old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/standard_policies.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 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
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file standard_policies.hpp
  42  * Contains standard policies for containers.
  43  */
  44
  45 #ifndef STANDARD_POLICIES_HPP
  46 #define STANDARD_POLICIES_HPP
  47
  48 #include <memory>
  49 #include <ext/pb_assoc/hash_policy.hpp>
  50 #include <ext/pb_assoc/lu_policy.hpp>
  51 #include <ext/pb_assoc/tree_policy.hpp>
  52 #if defined(__GNUC__)
  53 #include <ext/hash_map>
  54 #elif defined(_MSC_VER)
  55 #include <hash_map>
  56 #else
  57 #error "Unable to determine the namespaces for your compiler. Please" \
  58         "Contact pbassoc@gmail.com"
  59 #endif // #if defined(__GNUC__)
  60
  61 namespace pb_assoc
  62 {
  63
  64   namespace detail
  65   {
  66
  67 #ifdef __GNUC__
  68
  69 #define PB_ASSOC_HASH_NAMESPACE \
  70         __gnu_cxx
  71
  72     template<typename Key>
  73     struct def_hash_fn
  74     {
  75       typedef PB_ASSOC_HASH_NAMESPACE::hash<Key> type;
  76     };
  77
  78     template<typename Key>
  79     struct def_eq_fn
  80     {
  81       typedef PB_ASSOC_HASH_NAMESPACE::equal_to<Key> type;
  82     };
  83
  84 #elif defined(_MSC_VER)
  85
  86     template<typename Key>
  87     struct hash_value_class_adapter
  88     {
  89       inline size_t
  90       operator()(const Key& r_key) const
  91       {
  92         return (stdext::hash_value(r_key));
  93       }
  94     };
  95
  96     template<typename Key>
  97     struct def_hash_fn
  98     {
  99       typedef hash_value_class_adapter<Key> type;
 100     };
 101
 102     template<typename Key>
 103     struct def_eq_fn
 104     {
 105       typedef std::equal_to<Key> type;
 106     };
 107
 108 #else // #elif defined(_MSC_VER)
 109
 110 #error Sorry, cannot determine headers, namespaces, etc. for your compiler.
 111 #error If you encounter this error, pls write to pbassoc@gmail.com
 112
 113 #endif // #elif defined(_MSC_VER)
 114
 115     enum
 116       {
 117         def_store_hash = false
 118       };
 119
 120     struct def_comb_hash_fn
 121     {
 122       typedef pb_assoc::direct_mask_range_hashing<> type;
 123     };
 124
 125     template<class Comb_Hash_Fn>
 126     struct def_resize_policy
 127     {
 128     private:
 129       typedef typename Comb_Hash_Fn::size_type size_type;
 130
 131       typedef
 132       typename pb_assoc::detail::cond_type<
 133         pb_assoc::detail::is_same_type<
 134         pb_assoc::direct_mask_range_hashing<size_type>,
 135         Comb_Hash_Fn>::value,
 136         pb_assoc::hash_exponential_size_policy<
 137         size_type>,
 138         pb_assoc::hash_prime_size_policy>::type
 139       size_policy_type;
 140
 141     public:
 142       typedef
 143       pb_assoc::hash_standard_resize_policy<
 144         size_policy_type,
 145         pb_assoc::hash_load_check_resize_trigger<
 146         false,
 147         size_type>,
 148         false,
 149         size_type>
 150       type;
 151     };
 152
 153     struct def_update_policy
 154     {
 155       typedef pb_assoc::move_to_front_lu_policy<> type;
 156     };
 157
 158 #ifdef __GNUC__
 159 #undef PB_ASSOC_HASH_NAMESPACE
 160 #endif // #ifdef __GNUC__
 161
 162     template<class Comb_Probe_Fn>
 163     struct def_probe_fn
 164     {
 165     private:
 166       typedef typename Comb_Probe_Fn::size_type size_type;
 167
 168     public:
 169       typedef
 170       typename pb_assoc::detail::cond_type<
 171         pb_assoc::detail::is_same_type<
 172         pb_assoc::direct_mask_range_hashing<size_t>,
 173         Comb_Probe_Fn>::value,
 174         pb_assoc::linear_probe_fn<
 175         size_type>,
 176         pb_assoc::quadratic_probe_fn<
 177         size_type> >::type
 178       type;
 179     };
 180
 181     typedef pb_assoc::null_node_updator def_node_updator;
 182
 183   } // namespace detail
 184
 185 } // namespace pb_assoc
 186
 187 #endif // #ifndef STANDARD_POLICIES_HPP
 188