libstdc++
insert_join_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2020 Free Software Foundation, Inc.
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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.
26 
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28 // is hereby granted without fee, provided that the above copyright
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35 
36 /**
37  * @file pat_trie_/insert_join_fn_imps.hpp
38  * Contains an implementation class for pat_trie.
39  */
40 
41 #ifdef PB_DS_CLASS_C_DEC
42 
43 PB_DS_CLASS_T_DEC
44 void
45 PB_DS_CLASS_C_DEC::
46 join(PB_DS_CLASS_C_DEC& other)
47 {
48  PB_DS_ASSERT_VALID((*this))
49  PB_DS_ASSERT_VALID(other)
50  branch_bag bag;
51  if (!join_prep(other, bag))
52  {
53  PB_DS_ASSERT_VALID((*this))
54  PB_DS_ASSERT_VALID(other)
55  return;
56  }
57 
58  m_p_head->m_p_parent = rec_join(m_p_head->m_p_parent,
59  other.m_p_head->m_p_parent, 0, bag);
60 
61  m_p_head->m_p_parent->m_p_parent = m_p_head;
62  m_size += other.m_size;
63  other.initialize();
64  PB_DS_ASSERT_VALID(other)
65  m_p_head->m_p_min = leftmost_descendant(m_p_head->m_p_parent);
66  m_p_head->m_p_max = rightmost_descendant(m_p_head->m_p_parent);
67  PB_DS_ASSERT_VALID((*this))
68 }
69 
70 PB_DS_CLASS_T_DEC
71 bool
72 PB_DS_CLASS_C_DEC::
73 join_prep(PB_DS_CLASS_C_DEC& other, branch_bag& r_bag)
74 {
75  PB_DS_ASSERT_VALID((*this))
76  PB_DS_ASSERT_VALID(other)
77  if (other.m_size == 0)
78  return false;
79 
80  if (m_size == 0)
81  {
82  value_swap(other);
83  return false;
84  }
85 
86  const bool greater =
87  synth_access_traits::cmp_keys(PB_DS_V2F(static_cast<leaf_const_pointer>(m_p_head->m_p_max)->value()),
88  PB_DS_V2F(static_cast<leaf_const_pointer>(other.m_p_head->m_p_min)->value()));
89 
90  const bool lesser =
91  synth_access_traits::cmp_keys(PB_DS_V2F(static_cast<leaf_const_pointer>(other.m_p_head->m_p_max)->value()),
92  PB_DS_V2F(static_cast<leaf_const_pointer>(m_p_head->m_p_min)->value()));
93 
94  if (!greater && !lesser)
95  __throw_join_error();
96 
97  rec_join_prep(m_p_head->m_p_parent, other.m_p_head->m_p_parent, r_bag);
98  _GLIBCXX_DEBUG_ONLY(debug_base::join(other, false);)
99  return true;
100 }
101 
102 PB_DS_CLASS_T_DEC
103 void
104 PB_DS_CLASS_C_DEC::
105 rec_join_prep(node_const_pointer p_l, node_const_pointer p_r,
106  branch_bag& r_bag)
107 {
108  if (p_l->m_type == leaf_node)
109  {
110  if (p_r->m_type == leaf_node)
111  {
112  rec_join_prep(static_cast<leaf_const_pointer>(p_l),
113  static_cast<leaf_const_pointer>(p_r), r_bag);
114  return;
115  }
116 
117  _GLIBCXX_DEBUG_ASSERT(p_r->m_type == i_node);
118  rec_join_prep(static_cast<leaf_const_pointer>(p_l),
119  static_cast<inode_const_pointer>(p_r), r_bag);
120  return;
121  }
122 
123  _GLIBCXX_DEBUG_ASSERT(p_l->m_type == i_node);
124  if (p_r->m_type == leaf_node)
125  {
126  rec_join_prep(static_cast<inode_const_pointer>(p_l),
