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673 lines
19 KiB
673 lines
19 KiB
#ifndef __CLIST_HPP__
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#define __CLIST_HPP__
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#include <limits.h>
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#include <string.h>
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// "Borrowed" from MFC
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#ifdef _DEBUG
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#define ASSERT_VALID(p) AssertValid()
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#else
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#define ASSERT_VALID(p) ((void)0)
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#endif
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#ifndef ASSERT
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#define ASSERT(x)
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#endif
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#ifndef AFXAPI
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#define AFXAPI __stdcall
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#endif
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typedef void* LISTPOSITION; // abstract iteration position
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#ifdef __cplusplus
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BOOL AFXAPI AfxIsValidAddress(const void* lp,
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UINT nBytes, BOOL bReadWrite = TRUE);
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struct CPlex // warning variable length structure
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{
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CPlex* pNext;
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UINT nMax;
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UINT nCur;
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/* BYTE data[maxNum*elementSize]; */
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void* data() { return this+1; }
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static CPlex* PASCAL Create(CPlex*& head, UINT nMax, UINT cbElement);
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// like 'calloc' but no zero fill
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// may throw memory exceptions
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void FreeDataChain(); // free this one and links
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};
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#ifdef _global_helper_
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/////////////////////////////////////////////////////////////////////////////
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// global helpers (can be overridden)
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template<class TYPE>
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inline void AFXAPI ConstructElements(TYPE* pElements, int nCount)
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{
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ASSERT(nCount == 0 ||
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AfxIsValidAddress(pElements, nCount * sizeof(TYPE)));
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// default is bit-wise zero initialization
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memset((void*)pElements, 0, nCount * sizeof(TYPE));
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}
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template<class TYPE>
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inline void AFXAPI DestructElements(TYPE* pElements, int nCount)
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{
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ASSERT(nCount == 0 ||
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AfxIsValidAddress(pElements, nCount * sizeof(TYPE)));
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pElements;
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nCount;
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}
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/* No need to serialize the list
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template<class TYPE>
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void AFXAPI SerializeElements(CArchive& ar, TYPE* pElements, int nCount)
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{
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ASSERT(nCount == 0 ||
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AfxIsValidAddress(pElements, nCount * sizeof(TYPE)));
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// default is bit-wise read/write
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if (ar.IsStoring())
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ar.Write((void*)pElements, nCount * sizeof(TYPE));
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else
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ar.Read((void*)pElements, nCount * sizeof(TYPE));
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}
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*/
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/* No need for debug dumping
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#ifdef _DEBUG
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template<class TYPE>
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void AFXAPI DumpElements(CDumpContext& dc, const TYPE* pElements, int nCount)
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{
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ASSERT(nCount == 0 ||
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AfxIsValidAddress(pElements, nCount * sizeof(TYPE)));
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dc; // not used
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pElements; // not used
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nCount; // not used
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// default does nothing
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}
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#endif
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*/
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template<class TYPE, class ARG_TYPE>
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BOOL AFXAPI CompareElements(const TYPE* pElement1, const ARG_TYPE* pElement2)
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{
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ASSERT(AfxIsValidAddress(pElement1, sizeof(TYPE)));
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ASSERT(AfxIsValidAddress(pElement2, sizeof(ARG_TYPE)));
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return *pElement1 == *pElement2;
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}
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template<class ARG_KEY>
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inline UINT AFXAPI HashKey(ARG_KEY key)
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{
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// default identity hash - works for most primitive values
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return ((UINT)(void*)(DWORD)key) >> 4;
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}
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#endif // _global_helper_
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/////////////////////////////////////////////////////////////////////////////
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// CList<TYPE, ARG_TYPE>
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template<class TYPE, class ARG_TYPE>
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class CList
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{
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#ifndef unix
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protected:
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#else
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// If this was not made public we get complier warnings
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// that CList<T,A>::CNode is not accessible from file scope
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// which means functions cant return CNode pointers
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public:
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#endif /* unix */
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struct CNode
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{
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CNode* pNext;
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CNode* pPrev;
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TYPE data;
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};
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public:
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// Construction
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CList(int nBlockSize = 10);
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// Attributes (head and tail)
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// count of elements
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int GetCount() const;
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BOOL IsEmpty() const;
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// peek at head or tail
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TYPE& GetHead();
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TYPE GetHead() const;
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TYPE& GetTail();
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TYPE GetTail() const;
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// Operations
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// get head or tail (and remove it) - don't call on empty list !
