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/*
* CENA C++ Utilities
*
* by Stephane Chatty
*
* Copyright 1992-1995
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* plain and generic double-linked lists (original ideas by Yves Berteaud)
*
* $Id$
* $CurLog$
*/
#ifndef DList_H_
#define DList_H_
#include "cplus_bugs.h"
#include <sys/types.h>
class CcuAllocator;
typedef void CcuDListItem;
#ifdef CPLUS_BUG20
class CcuDListLink;
#endif
class CcuDList {
friend class CcuDListIter;
#ifndef CPLUS_BUG20
class CcuDListLink {
static CcuAllocator* DListLinkMem;
public:
CcuDListItem* Entry;
CcuDListLink* Previous;
CcuDListLink* Next;
inline CcuDListLink (CcuDListItem* e, CcuDListLink* p) : Entry (e), Previous (p), Next (p->Next) { Previous->Next = Next->Previous = this; }
inline CcuDListLink (CcuDListItem* e) : Entry (e), Previous (this), Next (this) {}
void* operator new (size_t);
void operator delete (void*);
};
#endif
public:
enum dlist_status { NoError, WasEmpty, TooEarly, TooFar, BadIterator };
enum dlist_remove { All = -1 };
private:
CcuDListLink* LastLink;
dlist_status StatusFlag;
void InsertAfterLink (CcuDListLink*, CcuDListItem*);
CcuDListItem* RemoveLink (CcuDListLink*);
public:
inline CcuDList () : LastLink (0), StatusFlag (NoError) { }
CcuDList (CcuDListItem*);
CcuDList (const CcuDList&);
~CcuDList ();
CcuDList& operator = (const CcuDList&);
inline dlist_status GetStatus () const { return StatusFlag; }
inline int IsEmpty () const { return !LastLink; }
CcuDListItem* First ();
CcuDListItem* Last ();
CcuDListItem* Nth (int n);
int Length () const;
int Find (CcuDListItem*) const;
void Append (CcuDListItem*);
void Prepend (CcuDListItem*);
inline CcuDList& operator << (CcuDListItem* it) { Append (it); return *this; }
CcuDListItem* RemoveFirst ();
CcuDListItem* RemoveLast ();
int Remove (CcuDListItem*, int = 1);
int Remove (int (*) (CcuDListItem*), int = 1);
void Clear ();
void InsertAfter (const CcuDListIter&, CcuDListItem*);
void InsertBefore (const CcuDListIter&, CcuDListItem*);
CcuDListItem* RemoveAfter (const CcuDListIter&);
CcuDListItem* RemoveAt (CcuDListIter&);
};
class CcuDListIter {
friend class CcuDList;
public:
enum dlistiter_status { Normal, StartOfList, EndOfList };
private:
const CcuDList* TheList;
#ifdef CPLUS_BUG20
CcuDListLink* CurLink;
#else
CcuDList::CcuDListLink* CurLink;
#endif
dlistiter_status StatusFlag;
public:
inline CcuDListIter (const CcuDList& l) : TheList (&l), CurLink (0), StatusFlag (StartOfList) {}
inline void Reset () { CurLink = 0; StatusFlag = StartOfList; }
inline void GotoEnd () { CurLink = TheList->LastLink; StatusFlag = CurLink ? EndOfList : StartOfList; }
inline CcuDListIter& operator = (const CcuDList& l) { TheList = &l; CurLink = 0; StatusFlag = StartOfList; return *this; }
inline CcuDListIter& operator = (const CcuDListIter& li) { TheList = li.TheList; CurLink = li.CurLink; StatusFlag = li.StatusFlag; return *this; }
CcuDListIter& operator ++ ();
CcuDListIter& operator -- ();
int Find (CcuDListItem*);
int FindBack (CcuDListItem*);
CcuDListItem* operator * () const;
inline dlistiter_status GetStatus () const { return StatusFlag; }
inline operator int () const { return StatusFlag == Normal; }
};
#ifndef CPLUS_BUG19
template <class ITEM> class CcuDListIterOf;
template <class ITEM> class CcuDListOf : public CcuDList {
public:
inline CcuDListOf () : CcuDList () {}
inline CcuDListOf (ITEM* it) : CcuDList (it) {}
inline ITEM* First () { return (ITEM*) (CcuDList::First ()); }
inline ITEM* Last () { return (ITEM*) (CcuDList::Last ()); }
inline ITEM* Nth (int n) { return (ITEM*) (CcuDList::Nth (n)); }
inline int Find (ITEM* it) const { return CcuDList::Find (it); }
inline void Append (ITEM* it) { CcuDList::Append (it); }
inline void Prepend (ITEM* it) { CcuDList::Prepend (it); }
inline CcuDListOf <ITEM>& operator << (ITEM* it) { CcuDList::Append (it); return *this; }
inline ITEM* RemoveFirst () { return (ITEM*) (CcuDList::RemoveFirst ()); }
inline ITEM* RemoveLast () { return (ITEM*) (CcuDList::RemoveLast ()); }
inline int Remove (ITEM* it, int nb = 1) { return CcuDList::Remove (it, nb); }
inline int Remove (int (*p) (ITEM*), int nb = 1) { return CcuDList::Remove ((int (*) (ITEM*)) p, nb); }
inline void InsertAfter (const CcuDListIterOf <ITEM>& li, ITEM*it) { CcuDList::InsertAfter (li, it); }
inline void InsertBefore (const CcuDListIterOf <ITEM>& li, ITEM* it) { CcuDList::InsertBefore (li, it); }
inline ITEM* RemoveAfter (const CcuDListIterOf <ITEM>& li) { return (ITEM*) CcuDList::RemoveAfter (li); }
inline ITEM* RemoveAt (CcuDListIterOf <ITEM>& li) { return (ITEM*) CcuDList::RemoveAfter (li); }
};
template <class ITEM> class CcuDListIterOf : public CcuDListIter {
public:
inline CcuDListIterOf (const CcuDListOf <ITEM>& l) : CcuDListIter (l) { }
inline CcuDListIterOf <ITEM>& operator = (const CcuDListOf <ITEM>& l) { return (CcuDListIterOf <ITEM>&) CcuDListIter::operator = (l); }
inline CcuDListIterOf <ITEM>& operator = (const CcuDListIterOf <ITEM>& li) { return (CcuDListIterOf <ITEM>&) CcuDListIter::operator = (li); }
inline ITEM* operator * () const { return (ITEM*) CcuDListIter::operator * (); }
inline int Find (ITEM* it) { return CcuDListIter::Find (it); }
inline int FindBack (ITEM* it) { return CcuDListIter::FindBack (it); }
};
#endif /* CPLUS_BUG19 */
#endif /* DList_H_ */
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