127  static_cast<leaf_const_pointer>(p_r), r_bag);
128  return;
129  }
130 
131  _GLIBCXX_DEBUG_ASSERT(p_r->m_type == i_node);
132 
133  rec_join_prep(static_cast<inode_const_pointer>(p_l),
134  static_cast<inode_const_pointer>(p_r), r_bag);
135 }
136 
137 PB_DS_CLASS_T_DEC
138 void
139 PB_DS_CLASS_C_DEC::
140 rec_join_prep(leaf_const_pointer /*p_l*/, leaf_const_pointer /*p_r*/,
141  branch_bag& r_bag)
142 { r_bag.add_branch(); }
143 
144 PB_DS_CLASS_T_DEC
145 void
146 PB_DS_CLASS_C_DEC::
147 rec_join_prep(leaf_const_pointer /*p_l*/, inode_const_pointer /*p_r*/,
148  branch_bag& r_bag)
149 { r_bag.add_branch(); }
150 
151 PB_DS_CLASS_T_DEC
152 void
153 PB_DS_CLASS_C_DEC::
154 rec_join_prep(inode_const_pointer /*p_l*/, leaf_const_pointer /*p_r*/,
155  branch_bag& r_bag)
156 { r_bag.add_branch(); }
157 
158 PB_DS_CLASS_T_DEC
159 void
160 PB_DS_CLASS_C_DEC::
161 rec_join_prep(inode_const_pointer p_l, inode_const_pointer p_r,
162  branch_bag& r_bag)
163 {
164  if (p_l->get_e_ind() == p_r->get_e_ind() &&
165  synth_access_traits::equal_prefixes(p_l->pref_b_it(), p_l->pref_e_it(),
166  p_r->pref_b_it(), p_r->pref_e_it()))
167  {
168  for (typename inode::const_iterator it = p_r->begin();
169  it != p_r->end(); ++ it)
170  {
171  node_const_pointer p_l_join_child = p_l->get_join_child(*it, this);
172  if (p_l_join_child != 0)
173  rec_join_prep(p_l_join_child, * it, r_bag);
174  }
175  return;
176  }
177 
178  if (p_r->get_e_ind() < p_l->get_e_ind() &&
179  p_r->should_be_mine(p_l->pref_b_it(), p_l->pref_e_it(), 0, this))
180  {
181  node_const_pointer p_r_join_child = p_r->get_join_child(p_l, this);
182  if (p_r_join_child != 0)
183  rec_join_prep(p_r_join_child, p_l, r_bag);
184  return;
185  }
186 
187  if (p_r->get_e_ind() < p_l->get_e_ind() &&
188  p_r->should_be_mine(p_l->pref_b_it(), p_l->pref_e_it(), 0, this))
189  {
190  node_const_pointer p_r_join_child = p_r->get_join_child(p_l, this);
191  if (p_r_join_child != 0)
192  rec_join_prep(p_r_join_child, p_l, r_bag);
193  return;
194  }
195  r_bag.add_branch();
196 }
197 
198 PB_DS_CLASS_T_DEC
199 typename PB_DS_CLASS_C_DEC::node_pointer
200 PB_DS_CLASS_C_DEC::
201 rec_join(node_pointer p_l, node_pointer p_r, size_type checked_ind,
202  branch_bag& r_bag)
203 {
204  _GLIBCXX_DEBUG_ASSERT(p_r != 0);
205  if (p_l == 0)
206  {
207  apply_update(p_r, (node_update*)this);
208  return (p_r);
209  }
210 
211  if (p_l->m_type == leaf_node)
212  {
213  if (p_r->m_type == leaf_node)
214  {
215  node_pointer p_ret = rec_join(static_cast<leaf_pointer>(p_l),
216  static_cast<leaf_pointer>(p_r), r_bag);
217  apply_update(p_ret, (node_update*)this);
218  return p_ret;
219  }
220 
221  _GLIBCXX_DEBUG_ASSERT(p_r->m_type == i_node);
222  node_pointer p_ret = rec_join(static_cast<leaf_pointer>(p_l),
223  static_cast<inode_pointer>(p_r),
224  checked_ind, r_bag);
225  apply_update(p_ret, (node_update*)this);
226  return p_ret;
227  }
228 