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TYPE RemoveHead();
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TYPE RemoveTail();
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// add before head or after tail
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LISTPOSITION AddHead(ARG_TYPE newElement);
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LISTPOSITION AddTail(ARG_TYPE newElement);
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// add another list of elements before head or after tail
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void AddHead(CList* pNewList);
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void AddTail(CList* pNewList);
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// remove all elements
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void RemoveAll();
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// iteration
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LISTPOSITION GetHeadPosition() const;
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LISTPOSITION GetTailPosition() const;
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TYPE& GetNext(LISTPOSITION& rPosition); // return *Position++
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TYPE GetNext(LISTPOSITION& rPosition) const; // return *Position++
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TYPE& GetPrev(LISTPOSITION& rPosition); // return *Position--
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TYPE GetPrev(LISTPOSITION& rPosition) const; // return *Position--
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// getting/modifying an element at a given position
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TYPE& GetAt(LISTPOSITION position);
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TYPE GetAt(LISTPOSITION position) const;
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void SetAt(LISTPOSITION pos, ARG_TYPE newElement);
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void RemoveAt(LISTPOSITION position);
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// inserting before or after a given position
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LISTPOSITION InsertBefore(LISTPOSITION position, ARG_TYPE newElement);
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LISTPOSITION InsertAfter(LISTPOSITION position, ARG_TYPE newElement);
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// helper functions (note: O(n) speed)
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LISTPOSITION Find(ARG_TYPE searchValue, LISTPOSITION startAfter = NULL) const;
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// defaults to starting at the HEAD, return NULL if not found
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LISTPOSITION FindIndex(int nIndex) const;
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// get the 'nIndex'th element (may return NULL)
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// Implementation
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protected:
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CNode* m_pNodeHead;
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CNode* m_pNodeTail;
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int m_nCount;
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CNode* m_pNodeFree;
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struct CPlex* m_pBlocks;
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int m_nBlockSize;
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CNode* NewNode(CNode*, CNode*);
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void FreeNode(CNode*);
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public:
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~CList();
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// void Serialize(CArchive&);
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#ifdef _DEBUG
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// void Dump(CDumpContext&) const;
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void AssertValid() const;
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#endif
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};
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/////////////////////////////////////////////////////////////////////////////
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// CList<TYPE, ARG_TYPE> inline functions
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template<class TYPE, class ARG_TYPE>
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inline int CList<TYPE, ARG_TYPE>::GetCount() const
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{ return m_nCount; }
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template<class TYPE, class ARG_TYPE>
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inline BOOL CList<TYPE, ARG_TYPE>::IsEmpty() const
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{ return m_nCount == 0; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE& CList<TYPE, ARG_TYPE>::GetHead()
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{ ASSERT(m_pNodeHead != NULL);
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return m_pNodeHead->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE CList<TYPE, ARG_TYPE>::GetHead() const
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{ ASSERT(m_pNodeHead != NULL);
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return m_pNodeHead->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE& CList<TYPE, ARG_TYPE>::GetTail()
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{ ASSERT(m_pNodeTail != NULL);
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return m_pNodeTail->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE CList<TYPE, ARG_TYPE>::GetTail() const
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{ ASSERT(m_pNodeTail != NULL);
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return m_pNodeTail->data; }
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template<class TYPE, class ARG_TYPE>
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inline LISTPOSITION CList<TYPE, ARG_TYPE>::GetHeadPosition() const
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{ return (LISTPOSITION) m_pNodeHead; }
