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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 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 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(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()

{

  _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)

    clear_imp(m_p_head->m_p_parent);

  m_size = 0;

  initialize();

  _GLIBCXX_DEBUG_ONLY(debug_base::clear();)

    _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)

    }

PB_DS_CLASS_T_DEC

void

PB_DS_CLASS_C_DEC::

clear_imp(node_pointer p_nd)

{

  if (p_nd == NULL)

    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);

}