values-minus.hpp
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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, 2007 00008 * 00009 * Last modified: 00010 * $Date: 2009-09-08 21:10:29 +0200 (Tue, 08 Sep 2009) $ by $Author: schulte $ 00011 * $Revision: 9692 $ 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 namespace Gecode { namespace Iter { namespace Values { 00039 00052 template<class I> 00053 class Minus { 00054 private: 00056 IsValueIter<I> _checkI; 00057 private: 00059 SharedArray<int> v; 00061 int c; 00062 public: 00064 00065 00066 Minus(void); 00068 Minus(I& i); 00070 void init(I& i); 00072 00074 00075 00076 bool operator ()(void) const; 00078 void operator ++(void); 00080 00082 00083 00084 int val(void) const; 00086 }; 00087 00088 00089 template<class I> 00090 forceinline 00091 Minus<I>::Minus(void) {} 00092 00093 template<class I> 00094 inline void 00095 Minus<I>::init(I& i) { 00096 Support::DynamicArray<int,Heap> d(heap); 00097 int n=0; 00098 while (i()) { 00099 d[n] = -i.val(); 00100 ++n; ++i; 00101 } 00102 v.init(n); 00103 for (int j=n; j--; ) 00104 v[j]=d[j]; 00105 c = n-1; 00106 } 00107 00108 template<class I> 00109 forceinline 00110 Minus<I>::Minus(I& i) { 00111 init(i); 00112 } 00113 00114 template<class I> 00115 forceinline void 00116 Minus<I>::operator ++(void) { 00117 c--; 00118 } 00119 template<class I> 00120 forceinline bool 00121 Minus<I>::operator ()(void) const { 00122 return c >= 0; 00123 } 00124 00125 template<class I> 00126 forceinline int 00127 Minus<I>::val(void) const { 00128 return v[c]; 00129 } 00130 00131 }}} 00132 00133 // STATISTICS: iter-any