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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libstdc++-v3/] [include/] [ext/] [pb_assoc/] [detail/] [tree_policy/] [order_statistics_imp.hpp] - Blame information for rev 17

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1 17 jlechner
// -*- C++ -*-
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// Copyright (C) 2005 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library.  This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING.  If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction.  Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License.  This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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30
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice and
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// this permission notice appear in supporting documentation. None of
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// the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied warranty.
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/*
41
 * @file order_statistics_imp.hpp
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 * Contains forward declarations for order_statistics_key
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 */
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#ifndef ORDER_STATISTICS_IMP_HPP
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#define ORDER_STATISTICS_IMP_HPP
47
 
48
#define PB_ASSOC_CLASS_T_DEC \
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        template<class Key, class Allocator>
50
 
51
#define PB_ASSOC_CLASS_C_DEC \
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        order_statistics_key< \
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                Key, \
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                Allocator>
55
 
56
PB_ASSOC_CLASS_T_DEC
57
inline
58
PB_ASSOC_CLASS_C_DEC::
59
order_statistics_key(const_key_reference r_key) :
60
  m_key(r_key),
61
  m_rank(1)
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{ }
63
 
64
PB_ASSOC_CLASS_T_DEC
65
inline
66
PB_ASSOC_CLASS_C_DEC::
67
operator typename PB_ASSOC_CLASS_C_DEC::key_reference()
68
{
69
  return (m_key);
70
}
71
 
72
PB_ASSOC_CLASS_T_DEC
73
inline
74
PB_ASSOC_CLASS_C_DEC::
75
operator typename PB_ASSOC_CLASS_C_DEC::key_type() const
76
{
77
  return (m_key);
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}
79
 
80
#undef PB_ASSOC_CLASS_T_DEC
81
 
82
#undef PB_ASSOC_CLASS_C_DEC
83
 
84
#define PB_ASSOC_CLASS_T_DEC \
85
        template<class Cmp_Fn, class Allocator>
86
 
87
#define PB_ASSOC_CLASS_C_DEC \
88
        order_statistics_key_cmp< \
89
                Cmp_Fn, \
90
                Allocator>
91
 
92
PB_ASSOC_CLASS_T_DEC
93
inline
94
PB_ASSOC_CLASS_C_DEC::
95
order_statistics_key_cmp()
96
{ }
97
 
98
PB_ASSOC_CLASS_T_DEC
99
inline
100
PB_ASSOC_CLASS_C_DEC::
101
order_statistics_key_cmp(const Cmp_Fn& r_cmp_fn) :
102
  Cmp_Fn(r_cmp_fn)
103
{ }
104
 
105
PB_ASSOC_CLASS_T_DEC
106
inline bool
107
PB_ASSOC_CLASS_C_DEC::
108
operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const
109
{
110
  return Cmp_Fn::operator()((key_type)r_lhs_key, (key_type)r_rhs_key);
111
}
112
 
113
PB_ASSOC_CLASS_T_DEC
114
inline typename PB_ASSOC_CLASS_C_DEC::cmp_fn&
115
PB_ASSOC_CLASS_C_DEC::
116
get_cmp_fn()
117
{
118
  return (*this);
119
}
120
 
121
PB_ASSOC_CLASS_T_DEC
122
inline const typename PB_ASSOC_CLASS_C_DEC::cmp_fn&
123
PB_ASSOC_CLASS_C_DEC::
124
get_cmp_fn() const
125
{
126
  return (*this);
127
}
128
 
129
#undef PB_ASSOC_CLASS_T_DEC
130
 
131
#undef PB_ASSOC_CLASS_C_DEC
132
 
133
#define PB_ASSOC_CLASS_T_DEC \
134
        template<class Key, class Allocator>
135
 
136
#define PB_ASSOC_CLASS_C_DEC \
137
        order_statistics_node_updator< \
138
                Key, \
139
                Allocator>
140
 
141
PB_ASSOC_CLASS_T_DEC
142
inline void
143
PB_ASSOC_CLASS_C_DEC::
144
operator()(const_key_pointer p_key, const_key_pointer p_l_child_key, const_key_pointer p_r_child_key)
145
{
146
  /*
147
   * The left rank is 0 if there is no left child,
148
   *    or the rank of the left child, otherwise.
149
   */
150
  const size_type l_rank =(p_l_child_key == NULL)? 0 : p_l_child_key->m_rank;
151
 
