1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License 17 // along with this library; see the file COPYING. If not, write to 18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19 // MA 02111-1307, USA. 20 21 // As a special exception, you may use this file as part of a free 22 // software library without restriction. Specifically, if other files 23 // instantiate templates or use macros or inline functions from this 24 // file, or you compile this file and link it with other files to 25 // produce an executable, this file does not by itself cause the 26 // resulting executable to be covered by the GNU General Public 27 // License. This exception does not however invalidate any other 28 // reasons why the executable file might be covered by the GNU General 29 // Public License. 30 31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33 // Permission to use, copy, modify, sell, and distribute this software 34 // is hereby granted without fee, provided that the above copyright 35 // notice appears in all copies, and that both that copyright notice 36 // and this permission notice appear in supporting documentation. None 37 // of the above authors, nor IBM Haifa Research Laboratories, make any 38 // representation about the suitability of this software for any 39 // purpose. It is provided "as is" without express or implied 40 // warranty. 41 42 /** 43 * @file mod_based_range_hashing.hpp 44 * Contains a range hashing policy base. 45 */ 46 47 #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP 48 #define PB_DS_MOD_BASED_RANGE_HASHING_HPP 49 50 namespace pb_ds 51 { 52 53 namespace detail 54 { 55 56 #define PB_DS_CLASS_T_DEC \ 57 template<typename Size_Type> 58 59 #define PB_DS_CLASS_C_DEC \ 60 mod_based_range_hashing< \ 61 Size_Type> 62 63 template<typename Size_Type> 64 class mod_based_range_hashing 65 { 66 protected: 67 typedef Size_Type size_type; 68 69 protected: 70 void 71 swap(PB_DS_CLASS_C_DEC& other); 72 73 void 74 notify_resized(size_type size); 75 76 inline size_type 77 range_hash(size_type hash) const; 78 79 private: 80 size_type m_size; 81 }; 82 83 PB_DS_CLASS_T_DEC 84 void 85 PB_DS_CLASS_C_DEC:: swap(PB_DS_CLASS_C_DEC & other)86 swap(PB_DS_CLASS_C_DEC& other) 87 { 88 std::swap(m_size, other.m_size); 89 } 90 91 PB_DS_CLASS_T_DEC 92 void 93 PB_DS_CLASS_C_DEC:: notify_resized(size_type size)94 notify_resized(size_type size) 95 { 96 m_size = size; 97 } 98 99 PB_DS_CLASS_T_DEC 100 inline typename PB_DS_CLASS_C_DEC::size_type 101 PB_DS_CLASS_C_DEC:: range_hash(size_type hash) const102 range_hash(size_type hash) const 103 { 104 return (hash % m_size); 105 } 106 107 #undef PB_DS_CLASS_T_DEC 108 #undef PB_DS_CLASS_C_DEC 109 110 } // namespace detail 111 112 } // namespace pb_ds 113 114 #endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP 115