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/binary_heap_/insert_fn_imps.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 insert_fn_imps.hpp
  38  * Contains an implementation class for a binary_heap.
  39  */
  40
  41 PB_DS_CLASS_T_DEC
  42 inline typename PB_DS_CLASS_C_DEC::point_iterator
  43 PB_DS_CLASS_C_DEC::
  44 push(const_reference r_val)
  45 {
  46   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  47   insert_value(r_val, s_no_throw_copies_ind);
  48   std::push_heap(m_a_entries, m_a_entries + m_size,
  49                  static_cast<entry_cmp&>(*this));
  50   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  51   return point_iterator(m_a_entries);
  52 }
  53
  54 PB_DS_CLASS_T_DEC
  55 inline void
  56 PB_DS_CLASS_C_DEC::
  57 insert_value(value_type val, true_type)
  58 {
  59   resize_for_insert_if_needed();
  60
  61   m_a_entries[m_size++] = val;
  62 }
  63
  64 PB_DS_CLASS_T_DEC
  65 inline void
  66 PB_DS_CLASS_C_DEC::
  67 insert_value(const_reference r_val, false_type)
  68 {
  69   resize_for_insert_if_needed();
  70   pointer p_new = s_value_allocator.allocate(1);
  71   cond_dealtor_t cond(p_new);
  72   new (p_new) value_type(r_val);
  73   cond.set_no_action();
  74   m_a_entries[m_size++] = p_new;
  75 }
  76
  77 PB_DS_CLASS_T_DEC
  78 inline void
  79 PB_DS_CLASS_C_DEC::
  80 insert_entry(entry e)
  81 {
  82   resize_for_insert_if_needed();
  83   m_a_entries[m_size++] = e;
  84 }
  85
  86 PB_DS_CLASS_T_DEC
  87 inline void
  88 PB_DS_CLASS_C_DEC::
  89 resize_for_insert_if_needed()
  90 {
  91   if (!resize_policy::resize_needed_for_grow(m_size))
  92     {
  93       _GLIBCXX_DEBUG_ASSERT(m_size < m_actual_size);
  94       return;
  95     }
  96
  97   const size_type new_actual_size = resize_policy::get_new_size_for_grow();
  98   entry_pointer a_new_entries = s_entry_allocator.allocate(new_actual_size);
  99   resize_policy::notify_grow_resize();
 100   std::copy(m_a_entries, m_a_entries + m_size, a_new_entries);
 101   s_entry_allocator.deallocate(m_a_entries, m_actual_size);
 102   m_actual_size = new_actual_size;
 103   m_a_entries = a_new_entries;
 104 }
 105
 106 PB_DS_CLASS_T_DEC
 107 void
 108 PB_DS_CLASS_C_DEC::
 109 modify(point_iterator it, const_reference r_new_val)
 110 {
 111   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 112   swap_value_imp(it.m_p_e, r_new_val, s_no_throw_copies_ind);
 113   fix(it.m_p_e);
 114   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 115 }
 116
 117 PB_DS_CLASS_T_DEC
 118 void
 119 PB_DS_CLASS_C_DEC::
 120 fix(entry_pointer p_e)
 121 {
 122   size_type i = p_e - m_a_entries;
 123   if (i > 0 && entry_cmp::operator()(m_a_entries[parent(i)], m_a_entries[i]))
 124     {
 125       size_type parent_i = parent(i);
 126       while (i > 0
 127              && entry_cmp::operator()(m_a_entries[parent_i], m_a_entries[i]))
 128         {
 129           std::swap(m_a_entries[i], m_a_entries[parent_i]);
 130           i = parent_i;
 131           parent_i = parent(i);
 132         }
 133
 134       _GLIBCXX_DEBUG_ONLY(assert_valid();)
 135       return;
 136     }
 137
 138   while (i < m_size)
 139     {
 140       const size_type left_child_i = left_child(i);
 141       const size_type right_child_i = right_child(i);
 142       _GLIBCXX_DEBUG_ASSERT(right_child_i > left_child_i);
 143       const bool smaller_than_left_child = left_child_i < m_size &&
 144         entry_cmp::operator()(m_a_entries[i], m_a_entries[left_child_i]);
 145
 146       const bool smaller_than_right_child = right_child_i < m_size &&
 147         entry_cmp::operator()(m_a_entries[i], m_a_entries[right_child_i]);
 148
 149       const bool swap_with_r_child = smaller_than_right_child && (!smaller_than_left_child || entry_cmp::operator()(m_a_entries[left_child_i], m_a_entries[right_child_i]));
 150
 151       const bool swap_with_l_child = !swap_with_r_child && smaller_than_left_child;
 152
 153       if (swap_with_l_child)
 154         {
 155           std::swap(m_a_entries[i], m_a_entries[left_child_i]);
 156           i = left_child_i;
 157         }
 158       else if (swap_with_r_child)
 159         {
 160           std::swap(m_a_entries[i], m_a_entries[right_child_i]);
 161           i = right_child_i;
 162         }
 163       else
 164         i = m_size;
 165     }
 166 }
 167
 168 PB_DS_CLASS_T_DEC
 169 inline void
 170 PB_DS_CLASS_C_DEC::
 171 swap_value_imp(entry_pointer p_e, value_type new_val, true_type)
 172 {
 173   * p_e = new_val;
 174 }
 175
 176 PB_DS_CLASS_T_DEC
 177 inline void
 178 PB_DS_CLASS_C_DEC::
 179 swap_value_imp(entry_pointer p_e, const_reference r_new_val, false_type)
 180 {
 181   value_type tmp(r_new_val);
 182   (*p_e)->swap(tmp);
 183 }