bin-packing.hh
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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, 2010 00008 * 00009 * Last modified: 00010 * $Date: 2010-10-06 23:20:35 +0200 (Wed, 06 Oct 2010) $ by $Author: schulte $ 00011 * $Revision: 11468 $ 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 #ifndef __GECODE_INT_BIN_PACKING_HH__ 00039 #define __GECODE_INT_BIN_PACKING_HH__ 00040 00041 #include <gecode/int.hh> 00042 00048 namespace Gecode { namespace Int { namespace BinPacking { 00049 00053 class Item : public DerivedView<IntView> { 00054 protected: 00055 using DerivedView<IntView>::x; 00057 int s; 00058 public: 00060 Item(void); 00062 Item(IntView b, int s); 00063 00065 IntView bin(void) const; 00067 void bin(IntView b); 00069 int size(void) const; 00071 void size(int s); 00072 00074 void update(Space& home, bool share, Item& i); 00075 }; 00076 00078 bool same(const Item& i, const Item& j); 00080 bool before(const Item& i, const Item& j); 00081 00083 bool operator <(const Item& i, const Item& j); 00084 00085 00087 class SizeSet { 00088 protected: 00090 int n; 00092 int t; 00094 int* s; 00095 public: 00097 SizeSet(void); 00099 SizeSet(Region& region, int n_max); 00101 void add(int s); 00103 int card(void) const; 00105 int total(void) const; 00107 int operator [](int i) const; 00108 }; 00109 00111 class SizeSetMinusOne : public SizeSet { 00112 protected: 00114 int p; 00115 public: 00117 SizeSetMinusOne(void); 00119 SizeSetMinusOne(Region& region, int n); 00121 void minus(int s); 00123 int card(void) const; 00125 int total(void) const; 00127 int operator [](int i) const; 00128 }; 00129 00130 00141 class Pack : public Propagator { 00142 protected: 00144 ViewArray<OffsetView> l; 00146 ViewArray<Item> bs; 00148 int t; 00150 Pack(Home home, ViewArray<OffsetView>& l, ViewArray<Item>& bs); 00152 Pack(Space& home, bool share, Pack& p); 00153 public: 00155 GECODE_INT_EXPORT 00156 static ExecStatus post(Home home, 00157 ViewArray<OffsetView>& l, ViewArray<Item>& bs); 00159 template<class SizeSet> 00160 bool nosum(const SizeSet& s, int a, int b, int& ap, int& bp); 00162 template<class SizeSet> 00163 bool nosum(const SizeSet& s, int a, int b); 00165 GECODE_INT_EXPORT 00166 virtual ExecStatus propagate(Space& home, const ModEventDelta& med); 00168 GECODE_INT_EXPORT 00169 virtual PropCost cost(const Space& home, const ModEventDelta& med) const; 00171 GECODE_INT_EXPORT 00172 virtual Actor* copy(Space& home, bool share); 00174 virtual size_t dispose(Space& home); 00175 }; 00176 00177 }}} 00178 00179 #include <gecode/int/bin-packing/propagate.hpp> 00180 00181 #endif 00182 00183 // STATISTICS: int-prop 00184