00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00031 00032 // Permission to use, copy, modify, sell, and distribute this software 00033 // is hereby granted without fee, provided that the above copyright 00034 // notice appears in all copies, and that both that copyright notice and 00035 // this permission notice appear in supporting documentation. None of 00036 // the above authors, nor IBM Haifa Research Laboratories, make any 00037 // representation about the suitability of this software for any 00038 // purpose. It is provided "as is" without express or implied warranty. 00039 00045 #ifndef MOD_BASED_RANGE_HASHING_HPP 00046 #define MOD_BASED_RANGE_HASHING_HPP 00047 00048 namespace pb_assoc 00049 { 00050 00051 namespace detail 00052 { 00053 00054 #define PB_ASSOC_CLASS_T_DEC \ 00055 template<typename Size_Type> 00056 00057 #define PB_ASSOC_CLASS_C_DEC \ 00058 mod_based_range_hashing< \ 00059 Size_Type> 00060 00061 template<typename Size_Type> 00062 class mod_based_range_hashing 00063 { 00064 protected: 00065 typedef Size_Type size_type; 00066 00067 protected: 00068 void 00069 swap(PB_ASSOC_CLASS_C_DEC& r_other); 00070 00071 void 00072 notify_resized(size_type size); 00073 00074 inline size_type 00075 range_hash(size_type hash) const; 00076 00077 private: 00078 size_type m_size; 00079 }; 00080 00081 PB_ASSOC_CLASS_T_DEC 00082 void 00083 PB_ASSOC_CLASS_C_DEC:: 00084 swap(PB_ASSOC_CLASS_C_DEC& r_other) 00085 { 00086 std::swap(m_size, r_other.m_size); 00087 } 00088 00089 PB_ASSOC_CLASS_T_DEC 00090 void 00091 PB_ASSOC_CLASS_C_DEC:: 00092 notify_resized(size_type size) 00093 { 00094 m_size = size; 00095 } 00096 00097 PB_ASSOC_CLASS_T_DEC 00098 inline typename PB_ASSOC_CLASS_C_DEC::size_type 00099 PB_ASSOC_CLASS_C_DEC:: 00100 range_hash(size_type hash) const 00101 { 00102 return (hash % m_size); 00103 } 00104 00105 #undef PB_ASSOC_CLASS_T_DEC 00106 #undef PB_ASSOC_CLASS_C_DEC 00107 00108 } // namespace detail 00109 00110 } // namespace pb_assoc 00111 00112 #endif // #ifndef MOD_BASED_RANGE_HASHING_HPP