libstdc++-v3/testsuite/util/native_type/assoc/native_hash_set.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
  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 native_hash_set.hpp
  44  * Contains an adapter to Dinkumware/SGI hash tables
  45  */
  46
  47 #ifndef PB_DS_NATIVE_HASH_SET_HPP
  48 #define PB_DS_NATIVE_HASH_SET_HPP
  49
  50 #include <string>
  51 #include <ext/pb_ds/detail/type_utils.hpp>
  52 #include <ext/pb_ds/detail/standard_policies.hpp>
  53 #include <native_type/assoc/native_hash_tag.hpp>
  54 #include <io/xml.hpp>
  55
  56 // Default to using tr1.
  57 #define PB_DS_USE_TR1 1
  58
  59 #ifdef PB_DS_USE_TR1
  60 #include <tr1/unordered_set>
  61 #else
  62 #include <ext/hash_set>
  63 #endif
  64
  65 namespace __gnu_pbds
  66 {
  67   namespace test
  68   {
  69 #ifdef PB_DS_USE_TR1
  70 #define PB_DS_BASE_C_DEC \
  71     std::tr1::__unordered_set<Key, Hash_Fn, Eq_Fn, \
  72     typename Allocator::template rebind<Key>::other, Cache_Hash>
  73 #else
  74 #define PB_DS_BASE_C_DEC \
  75     __gnu_cxx::hash_set<Key, Hash_Fn, Eq_Fn, \
  76     typename Allocator::template rebind<Key>::other>
  77 #endif
  78
  79     template<typename Key,
  80              size_t Init_Size = 8,
  81          typename Hash_Fn = typename __gnu_pbds::detail::default_hash_fn<Key>::type,
  82              typename Eq_Fn = std::equal_to<Key>,
  83              typename Less_Fn = std::less<Key>,
  84              typename Allocator = std::allocator<char>
  85 #ifdef PB_DS_USE_TR1
  86              , bool Cache_Hash = false
  87 #endif
  88              >
  89     class native_hash_set : public PB_DS_BASE_C_DEC
  90     {
  91     private:
  92       typedef PB_DS_BASE_C_DEC base_type;
  93
  94     public:
  95       typedef native_hash_tag container_category;
  96
  97       native_hash_set() : base_type(Init_Size) { }
  98
  99       template<typename It>
 100       native_hash_set(It f, It l) : base_type(f, l) { }
 101
 102       template<typename Pred>
 103       inline size_t
 104       erase_if(Pred pred)
 105       {
 106         size_t ersd = 0;
 107         bool done = false;
 108         while (!done)
 109           {
 110             typename base_type::iterator b_it = base_type::begin();
 111             typename base_type::iterator e_it = base_type::end();
 112             done = true;
 113             while (b_it != e_it)
 114               {
 115                 if (pred(*b_it))
 116                   {
 117                     ++ersd;
 118                     done = false;
 119                     base_type::erase(*b_it);
 120                     b_it = e_it;
 121                   }
 122                 else
 123                   ++b_it;
 124               }
 125           }
 126         return ersd;
 127       }
 128
 129       static std::string
 130       name()
 131       {
 132 #ifdef PB_DS_USE_TR1
 133         return std::string("n_hash_set_")
 134                + (Cache_Hash ? std::string("cah") : std::string("ncah"));
 135 #else
 136         return std::string("n_hash_set_ncah");
 137 #endif
 138       }
 139
 140       static std::string
 141       desc()
 142       {
 143 #ifdef PB_DS_USE_TR1
 144         const std::string cache_hash_desc =
 145         make_xml_tag("cache_hash_code", "value",
 146                      Cache_Hash ? std::string("true") : std::string("false"));
 147
 148         return make_xml_tag("type", "value", "std_tr1_unordered_set",
 149                             cache_hash_desc);
 150 #else
 151         return make_xml_tag("type", "value", "__gnucxx_hash_set");
 152 #endif
 153       }
 154     };
 155
 156 #undef PB_DS_BASE_C_DEC
 157   } // namespace test
 158 } // namespace __gnu_pbds
 159
 160 #endif