debug.h (_GLIBCXX_DEBUG_ONLY): New.

[thirdparty/gcc.git] / libstdc++-v3 / include / ext / pb_ds / detail / splay_tree_ / insert_fn_imps.hpp

// -*- C++ -*-

// Copyright (C) 2005, 2006 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 2, 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.

// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.

// As a special exception, you may use this file as part of a free
// software library without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License.  This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.

// 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 insert_fn_imps.hpp
 * Contains an implementation class for splay_tree_.
 */

PB_DS_CLASS_T_DEC
inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
PB_DS_CLASS_C_DEC::
insert(const_reference r_value)
{
  _GLIBCXX_DEBUG_ONLY(assert_valid();)

    std::pair<point_iterator, bool> ins_pair =
    insert_leaf_imp(r_value);

  ins_pair.first.m_p_nd->m_special = false;

  _GLIBCXX_DEBUG_ONLY(assert_valid());

  splay(ins_pair.first.m_p_nd);

  _GLIBCXX_DEBUG_ONLY(assert_valid());

  return (ins_pair);
}

PB_DS_CLASS_T_DEC
inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
PB_DS_CLASS_C_DEC::
insert_leaf_imp(const_reference r_value)
{
  _GLIBCXX_DEBUG_ONLY(PB_DS_BASE_C_DEC::structure_only_assert_valid();)

    if (PB_DS_BASE_C_DEC::m_size == 0)
      return (std::make_pair(
			     PB_DS_BASE_C_DEC::insert_imp_empty(r_value),
			     true));

  node_pointer p_nd = PB_DS_BASE_C_DEC::m_p_head->m_p_parent;
  node_pointer p_pot = PB_DS_BASE_C_DEC::m_p_head;

  while (p_nd != NULL)
    if (!Cmp_Fn::operator()(
			    PB_DS_V2F(p_nd->m_value),
			    PB_DS_V2F(r_value)))
      {
	if (!Cmp_Fn::operator()(
				PB_DS_V2F(r_value),
				PB_DS_V2F(p_nd->m_value)))
	  {
	    return std::make_pair(
				  point_iterator(p_nd),
				  false);
	  }

	p_pot = p_nd;

	p_nd = p_nd->m_p_left;
      }
    else
      p_nd = p_nd->m_p_right;

  if (p_pot == PB_DS_BASE_C_DEC::m_p_head)
    return (std::make_pair(
			   PB_DS_BASE_C_DEC::insert_leaf_new(r_value,  PB_DS_BASE_C_DEC::m_p_head->m_p_right, false),
			   true));

  _GLIBCXX_DEBUG_ONLY(PB_DS_BASE_C_DEC::check_key_does_not_exist(
							    PB_DS_V2F(r_value)));

  p_nd = p_pot->m_p_left;
  if (p_nd == NULL)
    return (std::make_pair(
			   PB_DS_BASE_C_DEC::insert_leaf_new(                r_value, p_pot, true),
			   true));

  while (p_nd->m_p_right != NULL)
    p_nd = p_nd->m_p_right;

  return (std::make_pair(
			 insert_leaf_new(r_value, p_nd, false),
			 true));
}