229  _GLIBCXX_DEBUG_ASSERT(p_l->m_type == i_node);
230  if (p_r->m_type == leaf_node)
231  {
232  node_pointer p_ret = rec_join(static_cast<inode_pointer>(p_l),
233  static_cast<leaf_pointer>(p_r),
234  checked_ind, r_bag);
235  apply_update(p_ret, (node_update*)this);
236  return p_ret;
237  }
238 
239  _GLIBCXX_DEBUG_ASSERT(p_r->m_type == i_node);
240  node_pointer p_ret = rec_join(static_cast<inode_pointer>(p_l),
241  static_cast<inode_pointer>(p_r),
242  r_bag);
243 
244  apply_update(p_ret, (node_update*)this);
245  return p_ret;
246 }
247 
248 PB_DS_CLASS_T_DEC
249 typename PB_DS_CLASS_C_DEC::node_pointer
250 PB_DS_CLASS_C_DEC::
251 rec_join(leaf_pointer p_l, leaf_pointer p_r, branch_bag& r_bag)
252 {
253  _GLIBCXX_DEBUG_ASSERT(p_r != 0);
254  if (p_l == 0)
255  return (p_r);
256  node_pointer p_ret = insert_branch(p_l, p_r, r_bag);
257  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_ret) == 2);
258  return p_ret;
259 }
260 
261 PB_DS_CLASS_T_DEC
262 typename PB_DS_CLASS_C_DEC::node_pointer
263 PB_DS_CLASS_C_DEC::
264 rec_join(leaf_pointer p_l, inode_pointer p_r, size_type checked_ind,
265  branch_bag& r_bag)
266 {
267 #ifdef _GLIBCXX_DEBUG
268  const size_type lhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_l);
269  const size_type rhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_r);
270 #endif
271 
272  _GLIBCXX_DEBUG_ASSERT(p_r != 0);
273  node_pointer p_ret = rec_join(p_r, p_l, checked_ind, r_bag);
274  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_ret) == lhs_leafs + rhs_leafs);
275  return p_ret;
276 }
277 
278 PB_DS_CLASS_T_DEC
279 typename PB_DS_CLASS_C_DEC::node_pointer
280 PB_DS_CLASS_C_DEC::
281 rec_join(inode_pointer p_l, leaf_pointer p_r, size_type checked_ind, branch_bag& r_bag)
282 {
283  _GLIBCXX_DEBUG_ASSERT(p_l != 0);
284  _GLIBCXX_DEBUG_ASSERT(p_r != 0);
285 
286 #ifdef _GLIBCXX_DEBUG
287  const size_type lhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_l);
288  const size_type rhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_r);
289 #endif
290 
291  if (!p_l->should_be_mine(pref_begin(p_r), pref_end(p_r), checked_ind, this))
292  {
293  node_pointer p_ret = insert_branch(p_l, p_r, r_bag);
294  PB_DS_ASSERT_NODE_VALID(p_ret)
295  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_ret) ==
296  lhs_leafs + rhs_leafs);
297  return p_ret;
298  }
299 
300  node_pointer p_pot_child = p_l->add_child(p_r, pref_begin(p_r),
301  pref_end(p_r), this);
302  if (p_pot_child != p_r)
303  {
304  node_pointer p_new_child = rec_join(p_pot_child, p_r, p_l->get_e_ind(),
305  r_bag);
306 
307  p_l->replace_child(p_new_child, pref_begin(p_new_child),
308  pref_end(p_new_child), this);
309  }
310 
311  PB_DS_ASSERT_NODE_VALID(p_l)
312  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_l) == lhs_leafs + rhs_leafs);
313  return p_l;
314 }
315 
316 PB_DS_CLASS_T_DEC
317 typename PB_DS_CLASS_C_DEC::node_pointer
318 PB_DS_CLASS_C_DEC::
