pair.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2009 00008 * 00009 * Last modified: 00010 * $Date: 2009-10-29 14:58:00 +0100 (Thu, 29 Oct 2009) $ by $Author: schulte $ 00011 * $Revision: 10000 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #include <gecode/int/rel.hh> 00039 00040 namespace Gecode { namespace Int { namespace Element { 00041 00042 forceinline 00043 Pair::Pair(Home home, IntView x0, IntView x1, IntView x2, int w0) 00044 : TernaryPropagator<IntView,PC_INT_DOM>(home,x0,x1,x2), w(w0) {} 00045 00046 inline ExecStatus 00047 Pair::post(Home home, IntView x0, IntView x1, IntView x2, 00048 int w, int h) { 00049 GECODE_ME_CHECK(x0.gq(home,0)); GECODE_ME_CHECK(x0.le(home,w)); 00050 GECODE_ME_CHECK(x1.gq(home,0)); GECODE_ME_CHECK(x1.le(home,h)); 00051 GECODE_ME_CHECK(x2.gq(home,0)); GECODE_ME_CHECK(x2.le(home,w*h)); 00052 if (x0.assigned() && x1.assigned()) { 00053 GECODE_ME_CHECK(x2.eq(home,x0.val()+w*x1.val())); 00054 } else if (x1.assigned()) { 00055 OffsetView x0x1w(x0,x1.val()*w); 00056 return Rel::EqDom<OffsetView,IntView>::post(home,x0x1w,x2); 00057 } else if (x2.assigned()) { 00058 GECODE_ME_CHECK(x0.eq(home,x2.val() % w)); 00059 GECODE_ME_CHECK(x1.eq(home,static_cast<int>(x2.val() / w))); 00060 } else { 00061 assert(!shared(x0,x2) && !shared(x1,x2)); 00062 (void) new (home) Pair(home,x0,x1,x2,w); 00063 } 00064 return ES_OK; 00065 } 00066 00067 forceinline 00068 Pair::Pair(Space& home, bool share, Pair& p) 00069 : TernaryPropagator<IntView,PC_INT_DOM>(home,share,p), w(p.w) {} 00070 00071 }}} 00072 00073 // STATISTICS: int-prop 00074