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template<class TYPE, class ARG_TYPE>
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inline LISTPOSITION CList<TYPE, ARG_TYPE>::GetTailPosition() const
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{ return (LISTPOSITION) m_pNodeTail; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE& CList<TYPE, ARG_TYPE>::GetNext(LISTPOSITION& rPosition) // return *Position++
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{ CNode* pNode = (CNode*) rPosition;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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rPosition = (LISTPOSITION) pNode->pNext;
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE CList<TYPE, ARG_TYPE>::GetNext(LISTPOSITION& rPosition) const // return *Position++
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{ CNode* pNode = (CNode*) rPosition;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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rPosition = (LISTPOSITION) pNode->pNext;
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE& CList<TYPE, ARG_TYPE>::GetPrev(LISTPOSITION& rPosition) // return *Position--
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{ CNode* pNode = (CNode*) rPosition;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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rPosition = (LISTPOSITION) pNode->pPrev;
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE CList<TYPE, ARG_TYPE>::GetPrev(LISTPOSITION& rPosition) const // return *Position--
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{ CNode* pNode = (CNode*) rPosition;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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rPosition = (LISTPOSITION) pNode->pPrev;
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE& CList<TYPE, ARG_TYPE>::GetAt(LISTPOSITION position)
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{ CNode* pNode = (CNode*) position;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline TYPE CList<TYPE, ARG_TYPE>::GetAt(LISTPOSITION position) const
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{ CNode* pNode = (CNode*) position;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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return pNode->data; }
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template<class TYPE, class ARG_TYPE>
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inline void CList<TYPE, ARG_TYPE>::SetAt(LISTPOSITION pos, ARG_TYPE newElement)
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{ CNode* pNode = (CNode*) pos;
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ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
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pNode->data = newElement; }
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template<class TYPE, class ARG_TYPE>
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CList<TYPE, ARG_TYPE>::CList(int nBlockSize)
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{
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ASSERT(nBlockSize > 0);
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m_nCount = 0;
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m_pNodeHead = m_pNodeTail = m_pNodeFree = NULL;
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m_pBlocks = NULL;
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m_nBlockSize = nBlockSize;
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}
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template<class TYPE, class ARG_TYPE>
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void CList<TYPE, ARG_TYPE>::RemoveAll()
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{
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ASSERT_VALID(this);
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// destroy elements
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CNode* pNode;
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for (pNode = m_pNodeHead; pNode != NULL; pNode = pNode->pNext)
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DestructElements(&pNode->data, 1);
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m_nCount = 0;
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m_pNodeHead = m_pNodeTail = m_pNodeFree = NULL;
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m_pBlocks->FreeDataChain();
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m_pBlocks = NULL;
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}
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template<class TYPE, class ARG_TYPE>
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CList<TYPE, ARG_TYPE>::~CList()
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{
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RemoveAll();
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ASSERT(m_nCount == 0);
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}
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/////////////////////////////////////////////////////////////////////////////
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// Node helpers
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//
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// Implementation note: CNode's are stored in CPlex blocks and
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// chained together. Free blocks are maintained in a singly linked list
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// using the 'pNext' member of CNode with 'm_pNodeFree' as the head.
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// Used blocks are maintained in a doubly linked list using both 'pNext'
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// and 'pPrev' as links and 'm_pNodeHead' and 'm_pNodeTail'
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// as the head/tail.
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//
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// We never free a CPlex block unless the List is destroyed or RemoveAll()
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// is used - so the total number of CPlex blocks may grow large depending
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// on the maximum past size of the list.
