release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2007, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  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
  23 // <http://www.gnu.org/licenses/>.
  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
  29 // notice appears in all copies, and that both that copyright notice
  30 // and this permission notice appear in supporting documentation. None
  31 // of the above authors, nor IBM Haifa Research Laboratories, make any
  32 // representation about the suitability of this software for any
  33 // purpose. It is provided "as is" without express or implied
  34 // warranty.
  35
  36 /**
  37  * @file node_iterators.hpp
  38  * Contains an implementation class for ov_tree_.
  39  */
  40
  41 #ifndef PB_DS_OV_TREE_NODE_ITERATORS_HPP
  42 #define PB_DS_OV_TREE_NODE_ITERATORS_HPP
  43
  44 #include <ext/pb_ds/tag_and_trait.hpp>
  45 #include <ext/pb_ds/detail/type_utils.hpp>
  46 #include <debug/debug.h>
  47
  48 namespace __gnu_pbds
  49 {
  50   namespace detail
  51   {
  52
  53 #define PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC \
  54     ov_tree_node_const_it_<Value_Type, Metadata_Type, Allocator>
  55
  56     // Const node reference.
  57     template<typename Value_Type, typename Metadata_Type, class Allocator>
  58     class ov_tree_node_const_it_
  59     {
  60
  61     protected:
  62       typedef
  63       typename Allocator::template rebind<
  64       Value_Type>::other::pointer
  65       pointer;
  66
  67       typedef
  68       typename Allocator::template rebind<
  69         Value_Type>::other::const_pointer
  70       const_pointer;
  71
  72       typedef
  73       typename Allocator::template rebind<
  74         Metadata_Type>::other::const_pointer
  75       const_metadata_pointer;
  76
  77       typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC this_type;
  78
  79     protected:
  80
  81       template<typename Ptr>
  82       inline static Ptr
  83       mid_pointer(Ptr p_begin, Ptr p_end)
  84       {
  85         _GLIBCXX_DEBUG_ASSERT(p_end >= p_begin);
  86         return (p_begin + (p_end - p_begin) / 2);
  87       }
  88
  89     public:
  90
  91       typedef trivial_iterator_tag iterator_category;
  92
  93       typedef trivial_iterator_difference_type difference_type;
  94
  95       typedef
  96       typename Allocator::template rebind<
  97         Value_Type>::other::const_pointer
  98       value_type;
  99
 100       typedef
 101       typename Allocator::template rebind<
 102         typename remove_const<
 103         Value_Type>::type>::other::const_pointer
 104       reference;
 105
 106       typedef
 107       typename Allocator::template rebind<
 108         typename remove_const<
 109         Value_Type>::type>::other::const_pointer
 110       const_reference;
 111
 112       typedef Metadata_Type metadata_type;
 113
 114       typedef
 115       typename Allocator::template rebind<
 116         metadata_type>::other::const_reference
 117       const_metadata_reference;
 118
 119     public:
 120       inline
 121       ov_tree_node_const_it_(const_pointer p_nd = NULL,  const_pointer p_begin_nd = NULL,  const_pointer p_end_nd = NULL,  const_metadata_pointer p_metadata = NULL) : m_p_value(const_cast<pointer>(p_nd)), m_p_begin_value(const_cast<pointer>(p_begin_nd)), m_p_end_value(const_cast<pointer>(p_end_nd)), m_p_metadata(p_metadata)
 122       { }
 123
 124       inline const_reference
 125       operator*() const
 126       { return m_p_value; }
 127
 128       inline const_metadata_reference
 129       get_metadata() const
 130       {
 131         enum
 132           {
 133             has_metadata = !is_same<Metadata_Type, null_node_metadata>::value
 134           };
 135
 136         PB_DS_STATIC_ASSERT(should_have_metadata, has_metadata);
 137         _GLIBCXX_DEBUG_ASSERT(m_p_metadata != NULL);
 138         return *m_p_metadata;
 139       }
 140
 141       inline this_type
 142       get_l_child() const
 143       {
 144         if (m_p_begin_value == m_p_value)
 145           return (this_type(m_p_begin_value, m_p_begin_value, m_p_begin_value));
 146
 147         const_metadata_pointer p_begin_metadata =
 148           m_p_metadata - (m_p_value - m_p_begin_value);
 149
 150         return (this_type(mid_pointer(m_p_begin_value, m_p_value),
 151                           m_p_begin_value,
 152                           m_p_value,
 153                           mid_pointer(p_begin_metadata, m_p_metadata)));
 154       }
 155
 156       inline this_type
 157       get_r_child() const
 158       {
 159         if (m_p_value == m_p_end_value)
 160           return (this_type(m_p_end_value,  m_p_end_value,  m_p_end_value));
 161
 162         const_metadata_pointer p_end_metadata =
 163           m_p_metadata + (m_p_end_value - m_p_value);
 164
 165         return (this_type(mid_pointer(m_p_value + 1, m_p_end_value),
 166                           m_p_value + 1,
 167                           m_p_end_value,(m_p_metadata == NULL) ?
