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/left_child_next_sibling_heap_/const_iterator.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 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 const_iterator.hpp
  38  * Contains an iterator class returned by the table's const find and insert
  39  *     methods.
  40  */
  41
  42 #ifndef PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_CONST_ITERATOR_HPP
  43 #define PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_CONST_ITERATOR_HPP
  44
  45 #include <ext/pb_ds/detail/left_child_next_sibling_heap_/const_point_iterator.hpp>
  46 #include <debug/debug.h>
  47
  48 namespace __gnu_pbds
  49 {
  50   namespace detail
  51   {
  52
  53 #define PB_DS_CLASS_C_DEC                                               \
  54     left_child_next_sibling_heap_const_iterator_<Node, Allocator>
  55
  56 #define PB_DS_BASE_C_DEC                                                \
  57     left_child_next_sibling_heap_node_const_point_iterator_<Node, Allocator>
  58
  59     // Const point-type iterator.
  60     template<typename Node, class Allocator>
  61     class left_child_next_sibling_heap_const_iterator_ : public PB_DS_BASE_C_DEC
  62     {
  63
  64     private:
  65       typedef typename PB_DS_BASE_C_DEC::node_pointer node_pointer;
  66
  67       typedef PB_DS_BASE_C_DEC base_type;
  68
  69     public:
  70
  71       // Category.
  72       typedef std::forward_iterator_tag iterator_category;
  73
  74       // Difference type.
  75       typedef typename Allocator::difference_type difference_type;
  76
  77       // Iterator's value type.
  78       typedef typename base_type::value_type value_type;
  79
  80       // Iterator's pointer type.
  81       typedef typename base_type::pointer pointer;
  82
  83       // Iterator's const pointer type.
  84       typedef typename base_type::const_pointer const_pointer;
  85
  86       // Iterator's reference type.
  87       typedef typename base_type::reference reference;
  88
  89       // Iterator's const reference type.
  90       typedef typename base_type::const_reference const_reference;
  91
  92     public:
  93
  94       inline
  95       left_child_next_sibling_heap_const_iterator_(node_pointer p_nd) : base_type(p_nd)
  96       { }
  97
  98       // Default constructor.
  99       inline
 100       left_child_next_sibling_heap_const_iterator_()
 101       { }
 102
 103       // Copy constructor.
 104       inline
 105       left_child_next_sibling_heap_const_iterator_(const PB_DS_CLASS_C_DEC& other) : base_type(other)
 106       { }
 107
 108       // Compares content to a different iterator object.
 109       inline bool
 110       operator==(const PB_DS_CLASS_C_DEC& other) const
 111       { return (base_type::m_p_nd == other.m_p_nd); }
 112
 113       // Compares content (negatively) to a different iterator object.
 114       inline bool
 115       operator!=(const PB_DS_CLASS_C_DEC& other) const
 116       { return (base_type::m_p_nd != other.m_p_nd); }
 117
 118       inline PB_DS_CLASS_C_DEC&
 119       operator++()
 120       {
 121         _GLIBCXX_DEBUG_ASSERT(base_type::m_p_nd != NULL);
 122         inc();
 123         return (*this);
 124       }
 125
 126       inline PB_DS_CLASS_C_DEC
 127       operator++(int)
 128       {
 129         PB_DS_CLASS_C_DEC ret_it(base_type::m_p_nd);
 130         operator++();
 131         return (ret_it);
 132       }
 133
 134     private:
 135       void
 136       inc()
 137       {
 138         if (base_type::m_p_nd->m_p_next_sibling != NULL)
 139           {
 140             base_type::m_p_nd = base_type::m_p_nd->m_p_next_sibling;
 141             while (base_type::m_p_nd->m_p_l_child != NULL)
 142               base_type::m_p_nd = base_type::m_p_nd->m_p_l_child;
 143             return;
 144           }
 145
 146         while (true)
 147           {
 148             node_pointer p_next = base_type::m_p_nd;
 149             base_type::m_p_nd = base_type::m_p_nd->m_p_prev_or_parent;
 150             if (base_type::m_p_nd == NULL || base_type::m_p_nd->m_p_l_child == p_next)
 151               return;
 152           }
 153       }
 154     };
 155
 156 #undef PB_DS_CLASS_C_DEC
 157 #undef PB_DS_BASE_C_DEC
 158
 159   } // namespace detail
 160 } // namespace __gnu_pbds
 161
 162 #endif