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1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2025 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 26 27 // Permission to use, copy, modify, sell, and distribute this software 28 // is hereby granted without fee, provided that the above copyright 29 // notice appears in all copies, and that both that copyright notice 30 // and this permission notice appear in supporting documentation. None 31 // of the above authors, nor IBM Haifa Research Laboratories, make any 32 // representation about the suitability of this software for any 33 // purpose. It is provided "as is" without express or implied 34 // warranty. 35 36 /** 37 * @file rb_tree_map_/rb_tree_.hpp 38 * Contains an implementation for Red Black trees. 39 */ 40 41 #include <ext/pb_ds/detail/standard_policies.hpp> 42 #include <utility> 43 #include <vector> 44 #include <assert.h> 45 #include <debug/debug.h> 46 47 namespace __gnu_pbds 48 { 49 namespace detail 50 { 51 #define PB_DS_CLASS_T_DEC \ 52 template<typename Key, typename Mapped, typename Cmp_Fn, \ 53 typename Node_And_It_Traits, typename _Alloc> 54 55 #ifdef PB_DS_DATA_TRUE_INDICATOR 56 # define PB_DS_RB_TREE_NAME rb_tree_map 57 # define PB_DS_RB_TREE_BASE_NAME bin_search_tree_map 58 #endif 59 60 #ifdef PB_DS_DATA_FALSE_INDICATOR 61 # define PB_DS_RB_TREE_NAME rb_tree_set 62 # define PB_DS_RB_TREE_BASE_NAME bin_search_tree_set 63 #endif 64 65 #define PB_DS_CLASS_C_DEC \ 66 PB_DS_RB_TREE_NAME<Key, Mapped, Cmp_Fn, Node_And_It_Traits, _Alloc> 67 68 #define PB_DS_RB_TREE_BASE \ 69 PB_DS_RB_TREE_BASE_NAME<Key, Mapped, Cmp_Fn, Node_And_It_Traits, _Alloc> 70 71 72 /** 73 * @brief Red-Black tree. 74 * @ingroup branch-detail 75 * 76 * This implementation uses an idea from the SGI STL (using a 77 * @a header node which is needed for efficient iteration). 78 */ 79 template<typename Key, 80 typename Mapped, 81 typename Cmp_Fn, 82 typename Node_And_It_Traits, 83 typename _Alloc> 84 class PB_DS_RB_TREE_NAME : public PB_DS_RB_TREE_BASE 85 { 86 private: 87 typedef PB_DS_RB_TREE_BASE base_type; 88 typedef typename base_type::node_pointer node_pointer; 89 90 public: 91 typedef rb_tree_tag container_category; 92 typedef Cmp_Fn cmp_fn; 93 typedef _Alloc allocator_type; 94 typedef typename _Alloc::size_type size_type; 95 typedef typename _Alloc::difference_type difference_type; 96 typedef typename base_type::key_type key_type; 97 typedef typename base_type::key_pointer key_pointer; 98 typedef typename base_type::key_const_pointer key_const_pointer; 99 typedef typename base_type::key_reference key_reference; 100 typedef typename base_type::key_const_reference key_const_reference; 101 typedef typename base_type::mapped_type mapped_type; 102 typedef typename base_type::mapped_pointer mapped_pointer; 103 typedef typename base_type::mapped_const_pointer mapped_const_pointer; 104 typedef typename base_type::mapped_reference mapped_reference; 105 typedef typename base_type::mapped_const_reference mapped_const_reference; 106 typedef typename base_type::value_type value_type; 107 typedef typename base_type::pointer pointer; 108 typedef typename base_type::const_pointer const_pointer; 109 typedef typename base_type::reference reference; 110 typedef typename base_type::const_reference const_reference; 111 typedef typename base_type::point_iterator point_iterator; 112 typedef typename base_type::const_iterator point_const_iterator; 113 typedef typename base_type::iterator iterator; 114 typedef typename