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HxReduceAdaptor.h

/*
 *  Copyright (c) 2000, University of Amsterdam, The Netherlands.
 *  All rights reserved.
 *
 *  Author(s):
 *  Edo Poll                (poll@wins.uva.nl)
 */

#ifndef HxReduceAdaptor_h
#define HxReduceAdaptor_h

#include "HxTagList.h"
#include "HxString.h"


template<class ReduceOpT>
class HxReduceAdaptor
{
public:
    typedef HxTagPixOpOut       DirectionCategory;
    typedef HxTagTransInVar     TransVarianceCategory;
    typedef HxTagNPhase         PhaseCategory;

    typedef typename ReduceOpT::ArithType ArithType;

                        HxReduceAdaptor(HxTagList& tags)
                            : _redOp(tags), _tags(tags) {}

    void                doIt(const ArithType& v) { _redOp.doIt(_r, v); }

    int                 nrPhases() const { return 1; }
    void                init(int) { _r = ReduceOpT::neutralElement(); }
    void                done(int) { HxAddTag<HxValue>(_tags, "result", _r); }

    static HxString     className() { return ReduceOpT::className(); }

private:
    ArithType           _r;
    ReduceOpT           _redOp;
    HxTagList&          _tags;
};

#endif

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