link-single.hpp
Go to the documentation of this file.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, 2007 00008 * 00009 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 namespace Gecode { namespace Int { namespace Channel { 00035 00036 forceinline 00037 LinkSingle::LinkSingle(Home home, BoolView x0, IntView x1) 00038 : MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL> 00039 (home,x0,x1) {} 00040 00041 forceinline ExecStatus 00042 LinkSingle::post(Home home, BoolView x0, IntView x1) { 00043 if (x1.assigned()) { 00044 switch (x1.val()) { 00045 case 0: 00046 GECODE_ME_CHECK(x0.zero(home)); break; 00047 case 1: 00048 GECODE_ME_CHECK(x0.one(home)); break; 00049 default: 00050 return ES_FAILED; 00051 } 00052 } else if (x0.zero()) { 00053 GECODE_ME_CHECK(x1.eq(home,0)); 00054 } else if (x0.one()) { 00055 GECODE_ME_CHECK(x1.eq(home,1)); 00056 } else { 00057 GECODE_ME_CHECK(x1.gq(home,0)); 00058 GECODE_ME_CHECK(x1.lq(home,1)); 00059 (void) new (home) LinkSingle(home,x0,x1); 00060 } 00061 return ES_OK; 00062 } 00063 00064 }}} 00065 00066 // STATISTICS: int-prop 00067