1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2018 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 splay_tree_/splay_tree_.hpp 38 * Contains an implementation class for splay trees. 39 */ 40 /* 41 * This implementation uses an idea from the SGI STL (using a @a header node 42 * which is needed for efficient iteration). Following is the SGI STL 43 * copyright. 44 * 45 * Copyright (c) 1996,1997 46 * Silicon Graphics Computer Systems, Inc. 47 * 48 * Permission to use, copy, modify, distribute and sell this software 49 * and its documentation for any purpose is hereby granted without fee, 50 * provided that the above copyright notice appear in all copies and 51 * that both that copyright notice and this permission notice appear 52 * in supporting documentation. Silicon Graphics makes no 53 * representations about the suitability of this software for any 54 * purpose. It is provided "as is" without express or implied warranty. 55 * 56 * 57 * Copyright (c) 1994 58 * Hewlett-Packard Company 59 * 60 * Permission to use, copy, modify, distribute and sell this software 61 * and its documentation for any purpose is hereby granted without fee, 62 * provided that the above copyright notice appear in all copies and 63 * that both that copyright notice and this permission notice appear 64 * in supporting documentation. Hewlett-Packard Company makes no 65 * representations about the suitability of this software for any 66 * purpose. It is provided "as is" without express or implied warranty. 67 * 68 * 69 */ 70 71 #include <utility> 72 #include <vector> 73 #include <assert.h> 74 #include <debug/debug.h> 75 76 namespace __gnu_pbds 77 { 78 namespace detail 79 { 80 #ifdef PB_DS_DATA_TRUE_INDICATOR 81 # define PB_DS_S_TREE_NAME splay_tree_map 82 # define PB_DS_S_TREE_BASE_NAME bin_search_tree_map 83 #endif 84 85 #ifdef PB_DS_DATA_FALSE_INDICATOR 86 # define PB_DS_S_TREE_NAME splay_tree_set 87 # define PB_DS_S_TREE_BASE_NAME bin_search_tree_set 88 #endif 89 90 #define PB_DS_CLASS_T_DEC \ 91 template<typename Key, typename Mapped, typename Cmp_Fn, \ 92 typename Node_And_It_Traits, typename _Alloc> 93 94 #define PB_DS_CLASS_C_DEC \ 95 PB_DS_S_TREE_NAME<Key, Mapped, Cmp_Fn, Node_And_It_Traits, _Alloc> 96 97 #define PB_DS_S_TREE_BASE \ 98 PB_DS_S_TREE_BASE_NAME<Key, Mapped, Cmp_Fn, Node_And_It_Traits, _Alloc> 99 100 101 /** 102 * @brief Splay tree. 103 * @ingroup branch-detail 104 */ 105 template<typename Key, typename Mapped, typename Cmp_Fn, 106 typename Node_And_It_Traits, typename _Alloc> 107 class PB_DS_S_TREE_NAME : public PB_DS_S_TREE_BASE 108 { 109 private: 110 typedef PB_DS_S_TREE_BASE base_type; 111 #ifdef _GLIBCXX_DEBUG 112 typedef base_type debug_base; 113 #endif 114 typedef typename base_type::node_pointer node_pointer; 115 116 public: 117 typedef splay_tree_tag container_category; 118 typedef _Alloc allocator_type; 119 typedef typename _Alloc::size_type size_type; 120 typedef typename _Alloc::difference_type difference_type; 121 typedef Cmp_Fn cmp_fn; 122 typedef typename base_type::key_type key_type; 123 typedef typename base_type::key_pointer key_pointer; 124 typedef typename base_type::key_const_pointer key_const_pointer; 125 typedef typename base_type::key_reference key_reference; 126 typedef typename base_type::key_const_reference key_const_reference; 127 typedef typename base_type::mapped_type mapped_type; 128 typedef typename base_type::mapped_pointer mapped_pointer; 129 typedef typename base_type::mapped_const_pointer mapped_const_pointer; 130 typedef typename base_type::mapped_reference mapped_reference; 131 typedef typename base_type::mapped_const_reference mapped_const_reference; 132 typedef typename base_type::value_type value_type; 133 typedef typename base_type::pointer pointer; 134 typedef typename base_type::const_pointer const_pointer; 135 typedef typename base_type::reference reference; 136 typedef typename base_type::const_reference