set-expr.hpp
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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 * 00006 * Copyright: 00007 * Guido Tack, 2010 00008 * 00009 * Last modified: 00010 * $Date: 2010-07-14 20:32:01 +0200 (Wed, 14 Jul 2010) $ by $Author: schulte $ 00011 * $Revision: 11195 $ 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 #ifdef GECODE_HAS_SET_VARS 00039 00040 namespace Gecode { 00041 00042 /* 00043 * Operations for expressions 00044 * 00045 */ 00046 forceinline 00047 SetExpr::Node::Node(void) : use(1) {} 00048 00049 forceinline void* 00050 SetExpr::Node::operator new(size_t size) { 00051 return heap.ralloc(size); 00052 } 00053 forceinline void 00054 SetExpr::Node::operator delete(void* p, size_t) { 00055 heap.rfree(p); 00056 } 00057 00058 forceinline 00059 SetExpr::SetExpr(void) : n(NULL) {} 00060 00061 forceinline 00062 SetExpr::SetExpr(const SetExpr& e) : n(e.n) { 00063 n->use++; 00064 } 00065 00066 forceinline 00067 SetExpr::SetExpr(const SetVar& x) : n(new Node) { 00068 n->same = 1; 00069 n->t = NT_VAR; 00070 n->l = NULL; 00071 n->r = NULL; 00072 n->x = x; 00073 } 00074 00075 forceinline 00076 SetExpr::SetExpr(const IntSet& s) : n(new Node) { 00077 n->same = 1; 00078 n->t = NT_CONST; 00079 n->l = NULL; 00080 n->r = NULL; 00081 n->s = s; 00082 } 00083 00084 forceinline 00085 SetExpr::SetExpr(const LinExpr& e) : n(new Node) { 00086 n->same = 1; 00087 n->t = NT_LEXP; 00088 n->l = NULL; 00089 n->r = NULL; 00090 n->e = e; 00091 } 00092 00093 forceinline bool 00094 SetExpr::same(NodeType t0, NodeType t1) { 00095 return (t0==t1) || (t1==NT_VAR) || (t1==NT_CONST) || (t1==NT_LEXP); 00096 } 00097 00098 forceinline 00099 SetExpr::SetExpr(const SetExpr& l, NodeType t, const SetExpr& r) 00100 : n(new Node) { 00101 int ls = same(t,l.n->t) ? l.n->same : 1; 00102 int rs = same(t,r.n->t) ? r.n->same : 1; 00103 n->same = ls+rs; 00104 n->t = t; 00105 n->l = l.n; 00106 n->l->use++; 00107 n->r = r.n; 00108 n->r->use++; 00109 } 00110 00111 forceinline 00112 SetExpr::SetExpr(const SetExpr& l, NodeType t) { 00113 (void) t; 00114 assert(t == NT_CMPL); 00115 if (l.n->t == NT_CMPL) { 00116 n = l.n->l; 00117 n->use++; 00118 } else { 00119 n = new Node; 00120 n->same = 1; 00121 n->t = NT_CMPL; 00122 n->l = l.n; 00123 n->l->use++; 00124 n->r = NULL; 00125 } 00126 } 00127 00128 inline SetVar 00129 SetExpr::post(Home home) const { 00130 Region r(home); 00131 SetVar s(home,IntSet::empty, 00132 IntSet(Set::Limits::min,Set::Limits::max)); 00133 NNF::nnf(r,n,false)->post(home,SRT_EQ,s); 00134 return s; 00135 } 00136 00137 inline void 00138 SetExpr::post(Home home, SetRelType srt, const SetExpr& e) const { 00139 Region r(home); 00140 return NNF::nnf(r,n,false)->post(home,srt,NNF::nnf(r,e.n,false)); 00141 } 00142 inline void 00143 SetExpr::post(Home home, BoolVar b, bool t, 00144 SetRelType srt, const SetExpr& e) const { 00145 Region r(home); 00146 return NNF::nnf(r,n,false)->post(home,b,t,srt,NNF::nnf(r,e.n,false)); 00147 } 00148 00149 } 00150 00151 #endif 00152 00153 // STATISTICS: minimodel-any