152
  /*
153
   * The right rank is 0 if there is no right child,
154
   *    or the rank of the right child, otherwise.
155
   */
156
  const size_type r_rank =(p_r_child_key == NULL)? 0 : p_r_child_key->m_rank;
157
 
158
  /*
159
   * The rand of the entry is the sumb of the ranks of its
160
   *    children + 1 (for itself).
161
   */
162
  p_key->m_rank = 1 + l_rank + r_rank;
163
}
164
 
165
PB_ASSOC_CLASS_T_DEC
166
inline void
167
PB_ASSOC_CLASS_C_DEC::
168
swap(PB_ASSOC_CLASS_C_DEC& /*r_other*/)
169
{ }
170
 
171
#undef PB_ASSOC_CLASS_T_DEC
172
 
173
#undef PB_ASSOC_CLASS_C_DEC
174
 
175
#define PB_ASSOC_CLASS_T_DEC \
176
        template<class Cntnr>
177
 
178
#define PB_ASSOC_CLASS_C_DEC \
179
        find_by_order< \
180
                Cntnr>
181
 
182
PB_ASSOC_CLASS_T_DEC
183
inline typename PB_ASSOC_CLASS_C_DEC::iterator
184
PB_ASSOC_CLASS_C_DEC::
185
operator()(Cntnr& r_c, size_type order) const
186
{
187
  return find(r_c, order);
188
}
189
 
190
PB_ASSOC_CLASS_T_DEC
191
inline typename PB_ASSOC_CLASS_C_DEC::const_iterator
192
PB_ASSOC_CLASS_C_DEC::
193
operator()(const Cntnr& r_c, size_type order) const
194
{
195
  return find(r_c, order);
196
}
197
 
198
PB_ASSOC_CLASS_T_DEC
199
inline typename PB_ASSOC_CLASS_C_DEC::const_iterator
200
PB_ASSOC_CLASS_C_DEC::
201
find(const Cntnr& r_c, size_type order)
202
{
203
  if (order > r_c.size())
204
    return (r_c.end());
205
 
206
  /*
207
   * Start at the top of the tree.
208
   */
209
  typename Cntnr::const_node_iterator it = r_c.node_begin();
210
 
211
  /*
212
   * Loop up to a leaf.
213
   */
214
  while (it != r_c.node_end())
215
    {
216
      typename Cntnr::const_node_iterator l_it = it.l_child();
217
 
218
      /*
219
       * The order of the element, o, is the rank of the left
220
       *        child (for the entry itself).
221
       */
222
      const size_type o = (l_it == r_c.node_end())?
223
 
224
 
225
      /*
226
       * If the current order, o, is the order requested,
227
       *        the key has been found.
228
       */
229
      if (order == o)
230
        return (*it);
231
      /*
232
       * If the current order, o, is larger than the order requested,
233
       *        we should move to the left subtree.
234
       */
235
      else if (order < o)
236
        it = l_it;
237
      /*
238
       * Otherwise adujst the requested order and move to the right subtree.
239
       */
240
      else
241
        {
242
          order -= o + 1;
243
 
244
          it = it.r_child();
245
        }
246
    }
247
 
248
  return (r_c.end());
249
}
250
 
251
PB_ASSOC_CLASS_T_DEC
252
inline typename PB_ASSOC_CLASS_C_DEC::iterator
253
PB_ASSOC_CLASS_C_DEC::
254
find(Cntnr& r_c, size_type order)
255
{
256
  if (order > r_c.size())
257
    return (r_c.end());
258
 
259
  /*
260
   * Start at the top of the tree.
261
   */
262
  typename Cntnr::node_iterator it = r_c.node_begin();
263
 
264
  /*
265
   * Loop up to a leaf.
266
   */
267
  while (it != r_c.node_end())
268
    {
269
      typename Cntnr::node_iterator l_it = it.l_child();
270
 
271
      /*
272
       * The order of the element, o, is the rank of the left
273
       *        child (for the entry itself).
274
       */
275
      const size_type o = (l_it == r_c.node_end())?
276
 
277
        r_c.extract_key(*(*l_it)).m_rank;
278
 
279
      /*
280
       * If the current order, o, is the order requested,
281
       *        the key has been found.
282
       */
283
      if (order == o)
284
        return (*it);
285
      /*
286
       * If the current order, o, is larger than the order requested,
287
       *        we should move to the left subtree.
288
       */
289
      else if (order < o)
290
        it = l_it;
291
      /*
292
       * Otherwise adujst the requested order and move to the right subtree.
293
       */
294
      else
295
        {
296
          order -= o + 1;
297
 
