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   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file left_child_next_sibling_heap_.hpp
  44  * Contains an implementation class for a basic heap.
  45  */
  46
  47 #ifndef PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_HPP
  48 #define PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_HPP
  49
  50 /*
  51  * Based on CLRS.
  52  */
  53
  54 #include <iterator>
  55 #include <ext/pb_ds/detail/cond_dealtor.hpp>
  56 #include <ext/pb_ds/detail/type_utils.hpp>
  57 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/node.hpp>
  58 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/const_point_iterator.hpp>
  59 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/const_iterator.hpp>
  60 #ifdef PB_DS_LC_NS_HEAP_TRACE_
  61 #include <iostream>
  62 #endif
  63 #include <debug/debug.h>
  64
  65 namespace __gnu_pbds
  66 {
  67   namespace detail
  68   {
  69
  70 #ifdef _GLIBCXX_DEBUG
  71 #define PB_DS_CLASS_T_DEC                                               \
  72     template<                                                           \
  73                                                 typename Value_Type,    \
  74                                                 class Cmp_Fn,           \
  75                                                 typename Node_Metadata, \
  76                                                 class Allocator,        \
  77                                                 bool Single_Link_Roots>
  78 #else
  79 #define PB_DS_CLASS_T_DEC                                               \
  80     template<                                                           \
  81                                                 typename Value_Type,    \
  82                                                 class Cmp_Fn,           \
  83                                                 typename Node_Metadata, \
  84                                                 class Allocator>
  85 #endif
  86
  87 #ifdef _GLIBCXX_DEBUG
  88 #define PB_DS_CLASS_C_DEC                                               \
  89     left_child_next_sibling_heap_<                                      \
  90                                                         Value_Type,     \
  91                                                         Cmp_Fn,         \
  92                                                         Node_Metadata,  \
  93                                                         Allocator,      \
  94                                                         Single_Link_Roots>
  95 #else
  96 #define PB_DS_CLASS_C_DEC                                               \
  97     left_child_next_sibling_heap_<                                      \
  98                                                         Value_Type,     \
  99                                                         Cmp_Fn,         \
 100                                                         Node_Metadata,  \
 101                                                         Allocator>
 102 #endif
 103
 104     /**
 105      * class description = "Base class for some types of h3ap$">
 106      **/
 107 #ifdef _GLIBCXX_DEBUG
 108     template<typename Value_Type,
 109              class Cmp_Fn,
 110              typename Node_Metadata,
 111              class Allocator,
 112              bool Single_Link_Roots>
 113 #else
 114     template<typename Value_Type,
 115              class Cmp_Fn,
 116              typename Node_Metadata,
 117              class Allocator>
 118 #endif
 119     class left_child_next_sibling_heap_ : public Cmp_Fn
 120     {
 121
 122     protected:
 123       typedef
 124       typename Allocator::template rebind<
 125       left_child_next_sibling_heap_node_<
 126       Value_Type,
 127       Node_Metadata,
 128       Allocator> >::other
 129       node_allocator;
 130
 131       typedef typename node_allocator::value_type node;
 132
 133       typedef typename node_allocator::pointer node_pointer;
 134
 135       typedef typename node_allocator::const_pointer const_node_pointer;
 136
 137       typedef Node_Metadata node_metadata;
 138
 139       typedef std::pair< node_pointer, node_pointer> node_pointer_pair;
 140
 141     private:
 142       typedef cond_dealtor< node, Allocator> cond_dealtor_t;
 143
 144       enum
 145         {
 146           simple_value = is_simple<Value_Type>::value
 147         };
 148
 149       typedef integral_constant<int, simple_value> no_throw_copies_t;
 150
 151     public:
 152
 153       typedef typename Allocator::size_type size_type;
 154
 155       typedef typename Allocator::difference_type difference_type;
 156
 157       typedef Value_Type value_type;
 158
 159       typedef
 160       typename Allocator::template rebind<
 161         value_type>::other::pointer
 162       pointer;
 163
 164       typedef
 165       typename Allocator::template rebind<
 166         value_type>::other::const_pointer
 167       const_pointer;
 168
