00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00029
00030
00031
00032
00033
00034
00035
00036
00037
00038
00039
00040
00041
00042
00043 namespace Gecode { namespace Set { namespace Rel {
00044
00045 template<class View0, class View1>
00046 forceinline
00047 ReEq<View0,View1>::ReEq(Home home, View0 y0, View1 y1,
00048 Gecode::Int::BoolView y2)
00049 : Propagator(home), x0(y0), x1(y1), b(y2) {
00050 b.subscribe(home,*this, Gecode::Int::PC_INT_VAL);
00051 x0.subscribe(home,*this, PC_SET_ANY);
00052 x1.subscribe(home,*this, PC_SET_ANY);
00053 }
00054
00055 template<class View0, class View1>
00056 forceinline
00057 ReEq<View0,View1>::ReEq(Space& home, bool share, ReEq& p)
00058 : Propagator(home,share,p) {
00059 x0.update(home,share,p.x0);
00060 x1.update(home,share,p.x1);
00061 b.update(home,share,p.b);
00062 }
00063
00064 template<class View0, class View1>
00065 PropCost
00066 ReEq<View0,View1>::cost(const Space&, const ModEventDelta&) const {
00067 return PropCost::ternary(PropCost::LO);
00068 }
00069
00070 template<class View0, class View1>
00071 size_t
00072 ReEq<View0,View1>::dispose(Space& home) {
00073 assert(!home.failed());
00074 b.cancel(home,*this, Gecode::Int::PC_INT_VAL);
00075 x0.cancel(home,*this, PC_SET_ANY);
00076 x1.cancel(home,*this, PC_SET_ANY);
00077 (void) Propagator::dispose(home);
00078 return sizeof(*this);
00079 }
00080
00081 template<class View0, class View1>
00082 ExecStatus
00083 ReEq<View0,View1>::post(Home home, View0 x0, View1 x1,
00084 Gecode::Int::BoolView b) {
00085 (void) new (home) ReEq<View0,View1>(home,x0,x1,b);
00086 return ES_OK;
00087 }
00088
00089 template<class View0, class View1>
00090 Actor*
00091 ReEq<View0,View1>::copy(Space& home, bool share) {
00092 return new (home) ReEq<View0,View1>(home,share,*this);
00093 }
00094
00095 template<class View0, class View1>
00096 ExecStatus
00097 ReEq<View0,View1>::propagate(Space& home, const ModEventDelta&) {
00098 if (b.one())
00099 GECODE_REWRITE(*this,(Eq<View0,View1>::post(home(*this),x0,x1)));
00100 if (b.zero())
00101 GECODE_REWRITE(*this,(Distinct<View0,View1>::post(home(*this),x0,x1)));
00102
00103 if (x0.assigned() && x1.assigned()) {
00104
00105 GlbRanges<View0> x0lb(x0);
00106 GlbRanges<View1> x1lb(x1);
00107 for (; x0lb() && x1lb(); ++x0lb, ++x1lb) {
00108 if (x0lb.min() != x1lb.min() ||
00109 x0lb.max() != x1lb.max()) {
00110 GECODE_ME_CHECK(b.zero_none(home));
00111 return ES_SUBSUMED(*this,home);
00112 }
00113 }
00114 if (!x0lb() && !x1lb()) {
00115 GECODE_ME_CHECK(b.one_none(home));
00116 return ES_SUBSUMED(*this,home);
00117 } else {
00118 GECODE_ME_CHECK(b.zero_none(home));
00119 return ES_SUBSUMED(*this,home);
00120 }
00121 }
00122
00123
00124 if (x0.cardMin() > x1.cardMax() ||
00125 x1.cardMin() > x0.cardMax()) {
00126 GECODE_ME_CHECK(b.zero_none(home));
00127 return ES_SUBSUMED(*this,home);
00128 }
00129
00130
00131 GlbRanges<View0> x0lb(x0);
00132 LubRanges<View1> x1ub(x1);
00133 Iter::Ranges::Diff<GlbRanges<View0>, LubRanges<View1> > diff1(x0lb, x1ub);
00134 if ( diff1() ) {
00135 GECODE_ME_CHECK(b.zero_none(home));
00136 return ES_SUBSUMED(*this,home);
00137 }
00138
00139
00140 GlbRanges<View1> x1lb(x1);
00141 LubRanges<View0> x0ub(x0);
00142 Iter::Ranges::Diff<GlbRanges<View1>, LubRanges<View0> > diff2(x1lb, x0ub);
00143 if ( diff2() ) {
00144 GECODE_ME_CHECK(b.zero_none(home));
00145 return ES_SUBSUMED(*this,home);
00146 }
00147
00148 return ES_FIX;
00149 }
00150
00151 }}}
00152
00153