pzlink.h

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#ifndef _TLINKHH_
#define _TLINKHH_

#include <stdio.h>


#ifdef WORKPOOL

class TPZWorkPool;

#endif


template< class ElemType >
class TPZLink
{
                struct Node
                {
                                ElemType elem;
                                Node     *next; 
                };
                
public:
                TPZLink();
                ~TPZLink();
                
#ifdef WORKPOOL

                void SetWorkPool(TPZWorkPool *wp);
#endif
                
                int Insert( ElemType &elem );
                int Append( ElemType &elem );
                int Remove();
                int Update( ElemType &elem );
                int Clear();
                
                TPZLink<ElemType> &operator=( TPZLink<ElemType> & );
                int Head();
                int Next();
                int Get( ElemType *pElem );
                ElemType *GetNode();
                int GetLast( ElemType *pElem );
                
private:
                Node *fHead;
                Node *fLast;
                Node *fThis;
                Node **fpBefore;
#ifdef WORKPOOL

                TPZWorkPool *fWp;
#endif
                
};


/*** Head ***/
template< class ElemType >
inline int
TPZLink<ElemType>::Head()
{
                fpBefore = &fHead;
                return( (fThis = fHead) != NULL );
}

/*** Next ***/
template< class ElemType >
inline int
TPZLink<ElemType>::Next()
{
                if ( fThis == NULL )
                                return( 0 );
                
                fpBefore = &fThis->next;
                fThis    =  fThis->next;
                return( 1 );
}

/*** Get ***/
template< class ElemType >
inline int
TPZLink<ElemType>::Get( ElemType *pElem )
{
                if ( fThis == NULL )
                                return( 0 );
                
                *pElem = fThis->elem;
                return( 1 );
}

/*** GetNode ***/
template< class ElemType >
inline ElemType *
TPZLink<ElemType>::GetNode()//TPZLink<ElemType>::GetNode()
{
                if(fThis) return &(fThis->elem);
                else return NULL;
}

/*** Get Last ***/
template< class ElemType >
inline int
TPZLink<ElemType>::GetLast( ElemType *pElem )
{
                if ( fLast == NULL )
                                return( 0 );
                
                *pElem = fLast->elem;
                return( 1 );
}

#ifdef WORKPOOL
template< class ElemType >
inline void
TPZLink<ElemType>::SetWorkPool( TPZWorkPool *wp )
{
                fWp = wp;
}
#endif

#endif