hash.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 * Guido Tack <tack@gecode.org> 00006 * 00007 * Copyright: 00008 * Christian Schulte, 2018 00009 * Guido Tack, 2018 00010 * 00011 * This file is part of Gecode, the generic constraint 00012 * development environment: 00013 * http://www.gecode.org 00014 * 00015 * Permission is hereby granted, free of charge, to any person obtaining 00016 * a copy of this software and associated documentation files (the 00017 * "Software"), to deal in the Software without restriction, including 00018 * without limitation the rights to use, copy, modify, merge, publish, 00019 * distribute, sublicense, and/or sell copies of the Software, and to 00020 * permit persons to whom the Software is furnished to do so, subject to 00021 * the following conditions: 00022 * 00023 * The above copyright notice and this permission notice shall be 00024 * included in all copies or substantial portions of the Software. 00025 * 00026 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00027 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00028 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00029 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00030 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00031 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00032 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00033 * 00034 */ 00035 00036 namespace Gecode { 00037 00039 template<class T> 00040 void cmb_hash(std::size_t& seed, const T h); 00041 00042 template<class T> 00043 forceinline void 00044 cmb_hash(std::size_t& seed, const T h) { 00045 seed ^= static_cast<std::size_t>(h) 00046 + 0x9e3779b9 + (seed << 6) + (seed >> 2); 00047 } 00048 00049 } 00050 00051 // STATISTICS: support-any