convex.cpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2005
 *
 *  Last modified:
 *     $Date: 2010-04-08 12:35:31 +0200 (Thu, 08 Apr 2010) $ by $Author: schulte $
 *     $Revision: 10684 $
 *
 *  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
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 *  permit persons to whom the Software is furnished to do so, subject to
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 *  included in all copies or substantial portions of the Software.
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#include "test/set.hh"

using namespace Gecode;

namespace Test { namespace Set {

  namespace Convex {


    static IntSet ds_33(-4,4);

    class Convex : public SetTest {
    public:
      Convex(const char* t)
        : SetTest(t,1,ds_33,false) {}
      virtual bool solution(const SetAssignment& x) const {
        CountableSetRanges xr0(x.lub, x[0]);
        if (!xr0())
          return true;
        ++xr0;
        if (!xr0())
          return true;
        return false;
      }
      virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
        Gecode::convex(home, x[0]);
      }
    };
    Convex _convex("Convex::Convex");

    class ConvexHull : public SetTest {
    public:
      ConvexHull(const char* t)
        : SetTest(t,2,ds_33,false) {}
      virtual bool solution(const SetAssignment& x) const {
        CountableSetRanges xr0(x.lub, x[0]);
        CountableSetRanges xr1(x.lub, x[1]);

        if (!xr0())
          return !xr1();

        int x0min = xr0.min();
        int x0max = xr0.max();
        ++xr0;
        if (!xr0()) {
          if (!xr1()) return false;
          if (x0min != xr1.min()) return false;
          int x1max = Gecode::Set::Limits::min;
          while (xr1()) { x1max = xr1.max(); ++xr1;}
          if (x0max != x1max) return false;
          return true;
        }
        return false;
      }
      virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
        Gecode::convex(home, x[1], x[0]);
      }
    };
    ConvexHull _convexhull("Convex::ConvexHull");

    class ConvexHullS : public SetTest {
    public:
      ConvexHullS(const char* t)
        : SetTest(t,1,ds_33,false) {}
      virtual bool solution(const SetAssignment& x) const {
        CountableSetRanges xr0(x.lub, x[0]);
        if (!xr0())
          return true;
        ++xr0;
        if (!xr0())
          return true;
        return false;
      }
      virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
        Gecode::convex(home, x[0], x[0]);
      }
    };
    ConvexHullS _convexhulls("Convex::Sharing::ConvexHullS");


}}}

// STATISTICS: test-set