mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/bin_search_tree_/erase_fn_imps.hpp

   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 erase_fn_imps.hpp
  44  * Contains an implementation class for bin_search_tree_.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 inline void
  49 PB_DS_CLASS_C_DEC::
  50 actual_erase_node(node_pointer p_z)
  51 {
  52   _GLIBCXX_DEBUG_ASSERT(m_size > 0);
  53   --m_size;
  54
  55   _GLIBCXX_DEBUG_ONLY(erase_existing(PB_DS_V2F(p_z->m_value)));
  56
  57   p_z->~node();
  58
  59   s_node_allocator.deallocate(p_z, 1);
  60 }
  61
  62 PB_DS_CLASS_T_DEC
  63 inline void
  64 PB_DS_CLASS_C_DEC::
  65 update_min_max_for_erased_node(node_pointer p_z)
  66 {
  67   if (m_size == 1)
  68     {
  69       m_p_head->m_p_left = m_p_head->m_p_right = m_p_head;
  70
  71       return;
  72     }
  73
  74   if (m_p_head->m_p_left == p_z)
  75     {
  76       iterator it(p_z);
  77
  78       ++it;
  79
  80       m_p_head->m_p_left = it.m_p_nd;
  81     }
  82   else if (m_p_head->m_p_right == p_z)
  83     {
  84       iterator it(p_z);
  85
  86       --it;
  87
  88       m_p_head->m_p_right = it.m_p_nd;
  89     }
  90 }
  91
  92 PB_DS_CLASS_T_DEC
  93 void
  94 PB_DS_CLASS_C_DEC::
  95 clear()
  96 {
  97   _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)
  98
  99     clear_imp(m_p_head->m_p_parent);
 100
 101   m_size = 0;
 102
 103   initialize();
 104
 105   _GLIBCXX_DEBUG_ONLY(debug_base::clear();)
 106
 107     _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)
 108     }
 109
 110 PB_DS_CLASS_T_DEC
 111 void
 112 PB_DS_CLASS_C_DEC::
 113 clear_imp(node_pointer p_nd)
 114 {
 115   if (p_nd == NULL)
 116     return;
 117
 118   clear_imp(p_nd->m_p_left);
 119
 120   clear_imp(p_nd->m_p_right);
 121
 122   p_nd->~node();
 123
 124   s_node_allocator.deallocate(p_nd, 1);
 125 }
 126