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set.hpp
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2 /*
3  * Main authors:
4  * Denys Duchier <denys.duchier@univ-orleans.fr>
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6  * Copyright:
7  * Denys Duchier, 2011
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9  * Last modified:
10  * $Date: 2011-11-03 11:52:07 +0100 (Thu, 03 Nov 2011) $ by $Author: tack $
11  * $Revision: 12452 $
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37 
38 namespace Gecode { namespace Set { namespace Channel {
39 
40  template <typename View>
45  : Propagator(home), xs(xs0), ys(ys0)
46  {
47  for (int i=xs.size(); i--;)
48  xs[i].initCache(home,IntSet::empty,IntSet(0,ys.size()-1));
49  for (int i=ys.size(); i--;)
50  ys[i].initCache(home,IntSet::empty,IntSet(0,xs.size()-1));
51  xs.subscribe(home,*this, PC_SET_ANY);
52  ys.subscribe(home,*this, PC_SET_ANY);
53  }
54 
55  template <typename View>
58  : Propagator(home, share, p)
59  {
60  xs.update(home, share, p.xs);
61  ys.update(home, share, p.ys);
62  }
63 
64  template <typename View>
69  {
70  int xssize = xs.size();
71  for (int i=ys.size(); i--;)
72  {
73  GECODE_ME_CHECK(ys[i].exclude(home, xssize, Limits::max));
74  GECODE_ME_CHECK(ys[i].exclude(home, Limits::min, -1));
75  }
76  int yssize = ys.size();
77  for (int i=xs.size(); i--;)
78  {
79  GECODE_ME_CHECK(xs[i].exclude(home, yssize, Limits::max));
80  GECODE_ME_CHECK(xs[i].exclude(home, Limits::min, -1));
81  }
82  (void) new (home) ChannelSet(home,xs,ys);
83  return ES_OK;
84  }
85 
86  template <typename View>
87  PropCost
89  {
90  return PropCost::quadratic(PropCost::HI, xs.size()+ys.size());
91  }
92 
93  template <typename View>
94  forceinline size_t
96  {
97  xs.cancel(home, *this, PC_SET_ANY);
98  ys.cancel(home, *this, PC_SET_ANY);
99  (void) Propagator::dispose(home);
100  return sizeof(*this);
101  }
102 
103  template <typename View>
104  Actor*
105  ChannelSet<View>::copy(Space& home, bool share)
106  {
107  return new (home) ChannelSet(home,share,*this);
108  }
109 
110  template <typename View>
111  ExecStatus
113  {
114  int assigned = 0;
115  bool again = true;
116  while (again)
117  {
118  assigned = 0;
119  again = false;
120  for (int i=xs.size(); i--;)
121  {
122  if (xs[i].assigned())
123  ++assigned;
124  if (xs[i].glbModified())
125  {
126  GlbDiffRanges<View> xilb(xs[i]);
128  for (;dv();++dv)
129  GECODE_ME_CHECK(ys[dv.val()].include(home,i));
130  xs[i].cacheGlb(home);
131  again = true;
132  }
133  if (xs[i].lubModified())
134  {
135  LubDiffRanges<View> xiub(xs[i]);
137  for (;dv();++dv)
138  GECODE_ME_CHECK(ys[dv.val()].exclude(home,i));
139  xs[i].cacheLub(home);
140  again = true;
141  }
142  }
143  for (int i=ys.size(); i--;)
144  {
145  if (ys[i].assigned())
146  ++assigned;
147  if (ys[i].glbModified())
148  {
149  GlbDiffRanges<View> yilb(ys[i]);
151  for (;dv();++dv)
152  GECODE_ME_CHECK(xs[dv.val()].include(home,i));
153  ys[i].cacheGlb(home);
154  again = true;
155  }
156  if (ys[i].lubModified())
157  {
158  LubDiffRanges<View> yiub(ys[i]);
160  for (;dv();++dv)
161  GECODE_ME_CHECK(xs[dv.val()].exclude(home,i));
162  ys[i].cacheLub(home);
163  again = true;
164  }
165  }
166  }
167 
168  return (assigned == xs.size()+ys.size()) ? home.ES_SUBSUMED(*this) : ES_FIX;
169  }
170 }}}
171 
172 // STATISTICS: set-prop