 168                           NULL : mid_pointer(m_p_metadata + 1, p_end_metadata)));
 169       }
 170
 171       inline bool
 172       operator==(const this_type& other) const
 173       {
 174         const bool is_end = m_p_begin_value == m_p_end_value;
 175         const bool is_other_end = other.m_p_begin_value == other.m_p_end_value;
 176
 177         if (is_end)
 178           return (is_other_end);
 179
 180         if (is_other_end)
 181           return (is_end);
 182
 183         return m_p_value == other.m_p_value;
 184       }
 185
 186       inline bool
 187       operator!=(const this_type& other) const
 188       { return !operator==(other); }
 189
 190     public:
 191       pointer m_p_value;
 192       pointer m_p_begin_value;
 193       pointer m_p_end_value;
 194
 195       const_metadata_pointer m_p_metadata;
 196     };
 197
 198 #define PB_DS_OV_TREE_NODE_ITERATOR_C_DEC \
 199     ov_tree_node_it_<Value_Type, Metadata_Type, Allocator>
 200
 201     // Node reference.
 202     template<typename Value_Type, typename Metadata_Type, class Allocator>
 203     class ov_tree_node_it_ : public PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC
 204     {
 205
 206     private:
 207       typedef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC this_type;
 208
 209       typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC base_type;
 210
 211       typedef typename base_type::pointer pointer;
 212
 213       typedef typename base_type::const_pointer const_pointer;
 214
 215       typedef
 216       typename base_type::const_metadata_pointer
 217       const_metadata_pointer;
 218
 219     public:
 220
 221       typedef trivial_iterator_tag iterator_category;
 222
 223       typedef trivial_iterator_difference_type difference_type;
 224
 225       typedef
 226       typename Allocator::template rebind<
 227         Value_Type>::other::pointer
 228       value_type;
 229
 230       typedef
 231       typename Allocator::template rebind<
 232         typename remove_const<
 233         Value_Type>::type>::other::pointer
 234       reference;
 235
 236       typedef
 237       typename Allocator::template rebind<
 238         typename remove_const<
 239         Value_Type>::type>::other::pointer
 240       const_reference;
 241
 242     public:
 243       inline
 244       ov_tree_node_it_(const_pointer p_nd = NULL,  const_pointer p_begin_nd = NULL,  const_pointer p_end_nd = NULL,  const_metadata_pointer p_metadata = NULL) : base_type(p_nd,  p_begin_nd,  p_end_nd,  p_metadata)
 245       { }
 246
 247       // Access.
 248       inline reference
 249       operator*() const
 250       { return reference(base_type::m_p_value); }
 251
 252       // Returns the node reference associated with the left node.
 253       inline ov_tree_node_it_
 254       get_l_child() const
 255       {
 256         if (base_type::m_p_begin_value == base_type::m_p_value)
 257           return (this_type(base_type::m_p_begin_value,  base_type::m_p_begin_value,  base_type::m_p_begin_value));
 258
 259         const_metadata_pointer p_begin_metadata =
 260           base_type::m_p_metadata - (base_type::m_p_value - base_type::m_p_begin_value);
 261
 262         return (this_type(base_type::mid_pointer(base_type::m_p_begin_value, base_type::m_p_value),
 263                           base_type::m_p_begin_value,
 264                           base_type::m_p_value,
 265                           base_type::mid_pointer(p_begin_metadata, base_type::m_p_metadata)));
 266       }
 267
 268       // Returns the node reference associated with the right node.
 269       inline ov_tree_node_it_
 270       get_r_child() const
 271       {
 272         if (base_type::m_p_value == base_type::m_p_end_value)
 273           return (this_type(base_type::m_p_end_value,  base_type::m_p_end_value,  base_type::m_p_end_value));
 274
 275         const_metadata_pointer p_end_metadata =
 276           base_type::m_p_metadata + (base_type::m_p_end_value - base_type::m_p_value);
 277
 278         return (this_type(base_type::mid_pointer(base_type::m_p_value + 1, base_type::m_p_end_value),
 279                           base_type::m_p_value + 1,
 280                           base_type::m_p_end_value,(base_type::m_p_metadata == NULL)?
 281                           NULL : base_type::mid_pointer(base_type::m_p_metadata + 1, p_end_metadata)));
 282       }
 283
 284     };
 285
 286 #undef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC
 287 #undef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC
 288
 289 } // namespace detail
 290 } // namespace __gnu_pbds
 291
 292 #endif