libstdc++
pat_trie_/find_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2019 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
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8 // Foundation; either version 3, or (at your option) any later
9 // version.
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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.
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
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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
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35 
36 /**
37  * @file pat_trie_/find_fn_imps.hpp
38  * Contains an implementation class for pat_trie.
39  */
40 
41 PB_DS_CLASS_T_DEC
42 inline typename PB_DS_CLASS_C_DEC::point_iterator
43 PB_DS_CLASS_C_DEC::
44 find(key_const_reference r_key)
45 {
46  PB_DS_ASSERT_VALID((*this))
47  node_pointer p_nd = find_imp(r_key);
48 
49  if (p_nd == 0 || p_nd->m_type != leaf_node)
50  {
51  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
52  return end();
53  }
54 
55  if (synth_access_traits::equal_keys(PB_DS_V2F(static_cast<leaf_pointer>(p_nd)->value()), r_key))
56  {
57  PB_DS_CHECK_KEY_EXISTS(r_key)
58  return iterator(p_nd);
59  }
60 
61  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
62  return end();
63 }
64 
65 PB_DS_CLASS_T_DEC
66 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
67 PB_DS_CLASS_C_DEC::
68 find(key_const_reference r_key) const
69 {
70  PB_DS_ASSERT_VALID((*this))
71 
72  node_const_pointer p_nd = const_cast<PB_DS_CLASS_C_DEC* >(this)->find_imp(r_key);
73 
74  if (p_nd == 0 || p_nd->m_type != leaf_node)
75  {
76  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
77  return end();
78  }
79 
80  if (synth_access_traits::equal_keys(PB_DS_V2F(static_cast<leaf_const_pointer>(p_nd)->value()), r_key))
81  {
82  PB_DS_CHECK_KEY_EXISTS(r_key)
83  return const_iterator(const_cast<node_pointer>(p_nd));
84  }
85 
86  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
87  return end();
88 }
89 
90 PB_DS_CLASS_T_DEC
91 inline typename PB_DS_CLASS_C_DEC::node_pointer
92 PB_DS_CLASS_C_DEC::
93 find_imp(key_const_reference r_key)
94 {
95  if (empty())
96  return 0;
97 
98  typename synth_access_traits::const_iterator b_it =
100  typename synth_access_traits::const_iterator e_it =
102 
103  node_pointer p_nd = m_p_head->m_p_parent;
104  _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
105 
106  while (p_nd->m_type != leaf_node)
107  {
108  _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == i_node);
109  node_pointer p_next_nd = static_cast<inode_pointer>(p_nd)->get_child_node(b_it, e_it, this);
110 
111  if (p_next_nd == 0)
112  return p_nd;
113  p_nd = p_next_nd;
114  }
115  return p_nd;
116 }
117 
118 PB_DS_CLASS_T_DEC
119 inline typename PB_DS_CLASS_C_DEC::node_pointer
120 PB_DS_CLASS_C_DEC::
121 lower_bound_imp(key_const_reference r_key)
122 {
123  if (empty())
124  return (m_p_head);
125 
126  node_pointer p_nd = m_p_head->m_p_parent;
127  _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
128 
129  typename PB_DS_CLASS_C_DEC::a_const_iterator b_it =
131 
132  typename PB_DS_CLASS_C_DEC::a_const_iterator e_it =
134 
135  size_type checked_ind = 0;
136  while (true)
137  {
138  if (p_nd->m_type == leaf_node)
139  {
140  if (!synth_access_traits::cmp_keys(PB_DS_V2F(static_cast<leaf_const_pointer>(p_nd)->value()), r_key))
141  return p_nd;
142  iterator it(p_nd);
143  ++it;
144  return it.m_p_nd;
145  }
146 
147  _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == i_node);
148  const size_type new_checked_ind =
149  static_cast<inode_pointer>(p_nd)->get_e_ind();
150 
151  p_nd =
152  static_cast<inode_pointer>(p_nd)->get_lower_bound_child_node( b_it, e_it, checked_ind, this);
153  checked_ind = new_checked_ind;
154  }
155 }
156 
157 PB_DS_CLASS_T_DEC