const_reference; 137 typedef typename base_type::point_iterator point_iterator; 138 typedef typename base_type::const_iterator point_const_iterator; 139 typedef typename base_type::iterator iterator; 140 typedef typename base_type::const_iterator const_iterator; 141 typedef typename base_type::reverse_iterator reverse_iterator; 142 typedef typename base_type::const_reverse_iterator const_reverse_iterator; 143 typedef typename base_type::node_update node_update; 144 145 PB_DS_S_TREE_NAME(); 146 147 PB_DS_S_TREE_NAME(const Cmp_Fn&); 148 149 PB_DS_S_TREE_NAME(const Cmp_Fn&, const node_update&); 150 151 PB_DS_S_TREE_NAME(const PB_DS_CLASS_C_DEC&); 152 153 void 154 swap(PB_DS_CLASS_C_DEC&); 155 156 template<typename It> 157 void 158 copy_from_range(It, It); 159 160 void 161 initialize(); 162 163 inline std::pair<point_iterator, bool> 164 insert(const_reference r_value); 165 166 inline mapped_reference 167 operator[](key_const_reference r_key) 168 { 169 #ifdef PB_DS_DATA_TRUE_INDICATOR 170 _GLIBCXX_DEBUG_ONLY(assert_valid(__FILE__, __LINE__);) 171 std::pair<point_iterator, bool> ins_pair = 172 insert_leaf_imp(value_type(r_key, mapped_type())); 173 174 ins_pair.first.m_p_nd->m_special = false; 175 _GLIBCXX_DEBUG_ONLY(base_type::assert_valid(__FILE__, __LINE__)); 176 splay(ins_pair.first.m_p_nd); 177 _GLIBCXX_DEBUG_ONLY(assert_valid(__FILE__, __LINE__);) 178 return ins_pair.first.m_p_nd->m_value.second; 179 #else 180 insert(r_key); 181 return base_type::s_null_type; 182 #endif 183 } 184 185 inline point_iterator 186 find(key_const_reference); 187 188 inline point_const_iterator 189 find(key_const_reference) const; 190 191 inline bool 192 erase(key_const_reference); 193 194 inline iterator 195 erase(iterator it); 196 197 inline reverse_iterator 198 erase(reverse_iterator); 199 200 template<typename Pred> 201 inline size_type 202 erase_if(Pred); 203 204 void 205 join(PB_DS_CLASS_C_DEC&); 206 207 void 208 split(key_const_reference, PB_DS_CLASS_C_DEC&); 209 210 private: 211 inline std::pair<point_iterator, bool> 212 insert_leaf_imp(const_reference); 213 214 inline node_pointer 215 find_imp(key_const_reference); 216 217 inline const node_pointer 218 find_imp(key_const_reference) const; 219 220 #ifdef _GLIBCXX_DEBUG 221 void 222 assert_valid(const char* file, int line) const; 223 224 void 225 assert_special_imp(const node_pointer, const char* file, int line) const; 226 #endif 227 228 void 229 splay(node_pointer); 230 231 inline void 232 splay_zig_zag_left(node_pointer, node_pointer, node_pointer); 233 234 inline void 235 splay_zig_zag_right(node_pointer, node_pointer, node_pointer); 236 237 inline void 238 splay_zig_zig_left(node_pointer, node_pointer, node_pointer); 239 240 inline void 241 splay_zig_zig_right(node_pointer, node_pointer, node_pointer); 242 243 inline void 244 splay_zz_start(node_pointer, node_pointer, node_pointer); 245 246 inline void 247 splay_zz_end(node_pointer, node_pointer, node_pointer); 248 249 inline node_pointer 250 leftmost(node_pointer); 251 252 void 253 erase_node(node_pointer); 254 }; 255 256 #define PB_DS_ASSERT_BASE_NODE_CONSISTENT(_Node) \ 257 _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(_Node, \ 258 __FILE__, __LINE__);) 259 260 #include <ext/pb_ds/detail/splay_tree_/constructors_destructor_fn_imps.hpp> 261 #include <ext/pb_ds/detail/splay_tree_/insert_fn_imps.hpp> 262 #include <ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp> 263 #include <ext/pb_ds/detail/splay_tree_/erase_fn_imps.hpp> 264 #include <ext/pb_ds/detail/splay_tree_/find_fn_imps.hpp> 265 #include <ext/pb_ds/detail/splay_tree_/debug_fn_imps.hpp> 266 #include <ext/pb_ds/detail/splay_tree_/split_join_fn_imps.hpp> 267 268 #undef PB_DS_ASSERT_BASE_NODE_CONSISTENT 269 #undef PB_DS_CLASS_T_DEC 270 #undef PB_DS_CLASS_C_DEC 271 #undef PB_DS_S_TREE_NAME 272 #undef PB_DS_S_TREE_BASE_NAME 273 #undef PB_DS_S_TREE_BASE 274 } // namespace detail 275 } // namespace __gnu_pbds 276