1// -*- C++ -*-
2
3// Copyright (C) 2005-2013 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 splay_tree_/insert_fn_imps.hpp
38 * Contains an implementation class for splay_tree_.
39 */
40
41PB_DS_CLASS_T_DEC
42inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
43PB_DS_CLASS_C_DEC::
44insert(const_reference r_value)
45{
46  PB_DS_ASSERT_VALID((*this))
47  std::pair<point_iterator, bool> ins_pair = insert_leaf_imp(r_value);
48  ins_pair.first.m_p_nd->m_special = false;
49  PB_DS_ASSERT_VALID((*this))
50  splay(ins_pair.first.m_p_nd);
51  PB_DS_ASSERT_VALID((*this))
52  return ins_pair;
53}
54
55PB_DS_CLASS_T_DEC
56inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
57PB_DS_CLASS_C_DEC::
58insert_leaf_imp(const_reference r_value)
59{
60  _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid(__FILE__,
61							     __LINE__);)
62  if (base_type::m_size == 0)
63    return std::make_pair(base_type::insert_imp_empty(r_value), true);
64
65  node_pointer p_nd = base_type::m_p_head->m_p_parent;
66  node_pointer p_pot = base_type::m_p_head;
67
68  while (p_nd != 0)
69    if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), PB_DS_V2F(r_value)))
70      {
71	if (!Cmp_Fn::operator()(PB_DS_V2F(r_value), PB_DS_V2F(p_nd->m_value)))
72	  {
73	    return std::make_pair(point_iterator(p_nd), false);
74	  }
75	p_pot = p_nd;
76	p_nd = p_nd->m_p_left;
77      }
78    else
79      p_nd = p_nd->m_p_right;
80
81  if (p_pot == base_type::m_p_head)
82    return std::make_pair(base_type::insert_leaf_new(r_value, base_type::m_p_head->m_p_right, false), true);
83
84  PB_DS_CHECK_KEY_DOES_NOT_EXIST(PB_DS_V2F(r_value))
85
86  p_nd = p_pot->m_p_left;
87  if (p_nd == 0)
88    return (std::make_pair(base_type::insert_leaf_new(r_value, p_pot, true), true));
89
90  while (p_nd->m_p_right != 0)
91    p_nd = p_nd->m_p_right;
92
93  return std::make_pair(this->insert_leaf_new(r_value, p_nd, false), true);
94}
95