mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/resize_policy/hash_standard_resize_policy_imp.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2007 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
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  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
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  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
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  40 // warranty.
  41
  42 /**
  43  * @file hash_standard_resize_policy_imp.hpp
  44  * Contains a resize policy implementation.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 PB_DS_CLASS_C_DEC::
  49 hash_standard_resize_policy()
  50 : m_size(Size_Policy::get_nearest_larger_size(1))
  51 { trigger_policy_base::notify_externally_resized(m_size); }
  52
  53 PB_DS_CLASS_T_DEC
  54 PB_DS_CLASS_C_DEC::
  55 hash_standard_resize_policy(const Size_Policy& r_size_policy)
  56 : Size_Policy(r_size_policy), m_size(Size_Policy::get_nearest_larger_size(1))
  57 { trigger_policy_base::notify_externally_resized(m_size); }
  58
  59 PB_DS_CLASS_T_DEC
  60 PB_DS_CLASS_C_DEC::
  61 hash_standard_resize_policy(const Size_Policy& r_size_policy,
  62                             const Trigger_Policy& r_trigger_policy)
  63 : Size_Policy(r_size_policy), Trigger_Policy(r_trigger_policy),
  64   m_size(Size_Policy::get_nearest_larger_size(1))
  65 { trigger_policy_base::notify_externally_resized(m_size); }
  66
  67 PB_DS_CLASS_T_DEC
  68 PB_DS_CLASS_C_DEC::
  69 ~hash_standard_resize_policy()
  70 { }
  71
  72 PB_DS_CLASS_T_DEC
  73 void
  74 PB_DS_CLASS_C_DEC::
  75 swap(PB_DS_CLASS_C_DEC& other)
  76 {
  77   trigger_policy_base::swap(other);
  78   size_policy_base::swap(other);
  79   std::swap(m_size, other.m_size);
  80 }
  81
  82 PB_DS_CLASS_T_DEC
  83 inline void
  84 PB_DS_CLASS_C_DEC::
  85 notify_find_search_start()
  86 { trigger_policy_base::notify_find_search_start(); }
  87
  88 PB_DS_CLASS_T_DEC
  89 inline void
  90 PB_DS_CLASS_C_DEC::
  91 notify_find_search_collision()
  92 { trigger_policy_base::notify_find_search_collision(); }
  93
  94 PB_DS_CLASS_T_DEC
  95 inline void
  96 PB_DS_CLASS_C_DEC::
  97 notify_find_search_end()
  98 { trigger_policy_base::notify_find_search_end(); }
  99
 100 PB_DS_CLASS_T_DEC
 101 inline void
 102 PB_DS_CLASS_C_DEC::
 103 notify_insert_search_start()
 104 { trigger_policy_base::notify_insert_search_start(); }
 105
 106 PB_DS_CLASS_T_DEC
 107 inline void
 108 PB_DS_CLASS_C_DEC::
 109 notify_insert_search_collision()
 110 { trigger_policy_base::notify_insert_search_collision(); }
 111
 112 PB_DS_CLASS_T_DEC
 113 inline void
 114 PB_DS_CLASS_C_DEC::
 115 notify_insert_search_end()
 116 { trigger_policy_base::notify_insert_search_end(); }
 117
 118 PB_DS_CLASS_T_DEC
 119 inline void
 120 PB_DS_CLASS_C_DEC::
 121 notify_erase_search_start()
 122 { trigger_policy_base::notify_erase_search_start(); }
 123
 124 PB_DS_CLASS_T_DEC
 125 inline void
 126 PB_DS_CLASS_C_DEC::
 127 notify_erase_search_collision()
 128 { trigger_policy_base::notify_erase_search_collision(); }
