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 insert_fn_imps.hpp
44 * Contains an implementation class for splay_tree_.
45 */
46
47PB_DS_CLASS_T_DEC
48inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
49PB_DS_CLASS_C_DEC::
50insert(const_reference r_value)
51{
52  _GLIBCXX_DEBUG_ONLY(assert_valid();)
53  std::pair<point_iterator, bool> ins_pair = insert_leaf_imp(r_value);
54  ins_pair.first.m_p_nd->m_special = false;
55  _GLIBCXX_DEBUG_ONLY(assert_valid());
56  splay(ins_pair.first.m_p_nd);
57  _GLIBCXX_DEBUG_ONLY(assert_valid());
58  return ins_pair;
59}
60
61PB_DS_CLASS_T_DEC
62inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
63PB_DS_CLASS_C_DEC::
64insert_leaf_imp(const_reference r_value)
65{
66  _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid();)
67  if (base_type::m_size == 0)
68    return std::make_pair(base_type::insert_imp_empty(r_value), true);
69
70  node_pointer p_nd = base_type::m_p_head->m_p_parent;
71  node_pointer p_pot = base_type::m_p_head;
72
73  while (p_nd != NULL)
74    if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), PB_DS_V2F(r_value)))
75      {
76	if (!Cmp_Fn::operator()(PB_DS_V2F(r_value), PB_DS_V2F(p_nd->m_value)))
77	  {
78	    return std::make_pair(point_iterator(p_nd), false);
79	  }
80	p_pot = p_nd;
81	p_nd = p_nd->m_p_left;
82      }
83    else
84      p_nd = p_nd->m_p_right;
85
86  if (p_pot == base_type::m_p_head)
87    return std::make_pair(base_type::insert_leaf_new(r_value, base_type::m_p_head->m_p_right, false), true);
88
89  _GLIBCXX_DEBUG_ONLY(base_type::check_key_does_not_exist(PB_DS_V2F(r_value)));
90
91  p_nd = p_pot->m_p_left;
92  if (p_nd == NULL)
93    return (std::make_pair(base_type::insert_leaf_new(r_value, p_pot, true), true));
94
95  while (p_nd->m_p_right != NULL)
96    p_nd = p_nd->m_p_right;
97
98  return std::make_pair(insert_leaf_new(r_value, p_nd, false), true);
99}
100