158 inline typename PB_DS_CLASS_C_DEC::point_iterator
159 PB_DS_CLASS_C_DEC::
160 lower_bound(key_const_reference r_key)
161 { return point_iterator(lower_bound_imp(r_key)); }
162 
163 PB_DS_CLASS_T_DEC
164 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
165 PB_DS_CLASS_C_DEC::
166 lower_bound(key_const_reference r_key) const
167 {
168  return point_const_iterator(const_cast<PB_DS_CLASS_C_DEC* >(this)->lower_bound_imp(r_key));
169 }
170 
171 PB_DS_CLASS_T_DEC
172 inline typename PB_DS_CLASS_C_DEC::point_iterator
173 PB_DS_CLASS_C_DEC::
174 upper_bound(key_const_reference r_key)
175 {
176  point_iterator l_bound_it = lower_bound(r_key);
177 
178  _GLIBCXX_DEBUG_ASSERT(l_bound_it == end() ||
179  !synth_access_traits::cmp_keys(PB_DS_V2F(*l_bound_it),
180  r_key));
181 
182  if (l_bound_it == end() ||
183  synth_access_traits::cmp_keys(r_key, PB_DS_V2F(*l_bound_it)))
184  return l_bound_it;
185 
186  return ++l_bound_it;
187 }
188 
189 PB_DS_CLASS_T_DEC
190 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
191 PB_DS_CLASS_C_DEC::
192 upper_bound(key_const_reference r_key) const
193 {
194  point_const_iterator l_bound_it = lower_bound(r_key);
195 
196  _GLIBCXX_DEBUG_ASSERT(l_bound_it == end() ||
197  !synth_access_traits::cmp_keys(PB_DS_V2F(*l_bound_it),
198  r_key));
199 
200  if (l_bound_it == end() ||
201  synth_access_traits::cmp_keys(r_key, PB_DS_V2F(*l_bound_it)))
202  return l_bound_it;
203  return ++l_bound_it;
204 }
205 
206 PB_DS_CLASS_T_DEC
207 inline typename PB_DS_CLASS_C_DEC::a_const_iterator
208 PB_DS_CLASS_C_DEC::
209 pref_begin(node_const_pointer p_nd)
210 {
211  if (p_nd->m_type == leaf_node)
212  return (synth_access_traits::begin(PB_DS_V2F(static_cast<leaf_const_pointer>(p_nd)->value())));
213 
214  _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == i_node);
215  return static_cast<inode_const_pointer>(p_nd)->pref_b_it();
216 }
217 
218 PB_DS_CLASS_T_DEC
219 inline typename PB_DS_CLASS_C_DEC::a_const_iterator
220 PB_DS_CLASS_C_DEC::
221 pref_end(node_const_pointer p_nd)
222 {
223  if (p_nd->m_type == leaf_node)
224  return (synth_access_traits::end(PB_DS_V2F(static_cast<leaf_const_pointer>(p_nd)->value())));
225 
226  _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == i_node);
227  return static_cast<inode_const_pointer>(p_nd)->pref_e_it();
228 }
229 
230 PB_DS_CLASS_T_DEC
231 inline typename PB_DS_CLASS_C_DEC::leaf_const_pointer
232 PB_DS_CLASS_C_DEC::
233 leftmost_descendant(node_const_pointer p_nd)
234 {
235  if (p_nd->m_type == leaf_node)
236  return static_cast<leaf_const_pointer>(p_nd);
237  return static_cast<inode_const_pointer>(p_nd)->leftmost_descendant();
238 }
239 
240 PB_DS_CLASS_T_DEC
241 inline typename PB_DS_CLASS_C_DEC::leaf_pointer
242 PB_DS_CLASS_C_DEC::
243 leftmost_descendant(node_pointer p_nd)
244 {
245  if (p_nd->m_type == leaf_node)
246  return static_cast<leaf_pointer>(p_nd);
247  return static_cast<inode_pointer>(p_nd)->leftmost_descendant();
248 }
249 
250 PB_DS_CLASS_T_DEC
251 inline typename PB_DS_CLASS_C_DEC::leaf_const_pointer
252 PB_DS_CLASS_C_DEC::
253 rightmost_descendant(node_const_pointer p_nd)
254 {
255  if (p_nd->m_type == leaf_node)
256  return static_cast<leaf_const_pointer>(p_nd);
257  return static_cast<inode_const_pointer>(p_nd)->rightmost_descendant();
258 }
259 
260 PB_DS_CLASS_T_DEC
261 inline typename PB_DS_CLASS_C_DEC::leaf_pointer
262 PB_DS_CLASS_C_DEC::
263 rightmost_descendant(node_pointer p_nd)
264 {
265  if (p_nd->m_type == leaf_node)
266  return static_cast<leaf_pointer>(p_nd);
267  return static_cast<inode_pointer>(p_nd)->rightmost_descendant();
268 }
269 
constexpr const _Tp * end(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to one past the last element of the initializer_list. ...
constexpr const _Tp * begin(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to the first element of the initializer_list.