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//
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template<class TYPE, class ARG_TYPE>
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typename CList<TYPE, ARG_TYPE>::CNode*
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CList<TYPE, ARG_TYPE>::NewNode(CNode* pPrev, CNode* pNext)
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{
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if (m_pNodeFree == NULL)
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{
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// add another block
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CPlex* pNewBlock = CPlex::Create(m_pBlocks, m_nBlockSize,
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sizeof(CNode));
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// chain them into free list
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CNode* pNode = (CNode*) pNewBlock->data();
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// free in reverse order to make it easier to debug
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pNode += m_nBlockSize - 1;
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for (int i = m_nBlockSize-1; i >= 0; i--, pNode--)
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{
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pNode->pNext = m_pNodeFree;
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m_pNodeFree = pNode;
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}
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}
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ASSERT(m_pNodeFree != NULL); // we must have something
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CList::CNode* pNode = m_pNodeFree;
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m_pNodeFree = m_pNodeFree->pNext;
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pNode->pPrev = pPrev;
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pNode->pNext = pNext;
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m_nCount++;
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ASSERT(m_nCount > 0); // make sure we don't overflow
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ConstructElements(&pNode->data, 1);
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return pNode;
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}
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template<class TYPE, class ARG_TYPE>
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void CList<TYPE, ARG_TYPE>::FreeNode(CNode* pNode)
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{
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DestructElements(&pNode->data, 1);
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pNode->pNext = m_pNodeFree;
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m_pNodeFree = pNode;
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m_nCount--;
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ASSERT(m_nCount >= 0); // make sure we don't underflow
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}
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template<class TYPE, class ARG_TYPE>
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LISTPOSITION CList<TYPE, ARG_TYPE>::AddHead(ARG_TYPE newElement)
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{
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ASSERT_VALID(this);
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CNode* pNewNode = NewNode(NULL, m_pNodeHead);
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pNewNode->data = newElement;
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if (m_pNodeHead != NULL)
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m_pNodeHead->pPrev = pNewNode;
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else
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m_pNodeTail = pNewNode;
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m_pNodeHead = pNewNode;
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return (LISTPOSITION) pNewNode;
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}
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template<class TYPE, class ARG_TYPE>
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LISTPOSITION CList<TYPE, ARG_TYPE>::AddTail(ARG_TYPE newElement)
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{
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ASSERT_VALID(this);
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CNode* pNewNode = NewNode(m_pNodeTail, NULL);
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pNewNode->data = newElement;
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if (m_pNodeTail != NULL)
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m_pNodeTail->pNext = pNewNode;
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else
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m_pNodeHead = pNewNode;
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m_pNodeTail = pNewNode;
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return (LISTPOSITION) pNewNode;
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}
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template<class TYPE, class ARG_TYPE>
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void CList<TYPE, ARG_TYPE>::AddHead(CList* pNewList)
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{
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ASSERT_VALID(this);
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ASSERT(pNewList != NULL);
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ASSERT_VALID(pNewList);
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// add a list of same elements to head (maintain order)
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LISTPOSITION pos = pNewList->GetTailPosition();
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while (pos != NULL)
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AddHead(pNewList->GetPrev(pos));
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}
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template<class TYPE, class ARG_TYPE>
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void CList<TYPE, ARG_TYPE>::AddTail(CList* pNewList)
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{
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ASSERT_VALID(this);
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ASSERT(pNewList != NULL);
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ASSERT_VALID(pNewList);
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// add a list of same elements
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LISTPOSITION pos = pNewList->GetHeadPosition();
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while (pos != NULL)
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AddTail(pNewList->GetNext(pos));
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}
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template<class TYPE, class ARG_TYPE>
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TYPE CList<TYPE, ARG_TYPE>::RemoveHead()
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{
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ASSERT_VALID(this);
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ASSERT(m_pNodeHead != NULL); // don't call on empty list !!!
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ASSERT(AfxIsValidAddress(m_pNodeHead, sizeof(CNode)));
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CNode* pOldNode = m_pNodeHead;
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TYPE returnValue = pOldNode->data;
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m_pNodeHead = pOldNode->pNext;
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if (m_pNodeHead != NULL)
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m_pNodeHead->pPrev = NULL;
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else
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m_pNodeTail = NULL;
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FreeNode(pOldNode);
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return returnValue;
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}
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template<class TYPE, class ARG_TYPE>
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TYPE CList<TYPE, ARG_TYPE>::RemoveTail()
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{
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ASSERT_VALID(this);
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ASSERT(m_pNodeTail != NULL); // don't call on empty list !!!
