bin_search_tree_/erase_fn_imps.hpp
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// -*- C++ -*-
// Copyright (C) 2005-2016 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file bin_search_tree_/erase_fn_imps.hpp
* Contains an implementation class for bin_search_tree_.
*/
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
actual_erase_node(node_pointer p_z)
{
_GLIBCXX_DEBUG_ASSERT(m_size > 0);
--m_size;
_GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(p_z->m_value));)
p_z->~node();
s_node_allocator.deallocate(p_z, 1);
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
update_min_max_for_erased_node(node_pointer p_z)
{
if (m_size == 1)
{
m_p_head->m_p_left = m_p_head->m_p_right = m_p_head;
return;
}
if (m_p_head->m_p_left == p_z)
{
iterator it(p_z);
++it;
m_p_head->m_p_left = it.m_p_nd;
}
else if (m_p_head->m_p_right == p_z)
{
iterator it(p_z);
--it;
m_p_head->m_p_right = it.m_p_nd;
}
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
clear()
{
PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
clear_imp(m_p_head->m_p_parent);
m_size = 0;
initialize();
_GLIBCXX_DEBUG_ONLY(debug_base::clear();)
PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
clear_imp(node_pointer p_nd)
{
if (p_nd == 0)
return;
clear_imp(p_nd->m_p_left);
clear_imp(p_nd->m_p_right);
p_nd->~node();
s_node_allocator.deallocate(p_nd, 1);
}