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: 2008-07-11 09:28:48 +0200 (Fri, 11 Jul 2008) $ by $Author: tack $
 *     $Revision: 7285 $
 *
 *  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.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 */

#ifndef __GECODE_INT_DISTINCT_HH__
#define __GECODE_INT_DISTINCT_HH__

#include "gecode/int.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(Space* 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, ModEventDelta med);
    virtual Reflection::ActorSpec spec(const Space* home,
                                        Reflection::VarMap& m) const;
    static Support::Symbol ati(void);
    static void post(Space* home, Reflection::VarMap& vars,
                     const Reflection::ActorSpec& spec);
    static ExecStatus post(Space* 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;
    Bnd(Space* home, ViewArray<View>& x);
    Bnd(Space* home, bool share, Bnd<View>& p);
  public:
    static ExecStatus post(Space* home, ViewArray<View>& x);
    static void post(Space* home, Reflection::VarMap& vars,
                     const Reflection::ActorSpec& spec);
    virtual ExecStatus propagate(Space* home, ModEventDelta med);
    virtual PropCost cost(ModEventDelta med) const;
    virtual Actor* copy(Space* home, bool share);
    virtual size_t dispose(Space* home);
    virtual Reflection::ActorSpec spec(const Space* home,
                                        Reflection::VarMap& m) const;
    static Support::Symbol ati(void);
  };

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

  template <class View> class ViewNode;
  template <class View> class ValNode;

  template <class View>
  class DomCtrl {
  protected:
    class ViewValGraph {
    public:
      ViewNode<View>** view; 
      int n_view;
      ValNode<View>* val;
      int n_val;
      unsigned int count;
    public:
      ViewValGraph(void);
      bool initialized(void) const;
      ExecStatus init(Space* home, int n, View* x);
      void mark(void);
      ExecStatus tell(Space* home, bool& assigned);
      void purge(void);
      bool sync(void);
    public:
      typedef Support::SentinelStack<ViewNode<View>*> MatchStack;
      bool match(MatchStack& m, ViewNode<View>* x);
    };
    ViewValGraph vvg;
  public:
    DomCtrl(void);
    bool available(void);
    ExecStatus init(Space* home, int n, View* x);
    ExecStatus sync(void);
    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(Space* home, ViewArray<View>& x);
  public:
    virtual ExecStatus propagate(Space* home, ModEventDelta med);
    virtual PropCost cost(ModEventDelta med) const;
    virtual Actor* copy(Space* home, bool share);
    virtual Reflection::ActorSpec spec(const Space* home,
                                        Reflection::VarMap& m) const;
    static Support::Symbol ati(void);
    static  ExecStatus post(Space* home, ViewArray<View>& x);
    static void post(Space* home, Reflection::VarMap& vars,
                     const Reflection::ActorSpec& spec);
  };

  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(Space* home, View x0, View x1, View x2);
  public:
    virtual ExecStatus propagate(Space* home, ModEventDelta med);
    virtual Actor* copy(Space* home, bool share);
    virtual Reflection::ActorSpec spec(const Space* home,
                                        Reflection::VarMap& m) const;
    static Support::Symbol ati(void);
    static  ExecStatus post(Space* home, View x0, View x1, View x2);
    static void post(Space* home, Reflection::VarMap& vars,
                     const Reflection::ActorSpec& spec);
  };

}}}

#include "gecode/int/distinct/val.icc"
#include "gecode/int/distinct/bnd.icc"
#include "gecode/int/distinct/ter-dom.icc"
#include "gecode/int/distinct/dom.icc"

#endif

// STATISTICS: int-prop