element.cpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Guido Tack <tack@gecode.org> 00005 * Christian Schulte <schulte@gecode.org> 00006 * 00007 * Copyright: 00008 * Guido Tack, 2004 00009 * Christian Schulte, 2004 00010 * 00011 * Last modified: 00012 * $Date: 2010-06-07 14:18:14 +0200 (Mon, 07 Jun 2010) $ by $Author: tack $ 00013 * $Revision: 11048 $ 00014 * 00015 * This file is part of Gecode, the generic constraint 00016 * development environment: 00017 * http://www.gecode.org 00018 * 00019 * Permission is hereby granted, free of charge, to any person obtaining 00020 * a copy of this software and associated documentation files (the 00021 * "Software"), to deal in the Software without restriction, including 00022 * without limitation the rights to use, copy, modify, merge, publish, 00023 * distribute, sublicense, and/or sell copies of the Software, and to 00024 * permit persons to whom the Software is furnished to do so, subject to 00025 * the following conditions: 00026 * 00027 * The above copyright notice and this permission notice shall be 00028 * included in all copies or substantial portions of the Software. 00029 * 00030 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00031 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00032 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00033 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00034 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00035 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00036 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00037 * 00038 */ 00039 00040 #include <gecode/set/element.hh> 00041 00042 namespace Gecode { 00043 00044 namespace Int { namespace Element { 00045 template<> 00047 class ViewToVarArg<Gecode::Set::ConstSetView> { 00048 public: 00049 typedef IntSetArgs argtype; 00050 }; 00051 }} 00052 00053 using namespace Gecode::Set; 00054 00055 void 00056 element(Home home, SetOpType op, const SetVarArgs& x, SetVar y, SetVar z, 00057 const IntSet& universe) { 00058 if (home.failed()) return; 00059 00060 switch (op) { 00061 case SOT_DUNION: 00062 { 00063 Set::Element::ElementDisjoint<SetView,SetView>::IdxViewArray 00064 iv(home, x); 00065 GECODE_ES_FAIL((Element::ElementDisjoint<SetView,SetView>:: 00066 post(home,iv,y))); 00067 } 00068 // fall through 00069 case SOT_UNION: 00070 { 00071 Set::Element::ElementUnion<SetView,SetView>::IdxViewArray iv(home, x); 00072 GECODE_ES_FAIL( 00073 (Element::ElementUnion<SetView,SetView>:: 00074 post(home,z,iv,y))); 00075 } 00076 break; 00077 case SOT_INTER: 00078 { 00079 Set::Element::ElementIntersection<SetView,SetView>::IdxViewArray 00080 iv(home, x); 00081 GECODE_ES_FAIL( 00082 (Element::ElementIntersection<SetView,SetView>:: 00083 post(home,z,iv,y,universe))); 00084 } 00085 break; 00086 case SOT_MINUS: 00087 throw IllegalOperation("Set::element"); 00088 break; 00089 default: 00090 throw UnknownOperation("Set::element"); 00091 } 00092 } 00093 00094 void 00095 element(Home home, SetOpType op, const IntSetArgs& x, SetVar y, SetVar z, 00096 const IntSet& universe) { 00097 if (home.failed()) return; 00098 00099 switch (op) { 00100 case SOT_DUNION: 00101 { 00102 Set::Element::ElementDisjoint<ConstSetView,SetView>::IdxViewArray 00103 iv(home, x.size()); 00104 for (int i=x.size(); i--;) { 00105 iv[i].idx = i; iv[i].view = ConstSetView(home, x[i]); 00106 } 00107 GECODE_ES_FAIL((Element::ElementDisjoint<ConstSetView,SetView>:: 00108 post(home,iv,y))); 00109 } 00110 // fall through 00111 case SOT_UNION: 00112 { 00113 SharedArray<IntSet> s(x.size()); 00114 for (int i=s.size(); i--;) 00115 new (&s[i]) IntSet(x[i]); 00116 GECODE_ES_FAIL( 00117 (Element::ElementUnionConst<SetView,SetView>:: 00118 post(home,z,s,y))); 00119 } 00120 break; 00121 case SOT_INTER: 00122 { 00123 Set::Element::ElementIntersection<ConstSetView,SetView>::IdxViewArray 00124 iv(home, x.size()); 00125 for (int i=x.size(); i--;) { 00126 iv[i].idx = i; iv[i].view = ConstSetView(home, x[i]); 00127 } 00128 GECODE_ES_FAIL( 00129 (Element::ElementIntersection<ConstSetView,SetView>:: 00130 post(home,z,iv,y,universe))); 00131 } 00132 break; 00133 case SOT_MINUS: 00134 throw IllegalOperation("Set::element"); 00135 break; 00136 default: 00137 throw UnknownOperation("Set::element"); 00138 } 00139 00140 } 00141 00142 void 00143 element(Home home, const SetVarArgs& x, IntVar y, SetVar z) { 00144 if (x.size() == 0) 00145 throw Set::TooFewArguments("Set::element"); 00146 if (home.failed()) return; 00147 Set::Element::ElementUnion<SetView,SingletonView>::IdxViewArray iv(home, x); 00148 SetView zv(z); 00149 00150 Int::IntView yv(y); 00151 SingletonView single(yv); 00152 GECODE_ES_FAIL((Element::ElementUnion<SetView, 00153 SingletonView>::post(home, z, iv, single))); 00154 } 00155 00156 void 00157 element(Home home, const IntSetArgs& s, IntVar y, SetVar z) { 00158 if (s.size() == 0) 00159 throw Set::TooFewArguments("Set::element"); 00160 for (int i=s.size(); i--;) 00161 Set::Limits::check(s[i], "Set::element"); 00162 if (home.failed()) return; 00163 SetView zv(z); 00164 SharedArray<IntSet> x(s.size()); 00165 for (int i=s.size(); i--;) 00166 new (&x[i]) IntSet(s[i]); 00167 00168 Int::IntView yv(y); 00169 SingletonView single(yv); 00170 GECODE_ES_FAIL((Element::ElementUnionConst<SetView, 00171 SingletonView>::post(home, z, x, single))); 00172 } 00173 00174 00175 namespace { 00176 IntVar 00177 pair(Home home, IntVar x, int w, IntVar y, int h) { 00178 IntVar xy(home,0,w*h-1); 00179 if (Int::Element::Pair::post(home,x,y,xy,w,h) != ES_OK) 00180 home.fail(); 00181 return xy; 00182 } 00183 } 00184 00185 void 00186 element(Home home, const IntSetArgs& a, 00187 IntVar x, int w, IntVar y, int h, SetVar z) { 00188 if (a.size() == 0) 00189 throw Set::TooFewArguments("Set::element"); 00190 if (a.size() != w*h) 00191 throw Set::ArgumentSizeMismatch("Set::element"); 00192 if (home.failed()) return; 00193 element(home, a, pair(home,x,w,y,h), z); 00194 } 00195 00196 void 00197 element(Home home, const SetVarArgs& a, 00198 IntVar x, int w, IntVar y, int h, SetVar z) { 00199 if (a.size() == 0) 00200 throw Set::TooFewArguments("Set::element"); 00201 if (a.size() != w*h) 00202 throw Set::ArgumentSizeMismatch("Set::element"); 00203 if (home.failed()) return; 00204 element(home, a, pair(home,x,w,y,h), z); 00205 } 00206 00207 } 00208 00209 // STATISTICS: set-post 00210