Category : Recently Uploaded Files
Archive   : HEADZIP.EXE
Filename : GENLIST.H
// SPECIFICATION FILE (genlist.h)
// This module exports GenList, a generic list ADT. Each item in the
// list is a pointer to an actual data item.
// It is intended that specialized classes be derived from GenList
// and that GenList will be a private base class.
//----------------------------------------------------------------------
#ifndef GENLIST_H
#define GENLIST_H
#include "bool.h"
// DOMAIN: Each list is a collection of pointers, along with an
// implicit list cursor in the range 1..n+1, where n is
// the current length of the list
struct NodeType; // Complete declaration hidden in
// implementation file
class GenList {
public:
Boolean IsEmpty() const;
// POST: FCTVAL == (list is empty)
Boolean IsFull() const;
// POST: FCTVAL == (list is full)
void Reset();
// PRE: NOT IsEmpty()
// POST: List cursor is at front of list
Boolean EndOfList() const;
// POST: FCTVAL == (list cursor is beyond end of list)
void Advance();
// PRE: NOT IsEmpty() && NOT EndOfList()
// POST: List cursor has advanced to next item
void* CurrentItem() const;
// PRE: NOT IsEmpty() && NOT EndOfList()
// POST: FCTVAL == item at list cursor
void InsertBefore( /* in */ void* somePtr );
// PRE: Assigned(somePtr) && NOT IsFull()
// POST: somePtr inserted before list cursor
// (at back, if EndOfList())
// && This is the new current item
void InsertAfter( /* in */ void* somePtr );
// PRE: Assigned(somePtr) && NOT IsEmpty()
// && NOT IsFull() && NOT EndOfList()
// POST: somePtr inserted after list cursor
// && This is the new current item
void Delete();
// PRE: NOT IsEmpty() && NOT EndOfList()
// POST: Item at list cursor deleted
// && Successor of deleted item is now the current item
GenList();
// POST: Created(list) && IsEmpty() && EndOfList()
GenList( const GenList& otherList );
// POST: Created(list) && list == otherList && EndOfList()
~GenList();
// POST: List destroyed
private:
NodeType* head;
NodeType* currPtr;
};
#endif
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