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ASSERT(AfxIsValidAddress(m_pNodeTail, sizeof(CNode)));
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CNode* pOldNode = m_pNodeTail;
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TYPE returnValue = pOldNode->data;
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m_pNodeTail = pOldNode->pPrev;
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if (m_pNodeTail != NULL)
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m_pNodeTail->pNext = NULL;
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else
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m_pNodeHead = NULL;
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FreeNode(pOldNode);
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return returnValue;
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}
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template<class TYPE, class ARG_TYPE>
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LISTPOSITION CList<TYPE, ARG_TYPE>::InsertBefore(LISTPOSITION position, ARG_TYPE newElement)
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{
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ASSERT_VALID(this);
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if (position == NULL)
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return AddHead(newElement); // insert before nothing -> head of the list
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// Insert it before position
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CNode* pOldNode = (CNode*) position;
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CNode* pNewNode = NewNode(pOldNode->pPrev, pOldNode);
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pNewNode->data = newElement;
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if (pOldNode->pPrev != NULL)
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{
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ASSERT(AfxIsValidAddress(pOldNode->pPrev, sizeof(CNode)));
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pOldNode->pPrev->pNext = pNewNode;
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}
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else
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{
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ASSERT(pOldNode == m_pNodeHead);
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m_pNodeHead = pNewNode;
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}
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pOldNode->pPrev = pNewNode;
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return (LISTPOSITION) pNewNode;
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}
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template<class TYPE, class ARG_TYPE>
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LISTPOSITION CList<TYPE, ARG_TYPE>::InsertAfter(LISTPOSITION position, ARG_TYPE newElement)
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{
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ASSERT_VALID(this);
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if (position == NULL)
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return AddTail(newElement); // insert after nothing -> tail of the list
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// Insert it before position
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CNode* pOldNode = (CNode*) position;
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ASSERT(AfxIsValidAddress(pOldNode, sizeof(CNode)));
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CNode* pNewNode = NewNode(pOldNode, pOldNode->pNext);
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pNewNode->data = newElement;
