libstdc++

splay_tree_/insert_fn_imps.hpp
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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
41 PB_DS_CLASS_T_DEC
42 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
43 PB_DS_CLASS_C_DEC::
44 insert(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
55 PB_DS_CLASS_T_DEC
56 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
57 PB_DS_CLASS_C_DEC::
58 insert_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 }