Something went wrong. Try again.
This repository has no description
Something went wrong. Try again.
4.2 kB · 135 lines
C++
at develop
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Christian Schulte <schulte@gecode.org> * * Copyright: * Christian Schulte, 2007 * * 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. * */
namespace Gecode { namespace Int { namespace Circuit {
/* * The actual propagator * */ template<class View, class Offset> forceinline Dom<View,Offset>::Dom(Home home, ViewArray<View>& x, Offset& o) : Base<View,Offset>(home,x,o) {}
template<class View, class Offset> forceinline Dom<View,Offset>::Dom(Space& home, Dom<View,Offset>& p) : Base<View,Offset>(home,p) {}
template<class View, class Offset> Actor* Dom<View,Offset>::copy(Space& home) { return new (home) Dom<View,Offset>(home,*this); }
template<class View, class Offset> PropCost Dom<View,Offset>::cost(const Space&, const ModEventDelta& med) const { if (View::me(med) == Int::ME_INT_VAL) return PropCost::linear(PropCost::LO, x.size()); else return PropCost::quadratic(PropCost::HI, x.size()); }
template<class View, class Offset> void Dom<View,Offset>::reschedule(Space& home) { for (int i=0; i<y.size(); i++) if (y[i].assigned()) { View::schedule(home, *this, ME_INT_VAL); return; } View::schedule(home, *this, ME_INT_DOM); }
template<class View, class Offset> ExecStatus Dom<View,Offset>::propagate(Space& home, const ModEventDelta& med) { if (View::me(med) == Int::ME_INT_VAL) { GECODE_ES_CHECK((Int::Distinct::prop_val<View,true>(home,y))); ExecStatus escv = connected(home); if (escv != ES_FIX) return escv; if (y.size() < 2) return home.ES_SUBSUMED(*this); return home.ES_FIX_PARTIAL(*this,View::med(Int::ME_INT_DOM)); }
if (dc.available()) { GECODE_ES_CHECK(dc.sync()); } else { GECODE_ES_CHECK(dc.init(home,y)); } bool assigned; GECODE_ES_CHECK(dc.propagate(home,assigned));
ExecStatus esc = connected(home); if (esc != ES_FIX) return esc;
// Elminiate assigned views from y, as they have been assigned // and propagated by domain consistent propagation. This is required // as we need to know how many assigned views actually exist. if (assigned) for (int i=y.size(); i--; ) if (y[i].assigned()) y.move_lst(i);
return path(home); }
template<class View, class Offset> ExecStatus Dom<View,Offset>::post(Home home, ViewArray<View>& x, Offset& o) { int n = x.size(); if (n == 1) { GECODE_ME_CHECK(o(x[0]).eq(home,0)); } else if (n == 2) { GECODE_ME_CHECK(o(x[0]).eq(home,1)); GECODE_ME_CHECK(o(x[1]).eq(home,0)); } else { for (int i=0; i<n; i++) { GECODE_ME_CHECK(o(x[i]).gq(home,0)); GECODE_ME_CHECK(o(x[i]).le(home,n)); GECODE_ME_CHECK(o(x[i]).nq(home,i)); } (void) new (home) Dom<View,Offset>(home,x,o); } return ES_OK; }
}}}
// STATISTICS: int-prop