319 rec_join(inode_pointer p_l, inode_pointer p_r,
320  branch_bag& r_bag)
321 {
322  _GLIBCXX_DEBUG_ASSERT(p_l != 0);
323  _GLIBCXX_DEBUG_ASSERT(p_r != 0);
324 
325 #ifdef _GLIBCXX_DEBUG
326  const size_type lhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_l);
327  const size_type rhs_leafs = PB_DS_RECURSIVE_COUNT_LEAFS(p_r);
328 #endif
329 
330  if (p_l->get_e_ind() == p_r->get_e_ind() &&
331  synth_access_traits::equal_prefixes(p_l->pref_b_it(), p_l->pref_e_it(),
332  p_r->pref_b_it(), p_r->pref_e_it()))
333  {
334  for (typename inode::iterator it = p_r->begin();
335  it != p_r->end(); ++ it)
336  {
337  node_pointer p_new_child = rec_join(p_l->get_join_child(*it, this),
338  * it, 0, r_bag);
339  p_l->replace_child(p_new_child, pref_begin(p_new_child),
340  pref_end(p_new_child), this);
341  }
342 
343  p_r->~inode();
344  s_inode_allocator.deallocate(p_r, 1);
345  PB_DS_ASSERT_NODE_VALID(p_l)
346  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_l) == lhs_leafs + rhs_leafs);
347  return p_l;
348  }
349 
350  if (p_l->get_e_ind() < p_r->get_e_ind() &&
351  p_l->should_be_mine(p_r->pref_b_it(), p_r->pref_e_it(), 0, this))
352  {
353  node_pointer p_new_child = rec_join(p_l->get_join_child(p_r, this),
354  p_r, 0, r_bag);
355  p_l->replace_child(p_new_child, pref_begin(p_new_child),
356  pref_end(p_new_child), this);
357  PB_DS_ASSERT_NODE_VALID(p_l)
358  return p_l;
359  }
360 
361  if (p_r->get_e_ind() < p_l->get_e_ind() &&
362  p_r->should_be_mine(p_l->pref_b_it(), p_l->pref_e_it(), 0, this))
363  {
364  node_pointer p_new_child = rec_join(p_r->get_join_child(p_l, this), p_l,
365  0, r_bag);
366 
367  p_r->replace_child(p_new_child, pref_begin(p_new_child),
368  pref_end(p_new_child), this);
369 
370  PB_DS_ASSERT_NODE_VALID(p_r)
371  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_r) == lhs_leafs + rhs_leafs);
372  return p_r;
373  }
374 
375  node_pointer p_ret = insert_branch(p_l, p_r, r_bag);
376  PB_DS_ASSERT_NODE_VALID(p_ret)
377  _GLIBCXX_DEBUG_ASSERT(PB_DS_RECURSIVE_COUNT_LEAFS(p_ret) == lhs_leafs + rhs_leafs);
378  return p_ret;
379 }
380 
381 PB_DS_CLASS_T_DEC
382 inline std::pair<typename PB_DS_CLASS_C_DEC::iterator, bool>
383 PB_DS_CLASS_C_DEC::
384 insert(const_reference r_val)
385 {
386  node_pointer p_lf = find_imp(PB_DS_V2F(r_val));
387  if (p_lf != 0 && p_lf->m_type == leaf_node &&
388  synth_access_traits::equal_keys(PB_DS_V2F(static_cast<leaf_pointer>(p_lf)->value()), PB_DS_V2F(r_val)))
389  {
390  PB_DS_CHECK_KEY_EXISTS(PB_DS_V2F(r_val))
391  PB_DS_ASSERT_VALID((*this))
392  return std::make_pair(iterator(p_lf), false);
393  }
394 
395  PB_DS_CHECK_KEY_DOES_NOT_EXIST(PB_DS_V2F(r_val))
396 
397  leaf_pointer p_new_lf = s_leaf_allocator.allocate(1);
398  cond_dealtor cond(p_new_lf);
399 
400  new (p_new_lf) leaf(r_val);
401  apply_update(p_new_lf, (node_update*)this);
402  cond.set_call_destructor();
403  branch_bag bag;
