207 lines
3.5 KiB
C++
207 lines
3.5 KiB
C++
//
|
|
//
|
|
// MODULE: RSStack.h
|
|
//
|
|
// PURPOSE: First in first out single linked list.
|
|
//
|
|
// PROJECT: Generic Troubleshooter DLL for Microsoft AnswerPoint
|
|
//
|
|
// COMPANY: Saltmine Creative, Inc. (206)-633-4743 support@saltmine.com
|
|
//
|
|
// AUTHOR: Richard Meadows
|
|
//
|
|
// ORIGINAL DATE: 8/7/96
|
|
//
|
|
// NOTES:
|
|
// 1. A stack of any structure. Can be used for pointers, but
|
|
// will cause a memory leak when the stack is destroyed with
|
|
// objects on it.
|
|
//
|
|
// 2. This file has no .cpp file. Every thing is inline, due to the
|
|
// template class.
|
|
//
|
|
// Version Date By Comments
|
|
//--------------------------------------------------------------------
|
|
// V0.1 - RM Original
|
|
// V0.3 3/24/98 JM Local Version for NT5
|
|
//
|
|
|
|
#ifndef __RSSTACK_H_
|
|
#define __RSSTACK_H_ 1
|
|
|
|
template<class T>
|
|
class RSStack
|
|
{
|
|
public:
|
|
RSStack();
|
|
virtual ~RSStack();
|
|
// Attributes
|
|
public:
|
|
|
|
private:
|
|
typedef struct tagRSStackNode
|
|
{
|
|
T SItem;
|
|
struct tagRSStackNode *pNext;
|
|
} RSStackNode;
|
|
|
|
RSStackNode *m_pTop;
|
|
RSStackNode *m_pPeak;
|
|
|
|
// Operations
|
|
public:
|
|
/*
|
|
Push returns -1 when out of memory.
|
|
*/
|
|
int Push(T);
|
|
/*
|
|
Pop returns the top T item.
|
|
*/
|
|
T Pop();
|
|
/*
|
|
1 is the top most item in the stack. Returns the T item at
|
|
tdown index by copying the value to refedItem. False is returned if
|
|
tdown is greater than the number of items in the stack.
|
|
*/
|
|
BOOL GetAt(int tdown, T &refedItem);
|
|
/*
|
|
PeakFirst returns the top most item and initializes variables that are
|
|
used by PeakNext. PeakFirst returns false when the stack is empty.
|
|
*/
|
|
BOOL PeakFirst(T &refedItem);
|
|
/*
|
|
Use PeakNext to quickly peak at all of the items on the stack.
|
|
PeakNext returns false when it can not copy a T item to refedItem.
|
|
*/
|
|
BOOL PeakNext(T &refedItem);
|
|
/*
|
|
Empty returns TRUE (Non-Zero) when the stack is empty.
|
|
*/
|
|
BOOL Empty();
|
|
/*
|
|
RemoveAll throws away the contents of the stack.
|
|
*/
|
|
void RemoveAll();
|
|
};
|
|
|
|
template<class T>
|
|
inline RSStack<T>::RSStack()
|
|
{
|
|
m_pTop = NULL;
|
|
m_pPeak = NULL;
|
|
}
|
|
|
|
template<class T>
|
|
inline RSStack<T>::~RSStack()
|
|
{
|
|
RSStackNode *pOld;
|
|
while(m_pTop != NULL)
|
|
{
|
|
pOld = m_pTop;
|
|
m_pTop = m_pTop->pNext;
|
|
delete pOld;
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
inline int RSStack<T>::Push(T Item)
|
|
{
|
|
int Ret;
|
|
RSStackNode *pNew = new RSStackNode;
|
|
if(NULL == pNew)
|
|
{
|
|
Ret = -1;
|
|
}
|
|
else
|
|
{
|
|
Ret = 1;
|
|
pNew->pNext = m_pTop;
|
|
m_pTop = pNew;
|
|
pNew->SItem = Item;
|
|
}
|
|
return Ret;
|
|
}
|
|
|
|
template<class T>
|
|
inline T RSStack<T>::Pop()
|
|
{
|
|
T Ret;
|
|
if(NULL != m_pTop)
|
|
{
|
|
RSStackNode *pOld = m_pTop;
|
|
m_pTop = m_pTop->pNext;
|
|
Ret = pOld->SItem;
|
|
delete pOld;
|
|
}
|
|
return Ret;
|
|
}
|
|
|
|
template<class T>
|
|
inline BOOL RSStack<T>::Empty()
|
|
{
|
|
BOOL bRet;
|
|
if(NULL == m_pTop)
|
|
bRet = TRUE;
|
|
else
|
|
bRet = FALSE;
|
|
return bRet;
|
|
}
|
|
|
|
template<class T>
|
|
inline void RSStack<T>::RemoveAll()
|
|
{
|
|
RSStackNode *pOld;
|
|
while(m_pTop != NULL)
|
|
{
|
|
pOld = m_pTop;
|
|
m_pTop = m_pTop->pNext;
|
|
delete pOld;
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
inline BOOL RSStack<T>::GetAt(int tdown, T &refedItem)
|
|
{
|
|
BOOL bRet = FALSE;
|
|
RSStackNode *pNode = m_pTop;
|
|
while(pNode != NULL && tdown > 1)
|
|
{
|
|
pNode = pNode->pNext;
|
|
tdown--;
|
|
}
|
|
if (pNode && 1 == tdown)
|
|
{
|
|
refedItem = pNode->SItem;
|
|
bRet = TRUE;
|
|
}
|
|
return bRet;
|
|
}
|
|
|
|
template<class T>
|
|
inline BOOL RSStack<T>::PeakFirst(T &refedItem)
|
|
{
|
|
BOOL bRet = FALSE;
|
|
if (NULL != m_pTop)
|
|
{
|
|
m_pPeak = m_pTop;
|
|
refedItem = m_pTop->SItem;
|
|
bRet = TRUE;
|
|
}
|
|
return bRet;
|
|
}
|
|
|
|
template<class T>
|
|
inline BOOL RSStack<T>::PeakNext(T &refedItem)
|
|
{
|
|
ASSERT(NULL != m_pPeak);
|
|
BOOL bRet = FALSE;
|
|
m_pPeak = m_pPeak->pNext;
|
|
if (NULL != m_pPeak)
|
|
{
|
|
refedItem = m_pPeak->SItem;
|
|
bRet = TRUE;
|
|
}
|
|
return bRet;
|
|
}
|
|
|
|
#endif |