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convex.cpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Guido Tack <tack@gecode.org>
5  *
6  * Copyright:
7  * Guido Tack, 2005
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9  * Last modified:
10  * $Date: 2010-04-08 12:35:31 +0200 (Thu, 08 Apr 2010) $ by $Author: schulte $
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37 
38 #include "test/set.hh"
39 
40 using namespace Gecode;
41 
42 namespace Test { namespace Set {
43 
45  namespace Convex {
46 
52 
53  static IntSet ds_33(-4,4);
54 
56  class Convex : public SetTest {
57  public:
59  Convex(const char* t)
60  : SetTest(t,1,ds_33,false) {}
62  virtual bool solution(const SetAssignment& x) const {
63  CountableSetRanges xr0(x.lub, x[0]);
64  if (!xr0())
65  return true;
66  ++xr0;
67  if (!xr0())
68  return true;
69  return false;
70  }
72  virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
73  Gecode::convex(home, x[0]);
74  }
75  };
76  Convex _convex("Convex::Convex");
77 
79  class ConvexHull : public SetTest {
80  public:
82  ConvexHull(const char* t)
83  : SetTest(t,2,ds_33,false) {}
85  virtual bool solution(const SetAssignment& x) const {
86  CountableSetRanges xr0(x.lub, x[0]);
87  CountableSetRanges xr1(x.lub, x[1]);
88 
89  if (!xr0())
90  return !xr1();
91 
92  int x0min = xr0.min();
93  int x0max = xr0.max();
94  ++xr0;
95  if (!xr0()) {
96  if (!xr1()) return false;
97  if (x0min != xr1.min()) return false;
98  int x1max = Gecode::Set::Limits::min;
99  while (xr1()) { x1max = xr1.max(); ++xr1;}
100  if (x0max != x1max) return false;
101  return true;
102  }
103  return false;
104  }
106  virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
107  Gecode::convex(home, x[1], x[0]);
108  }
109  };
110  ConvexHull _convexhull("Convex::ConvexHull");
111 
113  class ConvexHullS : public SetTest {
114  public:
116  ConvexHullS(const char* t)
117  : SetTest(t,1,ds_33,false) {}
119  virtual bool solution(const SetAssignment& x) const {
120  CountableSetRanges xr0(x.lub, x[0]);
121  if (!xr0())
122  return true;
123  ++xr0;
124  if (!xr0())
125  return true;
126  return false;
127  }
129  virtual void post(Space& home, SetVarArray& x, IntVarArray&) {
130  Gecode::convex(home, x[0], x[0]);
131  }
132  };
133  ConvexHullS _convexhulls("Convex::Sharing::ConvexHullS");
134 
136 
137 }}}
138 
139 // STATISTICS: test-set