branch.cpp
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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, 2002 00008 * 00009 * Last modified: 00010 * $Date: 2010-03-11 22:16:29 +0100 (Thu, 11 Mar 2010) $ by $Author: schulte $ 00011 * $Revision: 10418 $ 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/branch.hh> 00039 00040 namespace Gecode { 00041 00042 void 00043 assign(Home home, const IntVarArgs& x, IntAssign vals, 00044 const ValBranchOptions& o_vals) { 00045 using namespace Int; 00046 if (home.failed()) return; 00047 ViewArray<IntView> xv(home,x); 00048 ViewSelNone<IntView> v(home,VarBranchOptions::def); 00049 switch (vals) { 00050 case INT_ASSIGN_MIN: 00051 { 00052 Branch::AssignValMin<IntView> a(home,o_vals); 00053 ViewValBrancher 00054 <ViewSelNone<IntView>,Branch::AssignValMin<IntView> > 00055 ::post(home,xv,v,a); 00056 } 00057 break; 00058 case INT_ASSIGN_MED: 00059 { 00060 Branch::AssignValMed<IntView> a(home,o_vals); 00061 ViewValBrancher 00062 <ViewSelNone<IntView>,Branch::AssignValMed<IntView> > 00063 ::post(home,xv,v,a); 00064 } 00065 break; 00066 case INT_ASSIGN_MAX: 00067 { 00068 Branch::AssignValMin<MinusView> a(home,o_vals); 00069 ViewValBrancher 00070 <ViewSelNone<IntView>,Branch::AssignValMin<MinusView> > 00071 ::post(home,xv,v,a); 00072 } 00073 break; 00074 case INT_ASSIGN_RND: 00075 { 00076 Branch::AssignValRnd<IntView> a(home,o_vals); 00077 ViewValBrancher 00078 <ViewSelNone<IntView>,Branch::AssignValRnd<IntView> > 00079 ::post(home,xv,v,a); 00080 } 00081 break; 00082 default: 00083 throw UnknownBranching("Int::assign"); 00084 } 00085 } 00086 00087 void 00088 assign(Home home, const BoolVarArgs& x, IntAssign vals, 00089 const ValBranchOptions& o_vals) { 00090 using namespace Int; 00091 if (home.failed()) return; 00092 ViewArray<BoolView> xv(home,x); 00093 ViewSelNone<BoolView> v(home,VarBranchOptions::def); 00094 switch (vals) { 00095 case INT_ASSIGN_MIN: 00096 case INT_ASSIGN_MED: { 00097 Branch::AssignValZero<BoolView> a(home,o_vals); 00098 ViewValBrancher 00099 <ViewSelNone<BoolView>,Branch::AssignValZero<BoolView> > 00100 ::post(home,xv,v,a); 00101 } 00102 break; 00103 case INT_ASSIGN_MAX: { 00104 Branch::AssignValZero<NegBoolView> a(home,o_vals); 00105 ViewValBrancher 00106 <ViewSelNone<BoolView>,Branch::AssignValZero<NegBoolView> > 00107 ::post(home,xv,v,a); 00108 } 00109 break; 00110 case INT_ASSIGN_RND: { 00111 Branch::AssignValRnd<BoolView> a(home,o_vals); 00112 ViewValBrancher 00113 <ViewSelNone<BoolView>,Branch::AssignValRnd<BoolView> > 00114 ::post(home,xv,v,a); 00115 } 00116 break; 00117 default: 00118 throw UnknownBranching("Int::assign"); 00119 } 00120 } 00121 00122 void 00123 branch(Home home, IntVar x, IntValBranch vals, 00124 const ValBranchOptions& o_vals) { 00125 IntVarArgs xv(1); xv[0]=x; 00126 branch(home, xv, INT_VAR_NONE, vals, VarBranchOptions::def, o_vals); 00127 } 00128 00129 void 00130 branch(Home home, BoolVar x, IntValBranch vals, 00131 const ValBranchOptions& o_vals) { 00132 BoolVarArgs xv(1); xv[0]=x; 00133 branch(home, xv, INT_VAR_NONE, vals, VarBranchOptions::def, o_vals); 00134 } 00135 00136 void 00137 assign(Home home, IntVar x, IntAssign vals, 00138 const ValBranchOptions& o_vals) { 00139 IntVarArgs xv(1); xv[0]=x; 00140 assign(home, xv, vals, o_vals); 00141 } 00142 00143 void 00144 assign(Home home, BoolVar x, IntAssign vals, 00145 const ValBranchOptions& o_vals) { 00146 BoolVarArgs xv(1); xv[0]=x; 00147 assign(home, xv, vals, o_vals); 00148 } 00149 00150 } 00151 00152 // STATISTICS: int-post