404  bag.add_branch();
405  m_p_head->m_p_parent = rec_join(m_p_head->m_p_parent, p_new_lf, 0, bag);
406  m_p_head->m_p_parent->m_p_parent = m_p_head;
407  cond.set_no_action_dtor();
408  ++m_size;
409  update_min_max_for_inserted_leaf(p_new_lf);
410  _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(r_val));)
411  PB_DS_ASSERT_VALID((*this))
412  return std::make_pair(point_iterator(p_new_lf), true);
413 }
414 
415 PB_DS_CLASS_T_DEC
416 typename PB_DS_CLASS_C_DEC::size_type
417 PB_DS_CLASS_C_DEC::
418 keys_diff_ind(typename access_traits::const_iterator b_l,
419  typename access_traits::const_iterator e_l,
420  typename access_traits::const_iterator b_r,
421  typename access_traits::const_iterator e_r)
422 {
423  size_type diff_pos = 0;
424  while (b_l != e_l)
425  {
426  if (b_r == e_r)
427  return (diff_pos);
428  if (access_traits::e_pos(*b_l) != access_traits::e_pos(*b_r))
429  return (diff_pos);
430  ++b_l;
431  ++b_r;
432  ++diff_pos;
433  }
434  _GLIBCXX_DEBUG_ASSERT(b_r != e_r);
435  return diff_pos;
436 }
437 
438 PB_DS_CLASS_T_DEC
439 typename PB_DS_CLASS_C_DEC::inode_pointer
440 PB_DS_CLASS_C_DEC::
441 insert_branch(node_pointer p_l, node_pointer p_r, branch_bag& r_bag)
442 {
443  typename synth_access_traits::const_iterator left_b_it = pref_begin(p_l);
444  typename synth_access_traits::const_iterator left_e_it = pref_end(p_l);
445  typename synth_access_traits::const_iterator right_b_it = pref_begin(p_r);
446  typename synth_access_traits::const_iterator right_e_it = pref_end(p_r);
447 
448  const size_type diff_ind = keys_diff_ind(left_b_it, left_e_it,
449  right_b_it, right_e_it);
450 
451  inode_pointer p_new_nd = r_bag.get_branch();
452  new (p_new_nd) inode(diff_ind, left_b_it);
453  p_new_nd->add_child(p_l, left_b_it, left_e_it, this);
454  p_new_nd->add_child(p_r, right_b_it, right_e_it, this);
455  p_l->m_p_parent = p_new_nd;
456  p_r->m_p_parent = p_new_nd;
457  PB_DS_ASSERT_NODE_VALID(p_new_nd)
458  return (p_new_nd);
459 }
460 
461 PB_DS_CLASS_T_DEC
462 void
463 PB_DS_CLASS_C_DEC::
464 update_min_max_for_inserted_leaf(leaf_pointer p_new_lf)
465 {
466  if (m_p_head->m_p_min == m_p_head ||
467  synth_access_traits::cmp_keys(PB_DS_V2F(p_new_lf->value()),
468  PB_DS_V2F(static_cast<leaf_const_pointer>(m_p_head->m_p_min)->value())))
469  m_p_head->m_p_min = p_new_lf;
470 
471  if (m_p_head->m_p_max == m_p_head ||
472  synth_access_traits::cmp_keys(PB_DS_V2F(static_cast<leaf_const_pointer>(m_p_head->m_p_max)->value()), PB_DS_V2F(p_new_lf->value())))
473  m_p_head->m_p_max = p_new_lf;
474 }
475 #endif
std::pair::make_pair
constexpr pair< typename __decay_and_strip< _T1 >::__type, typename __decay_and_strip< _T2 >::__type > make_pair(_T1 &&__x, _T2 &&__y)
A convenience wrapper for creating a pair from two objects.
Definition: stl_pair.h:567
std
ISO C++ entities toplevel namespace is std.
std::pair
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:213