nvalues.hh

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2011
 *
 *  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_NVALUES_HH__
#define __GECODE_INT_NVALUES_HH__

#include <gecode/int.hh>
#include <gecode/int/val-set.hh>

namespace Gecode { namespace Int { namespace NValues {

  enum RangeEventType {
    RET_FST = 0,
    RET_LST = 1,
    RET_END = 2
  };

  class RangeEvent {
  public:
    RangeEventType ret;
    int val;
    int view;
    bool operator <(RangeEvent re) const;
  };

  class SymBitMatrix : public Support::BitSet<Region> {
  protected:
    int n;
    int pos(int x, int y) const;
  public:
    SymBitMatrix(Region& r, int n);
    bool get(int x, int y) const;
    void set(int x, int y);
  };

}}}

#include <gecode/int/nvalues/range-event.hpp>
#include <gecode/int/nvalues/sym-bit-matrix.hpp>

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

namespace Gecode { namespace Int { namespace NValues {

  class Graph : public ViewValGraph::Graph<IntView> {
  protected:
    int n_matched;
  public:
    Graph(void);
    int size(void) const;
    void init(Space& home, const ValSet& vs, const ViewArray<IntView>& x);
    void sync(void);
    /*
     * \brief Mark all edges used that can appear in some maximal matching
     *
     * Return true, if any edge can be in fact pruned.
     */
    bool mark(void);
    ExecStatus prune(Space& home);
  };

}}}

#include <gecode/int/nvalues/graph.hpp>

namespace Gecode { namespace Int { namespace NValues {

  template<class VY>
  class IntBase
    : public MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND> {
  protected:
    using MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND>::x;
    using MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND>::y;
    ValSet vs;
    IntBase(Home home, ValSet& vs, ViewArray<IntView>& x, VY y);
    IntBase(Space& home, IntBase<VY>& p);
    void add(Space& home);
    void disjoint(Space& home, Region& r, int*& dis, int& n_dis);
    void eliminate(Space& home);
    ExecStatus all_in_valset(Space& home);
    ExecStatus prune_lower(Space& home, int* dis, int n_dis);
    ExecStatus prune_upper(Space& home, Graph& g);
  public:
    virtual PropCost cost(const Space&, const ModEventDelta&) const;
    virtual size_t dispose(Space& home);
  };

  template<class VY>
  class EqInt : public IntBase<VY> {
  protected:
    using IntBase<VY>::x;
    using IntBase<VY>::y;
    using IntBase<VY>::vs;
    using IntBase<VY>::add;
    using IntBase<VY>::all_in_valset;
    using IntBase<VY>::disjoint;
    using IntBase<VY>::prune_lower;
    using IntBase<VY>::prune_upper;
    Graph g;
    EqInt(Home home, ValSet& vs, ViewArray<IntView>& x, VY y);
    EqInt(Space& home, EqInt<VY>& p);
  public:
    virtual Propagator* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, ViewArray<IntView>& x, VY y);
    virtual size_t dispose(Space& home);
  };

  template<class VY>
  class LqInt : public IntBase<VY> {
  protected:
    using IntBase<VY>::x;
    using IntBase<VY>::y;
    using IntBase<VY>::vs;
    using IntBase<VY>::add;
    using IntBase<VY>::all_in_valset;
    using IntBase<VY>::disjoint;
    using IntBase<VY>::prune_lower;
    using IntBase<VY>::prune_upper;
    LqInt(Home home, ValSet& vs, ViewArray<IntView>& x, VY y);
    LqInt(Space& home, LqInt<VY>& p);
  public:
    virtual Propagator* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, ViewArray<IntView>& x, VY y);
    virtual size_t dispose(Space& home);
  };

  template<class VY>
  class GqInt : public IntBase<VY> {
  protected:
    using IntBase<VY>::x;
    using IntBase<VY>::y;
    using IntBase<VY>::vs;
    using IntBase<VY>::add;
    using IntBase<VY>::all_in_valset;
    using IntBase<VY>::disjoint;
    using IntBase<VY>::prune_lower;
    using IntBase<VY>::prune_upper;
    using IntBase<VY>::eliminate;
    Graph g;
    GqInt(Home home, ValSet& vs, ViewArray<IntView>& x, VY y);
    GqInt(Space& home, GqInt<VY>& p);
  public:
    virtual Propagator* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, ViewArray<IntView>& x, VY y);
  };

}}}

#include <gecode/int/nvalues/int-base.hpp>
#include <gecode/int/nvalues/int-eq.hpp>
#include <gecode/int/nvalues/int-lq.hpp>
#include <gecode/int/nvalues/int-gq.hpp>

namespace Gecode { namespace Int { namespace NValues {

  template<class VY>
  class BoolBase : public Propagator {
  protected:
    static const int VS_ZERO = 1 << 0;
    static const int VS_ONE  = 1 << 1;
    int status;
    Council<ViewAdvisor<BoolView> > c;
    VY y;
    BoolBase(Home home, int status, ViewArray<BoolView>& x, VY y);
    BoolBase(Space& home, BoolBase<VY>& p);
  public:
    virtual ExecStatus advise(Space& home, Advisor& a, const Delta& d);
    virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
    virtual void reschedule(Space& home);
    virtual size_t dispose(Space& home);
  };

  template<class VY>
  class EqBool : public BoolBase<VY> {
  protected:
    using BoolBase<VY>::VS_ZERO;
    using BoolBase<VY>::VS_ONE;
    using BoolBase<VY>::status;
    using BoolBase<VY>::c;
    using BoolBase<VY>::y;
    EqBool(Home home, int status, ViewArray<BoolView>& x, VY y);
    EqBool(Space& home, EqBool<VY>& p);
  public:
    virtual Actor* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static ExecStatus post(Home home, ViewArray<BoolView>& x, VY y);
  };

  template<class VY>
  class LqBool : public BoolBase<VY> {
  protected:
    using BoolBase<VY>::VS_ZERO;
    using BoolBase<VY>::VS_ONE;
    using BoolBase<VY>::status;
    using BoolBase<VY>::c;
    using BoolBase<VY>::y;
    LqBool(Home home, int status, ViewArray<BoolView>& x, VY y);
    LqBool(Space& home, LqBool<VY>& p);
  public:
    virtual Actor* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static  ExecStatus post(Home home, ViewArray<BoolView>& x, VY y);
  };

  template<class VY>
  class GqBool : public BoolBase<VY> {
  protected:
    using BoolBase<VY>::VS_ZERO;
    using BoolBase<VY>::VS_ONE;
    using BoolBase<VY>::status;
    using BoolBase<VY>::c;
    using BoolBase<VY>::y;
    GqBool(Home home, int status, ViewArray<BoolView>& x, VY y);
    GqBool(Space& home, GqBool<VY>& p);
  public:
    virtual Actor* copy(Space& home);
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    static  ExecStatus post(Home home, ViewArray<BoolView>& x, VY y);
  };

}}}

#include <gecode/int/nvalues/bool-base.hpp>
#include <gecode/int/nvalues/bool-eq.hpp>
#include <gecode/int/nvalues/bool-lq.hpp>
#include <gecode/int/nvalues/bool-gq.hpp>

#endif

// STATISTICS: int-prop