comb-ptr-flag.hpp
Go to the documentation of this file.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, 2003 00008 * 00009 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 namespace Gecode { namespace Int { namespace ViewValGraph { 00035 00036 template<class T> 00037 forceinline 00038 CombPtrFlag<T>::CombPtrFlag(T* p1, T* p2) 00039 : cpf(reinterpret_cast<ptrdiff_t>(p1) ^ reinterpret_cast<ptrdiff_t>(p2)) {} 00040 00041 template<class T> 00042 forceinline T* 00043 CombPtrFlag<T>::ptr(T* p) const { 00044 return reinterpret_cast<T*>((cpf&~1) ^ reinterpret_cast<ptrdiff_t>(p)); 00045 } 00046 00047 template<class T> 00048 forceinline int 00049 CombPtrFlag<T>::is_set(void) const { 00050 return static_cast<int>(cpf&1); 00051 } 00052 00053 template<class T> 00054 forceinline void 00055 CombPtrFlag<T>::set(void) { 00056 cpf |= 1; 00057 } 00058 00059 template<class T> 00060 forceinline void 00061 CombPtrFlag<T>::unset(void) { 00062 cpf &= ~1; 00063 } 00064 00065 template<class T> 00066 forceinline void 00067 CombPtrFlag<T>::init(T* p1, T* p2) { 00068 cpf = reinterpret_cast<ptrdiff_t>(p1) ^ reinterpret_cast<ptrdiff_t>(p2); 00069 } 00070 00071 }}} 00072 00073 // STATISTICS: int-prop 00074