libstdc++
rb_tree_.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009, 2010, 2011 Free Software Foundation, Inc.
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11 // This library is distributed in the hope that it will be useful, but
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16 // Under Section 7 of GPL version 3, you are granted additional
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18 // 3.1, as published by the Free Software Foundation.
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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35 
36 /**
37  * @file rb_tree_map_/rb_tree_.hpp
38  * Contains an implementation for Red Black trees.
39  */
40 
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:
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 
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__);)
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 
213  split_min_imp();
214 
215  void
216  join_imp(node_pointer, node_pointer);
217 
219  find_join_pos_right(node_pointer, size_type, size_type);
220 
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 
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