base_type::const_iterator const_iterator; 115 typedef typename base_type::reverse_iterator reverse_iterator; 116 typedef typename base_type::const_reverse_iterator const_reverse_iterator; 117 typedef typename base_type::node_update node_update; 118 119 PB_DS_RB_TREE_NAME(); 120 121 PB_DS_RB_TREE_NAME(const Cmp_Fn&); 122 123 PB_DS_RB_TREE_NAME(const Cmp_Fn&, const node_update&); 124 125 PB_DS_RB_TREE_NAME(const PB_DS_CLASS_C_DEC&); 126 127 void 128 swap(PB_DS_CLASS_C_DEC&); 129 130 template<typename It> 131 void 132 copy_from_range(It, It); 133 134 inline std::pair<point_iterator, bool> 135 insert(const_reference); 136 137 inline mapped_reference 138 operator[](key_const_reference r_key) 139 { 140 #ifdef PB_DS_DATA_TRUE_INDICATOR 141 _GLIBCXX_DEBUG_ONLY(assert_valid(__FILE__, __LINE__);) 142 std::pair<point_iterator, bool> ins_pair = 143 base_type::insert_leaf(value_type(r_key, mapped_type())); 144 145 if (ins_pair.second == true) 146 { 147 ins_pair.first.m_p_nd->m_red = true; 148 _GLIBCXX_DEBUG_ONLY(this->structure_only_assert_valid(__FILE__, __LINE__);) 149 insert_fixup(ins_pair.first.m_p_nd); 150 } 151 _GLIBCXX_DEBUG_ONLY(assert_valid(__FILE__, __LINE__);) 152 return ins_pair.first.m_p_nd->m_value.second; 153 #else 154 insert(r_key); 155 return base_type::s_null_type; 156 #endif 157 } 158 159 inline bool 160 erase(key_const_reference); 161 162 inline iterator 163 erase(iterator); 164 165 inline reverse_iterator 166 erase(reverse_iterator); 167 168 template<typename Pred> 169 inline size_type 170 erase_if(Pred); 171 172 void 173 join(PB_DS_CLASS_C_DEC&); 174 175 void 176 split(key_const_reference, PB_DS_CLASS_C_DEC&); 177 178 private: 179 180 #ifdef _GLIBCXX_DEBUG 181 void 182 assert_valid(const char*, int) const; 183 184 size_type 185 assert_node_consistent(const node_pointer, const char*, int) const; 186 #endif 187 188 inline static bool 189 is_effectively_black(const node_pointer); 190 191 void 192 initialize(); 193 194 void 195 insert_fixup(node_pointer); 196 197 void 198 erase_node(node_pointer); 199 200 void 201 remove_node(node_pointer); 202 203 void 204 remove_fixup(node_pointer, node_pointer); 205 206 void 207 split_imp(node_pointer, PB_DS_CLASS_C_DEC&); 208 209 inline node_pointer 210 split_min(); 211 212 std::pair<node_pointer, node_pointer> 213 split_min_imp(); 214 215 void 216 join_imp(node_pointer, node_pointer); 217 218 std::pair<node_pointer, node_pointer> 219 find_join_pos_right(node_pointer, size_type, size_type); 220 221 std::pair<node_pointer, node_pointer> 222 find_join_pos_left(node_pointer, size_type, size_type); 223 224 inline size_type 225 black_height(node_pointer); 226 227 void 228 split_at_node(node_pointer, PB_DS_CLASS_C_DEC&); 229 }; 230 231 #define PB_DS_STRUCT_ONLY_ASSERT_VALID(X) \ 232 _GLIBCXX_DEBUG_ONLY(X.structure_only_assert_valid(__FILE__, __LINE__);) 233 234 #include <ext/pb_ds/detail/rb_tree_map_/constructors_destructor_fn_imps.hpp> 235 #include <ext/pb_ds/detail/rb_tree_map_/insert_fn_imps.hpp> 236 #include <ext/pb_ds/detail/rb_tree_map_/erase_fn_imps.hpp> 237 #include <ext/pb_ds/detail/rb_tree_map_/debug_fn_imps.hpp> 238 #include <ext/pb_ds/detail/rb_tree_map_/split_join_fn_imps.hpp> 239 #include <ext/pb_ds/detail/rb_tree_map_/info_fn_imps.hpp> 240 241 #undef PB_DS_STRUCT_ONLY_ASSERT_VALID 242 #undef PB_DS_CLASS_T_DEC 243 #undef PB_DS_CLASS_C_DEC 244 #undef PB_DS_RB_TREE_NAME 245 #undef PB_DS_RB_TREE_BASE_NAME 246 #undef PB_DS_RB_TREE_BASE 247 } // namespace detail 248 } // namespace __gnu_pbds
