1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the terms 7 // of the GNU General Public License as published by the Free Software 8 // Foundation; either version 3, or (at your option) any later 9 // version. 10 11 // This library is distributed in the hope that it will be useful, but 12 // WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 // General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 26 27 // Permission to use, copy, modify, sell, and distribute this software 28 // is hereby granted without fee, provided that the above copyright 29 // notice appears in all copies, and that both that copyright notice 30 // and this permission notice appear in supporting documentation. None 31 // of the above authors, nor IBM Haifa Research Laboratories, make any 32 // representation about the suitability of this software for any 33 // purpose. It is provided "as is" without express or implied 34 // warranty. 35 36 /** 37 * @file mod_based_range_hashing.hpp 38 * Contains a range hashing policy base. 39 */ 40 41 #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP 42 #define PB_DS_MOD_BASED_RANGE_HASHING_HPP 43 44 namespace __gnu_pbds 45 { 46 47 namespace detail 48 { 49 50 #define PB_DS_CLASS_T_DEC \ 51 template<typename Size_Type> 52 53 #define PB_DS_CLASS_C_DEC \ 54 mod_based_range_hashing< \ 55 Size_Type> 56 57 template<typename Size_Type> 58 class mod_based_range_hashing 59 { 60 protected: 61 typedef Size_Type size_type; 62 63 protected: 64 void 65 swap(PB_DS_CLASS_C_DEC& other); 66 67 void 68 notify_resized(size_type size); 69 70 inline size_type 71 range_hash(size_type hash) const; 72 73 private: 74 size_type m_size; 75 }; 76 77 PB_DS_CLASS_T_DEC 78 void 79 PB_DS_CLASS_C_DEC:: 80 swap(PB_DS_CLASS_C_DEC& other) 81 { 82 std::swap(m_size, other.m_size); 83 } 84 85 PB_DS_CLASS_T_DEC 86 void 87 PB_DS_CLASS_C_DEC:: 88 notify_resized(size_type size) 89 { 90 m_size = size; 91 } 92 93 PB_DS_CLASS_T_DEC 94 inline typename PB_DS_CLASS_C_DEC::size_type 95 PB_DS_CLASS_C_DEC:: 96 range_hash(size_type hash) const 97 { 98 return (hash % m_size); 99 } 100 101 #undef PB_DS_CLASS_T_DEC 102 #undef PB_DS_CLASS_C_DEC 103 104 } // namespace detail 105 106 } // namespace __gnu_pbds 107 108 #endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP 109
