distinct.hh

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *     Guido Tack <tack@gecode.org>
 *
 *  Contributing authors:
 *     Gabor Szokoli <szokoli@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2002
 *     Guido Tack, 2004
 *     Gabor Szokoli, 2003
 *
 *  Last modified:
 *     $Date: 2016-06-29 17:28:17 +0200 (Wed, 29 Jun 2016) $ by $Author: schulte $
 *     $Revision: 15137 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
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 */

#ifndef __GECODE_INT_DISTINCT_HH__
#define __GECODE_INT_DISTINCT_HH__

#include <gecode/int.hh>

#include <gecode/int/view-val-graph.hh>
#include <gecode/int/rel.hh>

namespace Gecode { namespace Int { namespace Distinct {

  template<class View>
  class Val : public NaryPropagator<View,PC_INT_VAL> {
  protected:
    using NaryPropagator<View,PC_INT_VAL>::x;

    Val(Home home, ViewArray<View>& x);
    Val(Space& home, bool share, Val<View>& p);
  public:
    virtual Actor*     copy(Space& home, bool share);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, ViewArray<View>& x);
  };

  template<class View, bool complete>
  ExecStatus prop_val(Space& home, ViewArray<View>&);



  template<class View>
  class Bnd : public Propagator {
  protected:
    ViewArray<View> x;
    ViewArray<View> y;
    int min_x;
    int max_x;
    Bnd(Home home, ViewArray<View>& x);
    Bnd(Space& home, bool share, Bnd<View>& p);
  public:
    static ExecStatus post(Home home, ViewArray<View>& x);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
    virtual void reschedule(Space& home);
    virtual Actor* copy(Space& home, bool share);
    virtual size_t dispose(Space& home);
  };

  template<class View>
  ExecStatus prop_bnd(Space& home, ViewArray<View>& x, int& min_x, int& max_x);

  template<class View>
  ExecStatus prop_bnd(Space& home, ViewArray<View>& x);


  template<class View>
  class Graph : public ViewValGraph::Graph<View> {
  public:
    using ViewValGraph::Graph<View>::view;
    using ViewValGraph::Graph<View>::n_view;
    using ViewValGraph::Graph<View>::val;
    using ViewValGraph::Graph<View>::n_val;
    using ViewValGraph::Graph<View>::count;
    using ViewValGraph::Graph<View>::scc;
    using ViewValGraph::Graph<View>::match;
    Graph(void);
    ExecStatus init(Space& home, ViewArray<View>& x);
    bool mark(Space& home);
    ExecStatus prune(Space& home, bool& assigned);
    bool sync(Space& home);
  };

  template<class View>
  class DomCtrl {
  protected:
    Graph<View> g;
  public:
    DomCtrl(void);
    bool available(void);
    ExecStatus init(Space& home, ViewArray<View>& x);
    ExecStatus sync(Space& home);
    ExecStatus propagate(Space& home, bool& assigned);
  };

  template<class View>
  class Dom : public NaryPropagator<View,PC_INT_DOM> {
  protected:
    using NaryPropagator<View,PC_INT_DOM>::x;
    DomCtrl<View> dc;
    Dom(Space& home, bool share, Dom<View>& p);
    Dom(Home home, ViewArray<View>& x);
  public:
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
    virtual Actor* copy(Space& home, bool share);
    static ExecStatus post(Home home, ViewArray<View>& x);
  };

  template<class View>
  class TerDom : public TernaryPropagator<View,PC_INT_DOM> {
  protected:
    using TernaryPropagator<View,PC_INT_DOM>::x0;
    using TernaryPropagator<View,PC_INT_DOM>::x1;
    using TernaryPropagator<View,PC_INT_DOM>::x2;

    TerDom(Space& home, bool share, TerDom<View>& p);
    TerDom(Home home, View x0, View x1, View x2);
  public:
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    virtual Actor* copy(Space& home, bool share);
    static  ExecStatus post(Home home, View x0, View x1, View x2);
  };

  class EqIte : public BinaryPropagator<IntView,PC_INT_DOM> {
  protected:
    using BinaryPropagator<IntView,PC_INT_DOM>::x0;
    using BinaryPropagator<IntView,PC_INT_DOM>::x1;
    int c0, c1;
    EqIte(Space& home, bool share, EqIte& p);
    EqIte(Home home, IntView x0, IntView x1, int c0, int c1);
  public:
    GECODE_INT_EXPORT
    virtual Actor* copy(Space& home, bool share);
    GECODE_INT_EXPORT
    virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
    GECODE_INT_EXPORT
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, IntView x0, IntView x1, int c0, int c1);
  };

}}}

#include <gecode/int/distinct/val.hpp>
#include <gecode/int/distinct/bnd.hpp>
#include <gecode/int/distinct/ter-dom.hpp>
#include <gecode/int/distinct/graph.hpp>
#include <gecode/int/distinct/dom-ctrl.hpp>
#include <gecode/int/distinct/dom.hpp>
#include <gecode/int/distinct/eqite.hpp>

#endif

// STATISTICS: int-prop