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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Christian Schulte <schulte@gecode.org> * * Copyright: * Christian Schulte, 2011 * * 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 NoOverlap {
template<class Box> forceinline ManProp<Box>::ManProp(Home home, Box* b, int n) : Base<Box>(home, b, n) {}
template<class Box> inline ExecStatus ManProp<Box>::post(Home home, Box* b, int n) { if (n > 1) (void) new (home) ManProp<Box>(home,b,n); return ES_OK; }
template<class Box> forceinline size_t ManProp<Box>::dispose(Space& home) { (void) Base<Box>::dispose(home); return sizeof(*this); }
template<class Box> forceinline ManProp<Box>::ManProp(Space& home, ManProp<Box>& p) : Base<Box>(home, p, p.n) {}
template<class Box> Actor* ManProp<Box>::copy(Space& home) { return new (home) ManProp<Box>(home,*this); }
template<class Box> ExecStatus ManProp<Box>::propagate(Space& home, const ModEventDelta&) { Region r;
// Number of disjoint boxes int* db = r.alloc<int>(n); for (int i=0; i<n; i++) db[i] = n-1;
// Number of boxes to be eliminated int e = 0;
for (int i=0; i<n; i++) for (int j=0; j<i; j++) if (b[i].nooverlap(b[j])) { assert(db[i] > 0); assert(db[j] > 0); if (--db[i] == 0) e++; if (--db[j] == 0) e++; continue; } else { GECODE_ES_CHECK(b[i].nooverlap(home,b[j])); }
if (e == n) return home.ES_SUBSUMED(*this);
{ int i = n-1; while (e > 0) { // Eliminate boxes that do not overlap while (db[i] > 0) i--; b[i].cancel(home, *this); b[i] = b[--n]; e--; i--; } if (n < 2) return home.ES_SUBSUMED(*this); }
return ES_NOFIX; }
}}}
// STATISTICS: int-prop