 169       typedef
 170       typename Allocator::template rebind<
 171         value_type>::other::reference
 172       reference;
 173
 174       typedef
 175       typename Allocator::template rebind<
 176         value_type>::other::const_reference
 177       const_reference;
 178
 179       typedef
 180       left_child_next_sibling_heap_node_const_point_iterator_<
 181         node,
 182         Allocator>
 183       const_point_iterator;
 184
 185       typedef const_point_iterator point_iterator;
 186
 187       typedef
 188       left_child_next_sibling_heap_const_iterator_<
 189         node,
 190         Allocator>
 191       const_iterator;
 192
 193       typedef const_iterator iterator;
 194
 195       typedef Cmp_Fn cmp_fn;
 196
 197       typedef Allocator allocator;
 198
 199     public:
 200
 201       left_child_next_sibling_heap_();
 202
 203       left_child_next_sibling_heap_(const Cmp_Fn& r_cmp_fn);
 204
 205       left_child_next_sibling_heap_(const PB_DS_CLASS_C_DEC& other);
 206
 207       void
 208       swap(PB_DS_CLASS_C_DEC& other);
 209
 210       ~left_child_next_sibling_heap_();
 211
 212       inline bool
 213       empty() const;
 214
 215       inline size_type
 216       size() const;
 217
 218       inline size_type
 219       max_size() const;
 220
 221       Cmp_Fn&
 222       get_cmp_fn();
 223
 224       const Cmp_Fn&
 225       get_cmp_fn() const;
 226
 227       inline iterator
 228       begin();
 229
 230       inline const_iterator
 231       begin() const;
 232
 233       inline iterator
 234       end();
 235
 236       inline const_iterator
 237       end() const;
 238
 239       void
 240       clear();
 241
 242 #ifdef PB_DS_LC_NS_HEAP_TRACE_
 243       void
 244       trace() const;
 245 #endif
 246
 247     protected:
 248
 249       inline node_pointer
 250       get_new_node_for_insert(const_reference r_val);
 251
 252       inline static void
 253       make_child_of(node_pointer p_nd, node_pointer p_new_parent);
 254
 255       void
 256       value_swap(PB_DS_CLASS_C_DEC& other);
 257
 258       inline static node_pointer
 259       parent(node_pointer p_nd);
 260
 261       inline void
 262       swap_with_parent(node_pointer p_nd, node_pointer p_parent);
 263
 264       void
 265       bubble_to_top(node_pointer p_nd);
 266
 267       inline void
 268       actual_erase_node(node_pointer p_nd);
 269
 270       void
 271       clear_imp(node_pointer p_nd);
 272
 273       void
 274       to_linked_list();
 275
 276       template<typename Pred>
 277       node_pointer
 278       prune(Pred pred);
 279
 280 #ifdef _GLIBCXX_DEBUG
 281       void
 282       assert_valid() const;
 283
 284       void
 285       assert_node_consistent(const_node_pointer p_nd, bool single_link) const;
 286
 287       static size_type
 288       size_under_node(const_node_pointer p_nd);
 289
 290       static size_type
 291       degree(const_node_pointer p_nd);
 292 #endif
 293
 294 #ifdef PB_DS_LC_NS_HEAP_TRACE_
 295       static void
 296       trace_node(const_node_pointer, size_type level);
 297 #endif
 298
 299     protected:
 300       node_pointer m_p_root;
 301
 302       size_type m_size;
 303
 304     private:
 305 #ifdef _GLIBCXX_DEBUG
 306       void
 307       assert_iterators() const;
 308
 309       void
 310       assert_size() const;
 311
 312       static size_type
 313       size_from_node(const_node_pointer p_nd);
 314 #endif
 315
 316       node_pointer
 317       recursive_copy_node(const_node_pointer p_nd);
 318
 319       inline node_pointer
 320       get_new_node_for_insert(const_reference r_val, false_type);
 321
 322       inline node_pointer
 323       get_new_node_for_insert(const_reference r_val, true_type);
 324
 325 #ifdef PB_DS_LC_NS_HEAP_TRACE_
 326       template<typename Metadata_>
 327       static void
 328       trace_node_metadata(const_node_pointer p_nd, type_to_type<Metadata_>);
 329
 330       static void
 331       trace_node_metadata(const_node_pointer, type_to_type<null_left_child_next_sibling_heap_node_metadata>);
 332 #endif
 333
 334     private:
 335       static node_allocator s_node_allocator;
 336
 337       static no_throw_copies_t s_no_throw_copies_ind;
 338     };
 339
 340 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/constructors_destructor_fn_imps.hpp>
 341 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/iterators_fn_imps.hpp>
 342 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/debug_fn_imps.hpp>
 343 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/trace_fn_imps.hpp>
 344 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/insert_fn_imps.hpp>
 345 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/erase_fn_imps.hpp>
 346 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/info_fn_imps.hpp>
 347 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/policy_access_fn_imps.hpp>
 348
 349 #undef PB_DS_CLASS_C_DEC
 350 #undef PB_DS_CLASS_T_DEC
 351
 352   } // namespace detail
 353 } // namespace __gnu_pbds
 354
 355 #endif