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 hash_standard_resize_policy_imp.hpp 44 * Contains a resize policy implementation. 45 */ 46 47#define PB_DS_STATIC_ASSERT(UNIQUE, E) \ 48 typedef detail::static_assert_dumclass<sizeof(detail::static_assert<(bool)(E)>)> UNIQUE##static_assert_type 49 50PB_DS_CLASS_T_DEC 51PB_DS_CLASS_C_DEC:: 52hash_standard_resize_policy() 53: m_size(Size_Policy::get_nearest_larger_size(1)) 54{ trigger_policy_base::notify_externally_resized(m_size); } 55 56PB_DS_CLASS_T_DEC 57PB_DS_CLASS_C_DEC:: 58hash_standard_resize_policy(const Size_Policy& r_size_policy) 59: Size_Policy(r_size_policy), m_size(Size_Policy::get_nearest_larger_size(1)) 60{ trigger_policy_base::notify_externally_resized(m_size); } 61 62PB_DS_CLASS_T_DEC 63PB_DS_CLASS_C_DEC:: 64hash_standard_resize_policy(const Size_Policy& r_size_policy, 65 const Trigger_Policy& r_trigger_policy) 66: Size_Policy(r_size_policy), Trigger_Policy(r_trigger_policy), 67 m_size(Size_Policy::get_nearest_larger_size(1)) 68{ trigger_policy_base::notify_externally_resized(m_size); } 69 70PB_DS_CLASS_T_DEC 71PB_DS_CLASS_C_DEC:: 72~hash_standard_resize_policy() 73{ } 74 75PB_DS_CLASS_T_DEC 76void 77PB_DS_CLASS_C_DEC:: 78swap(PB_DS_CLASS_C_DEC& other) 79{ 80 trigger_policy_base::swap(other); 81 size_policy_base::swap(other); 82 std::swap(m_size, other.m_size); 83} 84 85PB_DS_CLASS_T_DEC 86inline void 87PB_DS_CLASS_C_DEC:: 88notify_find_search_start() 89{ trigger_policy_base::notify_find_search_start(); } 90 91PB_DS_CLASS_T_DEC 92inline void 93PB_DS_CLASS_C_DEC:: 94notify_find_search_collision() 95{ trigger_policy_base::notify_find_search_collision(); } 96 97PB_DS_CLASS_T_DEC 98inline void 99PB_DS_CLASS_C_DEC:: 100notify_find_search_end() 101{ trigger_policy_base::notify_find_search_end(); } 102 103PB_DS_CLASS_T_DEC 104inline void 105PB_DS_CLASS_C_DEC:: 106notify_insert_search_start() 107{ trigger_policy_base::notify_insert_search_start(); } 108 109PB_DS_CLASS_T_DEC 110inline void 111PB_DS_CLASS_C_DEC:: 112notify_insert_search_collision() 113{ trigger_policy_base::notify_insert_search_collision(); } 114 115PB_DS_CLASS_T_DEC 116inline void 117PB_DS_CLASS_C_DEC:: 118notify_insert_search_end() 119{ trigger_policy_base::notify_insert_search_end(); } 120 121PB_DS_CLASS_T_DEC 122inline void 123PB_DS_CLASS_C_DEC:: 124notify_erase_search_start() 125{ trigger_policy_base::notify_erase_search_start(); } 126 127PB_DS_CLASS_T_DEC 128inline void 129PB_DS_CLASS_C_DEC:: 130notify_erase_search_collision() 131{ trigger_policy_base::notify_erase_search_collision(); } 132 133PB_DS_CLASS_T_DEC 134inline void 135PB_DS_CLASS_C_DEC:: 136notify_erase_search_end() 137{ trigger_policy_base::notify_erase_search_end(); } 138 139PB_DS_CLASS_T_DEC 140inline void 141PB_DS_CLASS_C_DEC:: 142notify_inserted(size_type num_e) 143{ trigger_policy_base::notify_inserted(num_e); } 144 145PB_DS_CLASS_T_DEC 146inline void 147PB_DS_CLASS_C_DEC:: 148notify_erased(size_type num_e) 149{ trigger_policy_base::notify_erased(num_e); } 150 151PB_DS_CLASS_T_DEC 152void 153PB_DS_CLASS_C_DEC:: 154notify_cleared() 155{ trigger_policy_base::notify_cleared(); } 156 157PB_DS_CLASS_T_DEC 158inline bool 159PB_DS_CLASS_C_DEC:: 160is_resize_needed() const 161{ return trigger_policy_base::is_resize_needed(); } 162 163PB_DS_CLASS_T_DEC 164typename PB_DS_CLASS_C_DEC::size_type 165PB_DS_CLASS_C_DEC:: 166get_new_size(size_type size, size_type num_used_e) const 167{ 168 if (trigger_policy_base::is_grow_needed(size, num_used_e)) 169 return size_policy_base::get_nearest_larger_size(size); 170 return size_policy_base::get_nearest_smaller_size(size); 171} 172 173PB_DS_CLASS_T_DEC 174void 175PB_DS_CLASS_C_DEC:: 176notify_resized(size_type new_size) 177{ 178 trigger_policy_base::notify_resized(new_size); 179 m_size = new_size; 180} 181 182PB_DS_CLASS_T_DEC 183inline typename PB_DS_CLASS_C_DEC::size_type 184PB_DS_CLASS_C_DEC:: 185get_actual_size() const 186{ 187 PB_DS_STATIC_ASSERT(access, external_size_access); 188 return m_size; 189} 190 191PB_DS_CLASS_T_DEC 192void 193PB_DS_CLASS_C_DEC:: 194resize(size_type new_size) 195{ 196 PB_DS_STATIC_ASSERT(access, external_size_access); 197 size_type actual_size = size_policy_base::get_nearest_larger_size(1); 198 while (actual_size < new_size) 199 { 200 const size_type pot = size_policy_base::get_nearest_larger_size(actual_size); 201 202 if (pot == actual_size && pot < new_size) 203 __throw_resize_error(); 204 actual_size = pot; 205 } 206 207 if (actual_size > 0) 208 --actual_size; 209 210 const size_type old_size = m_size; 211 try 212 { 213 do_resize(actual_size - 1); 214 } 215 catch(insert_error& ) 216 { 217 m_size = old_size; 218 __throw_resize_error(); 219 } 220 catch(...) 221 { 222 m_size = old_size; 223 __throw_exception_again; 224 } 225} 226 227PB_DS_CLASS_T_DEC 228void 229PB_DS_CLASS_C_DEC:: 230do_resize(size_type) 231{ 232 // Do nothing 233} 234 235PB_DS_CLASS_T_DEC 236Trigger_Policy& 237PB_DS_CLASS_C_DEC:: 238get_trigger_policy() 239{ return *this; } 240 241PB_DS_CLASS_T_DEC 242const Trigger_Policy& 243PB_DS_CLASS_C_DEC:: 244get_trigger_policy() const 245{ return *this; } 246 247PB_DS_CLASS_T_DEC 248Size_Policy& 249PB_DS_CLASS_C_DEC:: 250get_size_policy() 251{ return *this; } 252 253PB_DS_CLASS_T_DEC 254const Size_Policy& 255PB_DS_CLASS_C_DEC:: 256get_size_policy() const 257{ return *this; } 258 259#undef PB_DS_STATIC_ASSERT 260 261