}
|
|
|
|
inline void Remove(CLinkedNode<Type> *pRemove)
|
|
{
|
|
CLinkedWalk<Type> lw(this);
|
|
|
|
while (lw.Step())
|
|
{
|
|
if (lw.Node() == pRemove)
|
|
{
|
|
lw.Remove();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected:
|
|
CLinkedNode <Type> *_pFirst;
|
|
|
|
friend class CLinkedWalk<Type>;
|
|
};
|
|
|