 129
 130 PB_DS_CLASS_T_DEC
 131 inline void
 132 PB_DS_CLASS_C_DEC::
 133 notify_erase_search_end()
 134 { trigger_policy_base::notify_erase_search_end(); }
 135
 136 PB_DS_CLASS_T_DEC
 137 inline void
 138 PB_DS_CLASS_C_DEC::
 139 notify_inserted(size_type num_e)
 140 { trigger_policy_base::notify_inserted(num_e); }
 141
 142 PB_DS_CLASS_T_DEC
 143 inline void
 144 PB_DS_CLASS_C_DEC::
 145 notify_erased(size_type num_e)
 146 { trigger_policy_base::notify_erased(num_e); }
 147
 148 PB_DS_CLASS_T_DEC
 149 void
 150 PB_DS_CLASS_C_DEC::
 151 notify_cleared()
 152 { trigger_policy_base::notify_cleared(); }
 153
 154 PB_DS_CLASS_T_DEC
 155 inline bool
 156 PB_DS_CLASS_C_DEC::
 157 is_resize_needed() const
 158 { return trigger_policy_base::is_resize_needed(); }
 159
 160 PB_DS_CLASS_T_DEC
 161 typename PB_DS_CLASS_C_DEC::size_type
 162 PB_DS_CLASS_C_DEC::
 163 get_new_size(size_type size, size_type num_used_e) const
 164 {
 165   if (trigger_policy_base::is_grow_needed(size, num_used_e))
 166     return size_policy_base::get_nearest_larger_size(size);
 167   return size_policy_base::get_nearest_smaller_size(size);
 168 }
 169
 170 PB_DS_CLASS_T_DEC
 171 void
 172 PB_DS_CLASS_C_DEC::
 173 notify_resized(size_type new_size)
 174 {
 175   trigger_policy_base::notify_resized(new_size);
 176   m_size = new_size;
 177 }
 178
 179 PB_DS_CLASS_T_DEC
 180 inline typename PB_DS_CLASS_C_DEC::size_type
 181 PB_DS_CLASS_C_DEC::
 182 get_actual_size() const
 183 {
 184   PB_DS_STATIC_ASSERT(access, external_size_access);
 185   return m_size;
 186 }
 187
 188 PB_DS_CLASS_T_DEC
 189 void
 190 PB_DS_CLASS_C_DEC::
 191 resize(size_type new_size)
 192 {
 193   PB_DS_STATIC_ASSERT(access, external_size_access);
 194   size_type actual_size = size_policy_base::get_nearest_larger_size(1);
 195   while (actual_size < new_size)
 196     {
 197       const size_type pot = size_policy_base::get_nearest_larger_size(actual_size);
 198
 199       if (pot == actual_size && pot < new_size)
 200         __throw_resize_error();
 201       actual_size = pot;
 202     }
 203
 204   if (actual_size > 0)
 205     --actual_size;
 206
 207   const size_type old_size = m_size;
 208   try
 209     {
 210       do_resize(actual_size - 1);
 211     }
 212   catch(insert_error& )
 213     {
 214       m_size = old_size;
 215       __throw_resize_error();
 216     }
 217   catch(...)
 218     {
 219       m_size = old_size;
 220       __throw_exception_again;
 221     }
 222 }
 223
 224 PB_DS_CLASS_T_DEC
 225 void
 226 PB_DS_CLASS_C_DEC::
 227 do_resize(size_type)
 228 {
 229   // Do nothing
 230 }
 231
 232 PB_DS_CLASS_T_DEC
 233 Trigger_Policy&
 234 PB_DS_CLASS_C_DEC::
 235 get_trigger_policy()
 236 { return *this; }
 237
 238 PB_DS_CLASS_T_DEC
 239 const Trigger_Policy&
 240 PB_DS_CLASS_C_DEC::
 241 get_trigger_policy() const
 242 { return *this; }
 243
 244 PB_DS_CLASS_T_DEC
 245 Size_Policy&
 246 PB_DS_CLASS_C_DEC::
 247 get_size_policy()
 248 { return *this; }
 249
 250 PB_DS_CLASS_T_DEC
 251 const Size_Policy&
 252 PB_DS_CLASS_C_DEC::
 253 get_size_policy() const
 254 { return *this; }
 255