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|
|
if (pOldNode->pNext != NULL)
|
|
{
|
|
ASSERT(AfxIsValidAddress(pOldNode->pNext, sizeof(CNode)));
|
|
pOldNode->pNext->pPrev = pNewNode;
|
|
}
|
|
else
|
|
{
|
|
ASSERT(pOldNode == m_pNodeTail);
|
|
m_pNodeTail = pNewNode;
|
|
}
|
|
pOldNode->pNext = pNewNode;
|
|
return (LISTPOSITION) pNewNode;
|
|
}
|
|
|
|
template<class TYPE, class ARG_TYPE>
|
|
void CList<TYPE, ARG_TYPE>::RemoveAt(LISTPOSITION position)
|
|
{
|
|
ASSERT_VALID(this);
|
|
|
|
CNode* pOldNode = (CNode*) position;
|
|
ASSERT(AfxIsValidAddress(pOldNode, sizeof(CNode)));
|
|
|
|
// remove pOldNode from list
|
|
if (pOldNode == m_pNodeHead)
|
|
{
|
|
m_pNodeHead = pOldNode->pNext;
|
|
}
|
|
else
|
|
{
|
|
ASSERT(AfxIsValidAddress(pOldNode->pPrev, sizeof(CNode)));
|
|
pOldNode->pPrev->pNext = pOldNode->pNext;
|
|
}
|
|
if (pOldNode == m_pNodeTail)
|
|
{
|
|
m_pNodeTail = pOldNode->pPrev;
|
|
}
|
|
else
|
|
{
|
|
ASSERT(AfxIsValidAddress(pOldNode->pNext, sizeof(CNode)));
|
|
pOldNode->pNext->pPrev = pOldNode->pPrev;
|
|
}
|
|
FreeNode(pOldNode);
|
|
}
|
|
|
|
template<class TYPE, class ARG_TYPE>
|
|
LISTPOSITION CList<TYPE, ARG_TYPE>::FindIndex(int nIndex) const
|
|
{
|
|
ASSERT_VALID(this);
|
|
ASSERT(nIndex >= 0);
|
|
|
|
if (nIndex >= m_nCount)
|
|
return NULL; // went too far
|
|
|
|
CNode* pNode = m_pNodeHead;
|
|
while (nIndex--)
|
|
{
|
|
ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
|
|
pNode = pNode->pNext;
|
|
}
|
|
return (LISTPOSITION) pNode;
|
|
}
|
|
|
|
template<class TYPE, class ARG_TYPE>
|
|
LISTPOSITION CList<TYPE, ARG_TYPE>::Find(ARG_TYPE searchValue, LISTPOSITION startAfter) const
|
|
{
|
|
ASSERT_VALID(this);
|
|
|
|
CNode* pNode = (CNode*) startAfter;
|
|
if (pNode == NULL)
|
|
{
|
|
pNode = m_pNodeHead; // start at head
|
|
}
|
|
else
|
|
{
|
|
ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
|
|
pNode = pNode->pNext; // start after the one specified
|
|
}
|
|
|
|
for (; pNode != NULL; pNode = pNode->pNext)
|
|
if (CompareElements(&pNode->data, &searchValue))
|
|
return (LISTPOSITION)pNode;
|
|
return NULL;
|
|
}
|
|
|
|
#if 0 // Member was comment'd out in the class definition
|
|
template<class TYPE, class ARG_TYPE>
|
|
void CList<TYPE, ARG_TYPE>::Serialize(CArchive& ar)
|
|
{
|
|
ASSERT_VALID(this);
|
|
|
|
CObject::Serialize(ar);
|
|
|
|
if (ar.IsStoring())
|
|
{
|
|
ar << (WORD) m_nCount;
|
|
for (CNode* pNode = m_pNodeHead; pNode != NULL; pNode = pNode->pNext)
|
|
{
|
|
ASSERT(AfxIsValidAddress(pNode, sizeof(CNode)));
|
|
SerializeElements(ar, &pNode->data, 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
WORD nNewCount;
|
|
ar >> nNewCount;
|
|
|
|
TYPE newData;
|
|
while (nNewCount--)
|
|
{
|
|
SerializeElements(ar, &newData, 1);
|
|
AddTail(newData);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef _DEBUG
|
|
template<class TYPE, class ARG_TYPE>
|
|
void CList<TYPE, ARG_TYPE>::Dump(CDumpContext& dc) const
|
|
{
|
|
CObject::Dump(dc);
|
|
|
|
dc << "with " << m_nCount << " elements";
|
|
if (dc.GetDepth() > 0)
|
|
{
|
|
LISTPOSITION pos = GetHeadPosition();
|
|
while (pos != NULL)
|
|
{
|
|
dc << "\n";
|
|
DumpElements(dc, &((CList*)this)->GetNext(pos), 1);
|
|
}
|
|
}
|
|
|
|
dc << "\n";
|
|
}
|
|
|
|
template<class TYPE, class ARG_TYPE>
|
|
void CList<TYPE, ARG_TYPE>::AssertValid() const
|
|
{
|
|
// CObject::AssertValid();
|
|
|
|
if (m_nCount == 0)
|
|
{
|
|
// empty list
|
|
ASSERT(m_pNodeHead == NULL);
|
|
ASSERT(m_pNodeTail == NULL);
|
|
}
|
|
else
|
|
{
|
|
// non-empty list
|
|
ASSERT(AfxIsValidAddress(m_pNodeHead, sizeof(CNode)));
|
|
ASSERT(AfxIsValidAddress(m_pNodeTail, sizeof(CNode)));
|
|
}
|
|
}
|
|
#endif //_DEBUG
|
|
|
|
#endif // __cplusplus
|
|
|
|
#endif // __CLIST_HPP__
|
|
|
|
|