298
          it = it.r_child();
299
        }
300
    }
301
 
302
  return (r_c.end());
303
}
304
 
305
#undef PB_ASSOC_CLASS_T_DEC
306
 
307
#undef PB_ASSOC_CLASS_C_DEC
308
 
309
#define PB_ASSOC_CLASS_T_DEC \
310
        template<class Cntnr>
311
 
312
#define PB_ASSOC_CLASS_C_DEC \
313
        order_by_key< \
314
                Cntnr>
315
 
316
PB_ASSOC_CLASS_T_DEC
317
inline typename PB_ASSOC_CLASS_C_DEC::size_type
318
PB_ASSOC_CLASS_C_DEC::
319
operator()(const Cntnr& r_c, const underlying_key_type& r_key) const
320
{
321
  /*
322
   * The logic here is similar to that in order_by_key.
323
   */
324
 
325
  typename Cntnr::const_node_iterator it = r_c.node_begin();
326
 
327
  size_type ord = 0;
328
 
329
  while (it != r_c.node_end())
330
    {
331
      typename Cntnr::const_node_iterator l_it = it.l_child();
332
 
333
      if (r_c.get_cmp_fn().get_cmp_fn()(
334
                                        r_key,
335
                                        r_c.extract_key(*(*it)).m_key))
336
        it = l_it;
337
      else if (r_c.get_cmp_fn().get_cmp_fn()(
338
                                             r_c.extract_key(*(*it)).m_key,
339
                                             r_key))
340
        {
341
 
342
          ord += (l_it == r_c.node_end())?
343
            1 :
344
            1 + r_c.extract_key(*(*l_it)).m_rank;
345
 
346
          it = it.r_child();
347
        }
348
      else
349
        {
350
          ord += (l_it == r_c.node_end())?
351
 
352
            r_c.extract_key(*(*l_it)).m_rank;
353
 
354
          it = r_c.node_end();
355
        }
356
    }
357
 
358
  return (ord);
359
}
360
 
361
#undef PB_ASSOC_CLASS_T_DEC
362
 
363
#undef PB_ASSOC_CLASS_C_DEC
364
 
365
#define PB_ASSOC_CLASS_T_DEC \
366
        template<class Cntnr, class Allocator>
367
 
368
#define PB_ASSOC_CLASS_C_DEC \
369
        order_statistics_key_verifier< \
370
                Cntnr, \
371
                Allocator>
372
 
373
template<class Cntnr, class Allocator = std::allocator<char> >
374
class order_statistics_key_verifier
375
{
376
public:
377
  typedef Cntnr map;
378
 
379
  typedef Allocator allocator;
380
 
381
  typedef typename allocator::size_type size_type;
382
 
383
  typedef
384
  typename allocator::template rebind<map>::other::const_reference
385
  const_map_reference;
386
 
387
public:
388
  bool
389
  operator()(const Cntnr& r_c) const;
390
 
391
private:
392
  typedef typename Cntnr::const_node_iterator const_node_iterator;
393
 
394
  typedef typename Cntnr::const_iterator cntnr_const_it;
395
 
396
  typedef std::pair<bool, size_type> stat;
397
 
398
private:
399
  static stat
400
  verify_imp(const_node_iterator it, const_node_iterator end_it)
401
  {
402
    if (it == end_it)
403
      return (std::make_pair(true, 0));
404
 
405
    const stat l_ret =
406
      verify_imp(it.l_child(), end_it);
407
 
408
    const stat r_ret =
409
      verify_imp(it.r_child(), end_it);
410
 
411
    if (!l_ret.first || !r_ret.first)
412
      return (std::make_pair(false, 0));
413
 
414
    if ((*it)->m_rank != 1 + l_ret.second + r_ret.second)
415
      return (std::make_pair(false, 0));
416
 
417
    return (std::make_pair(true, (*it)->m_rank));
418
  }
419
};
420
 
421
PB_ASSOC_CLASS_T_DEC
422
bool
423
PB_ASSOC_CLASS_C_DEC::
424
operator()(const Cntnr& r_c) const
425
{
426
  const stat top_stat =
427
    verify_imp(r_c.node_begin(), r_c.node_end());
428
 
429
  return (top_stat.first);
430
}
431
 
432
#undef PB_ASSOC_CLASS_T_DEC
433
 
434
#undef PB_ASSOC_CLASS_C_DEC
435
 
436
#endif // #ifndef ORDER_STATISTICS_IMP_HPP

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