1// -*- C++ -*-
2
3// Copyright (C) 2005-2014 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 ov_tree_map_/split_join_fn_imps.hpp
38 * Contains an implementation class for ov_tree_.
39 */
40
41PB_DS_CLASS_T_DEC
42void
43PB_DS_CLASS_C_DEC::
44split(key_const_reference r_key, PB_DS_CLASS_C_DEC& other)
45{
46  PB_DS_ASSERT_VALID((*this))
47  PB_DS_ASSERT_VALID(other)
48
49  if (m_size == 0)
50    {
51      other.clear();
52      return;
53    }
54
55  if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin())))
56    {
57      value_swap(other);
58      PB_DS_ASSERT_VALID((*this))
59      PB_DS_ASSERT_VALID(other)
60      return;
61    }
62
63  if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1))))
64    {
65      return;
66    }
67
68  if (m_size == 1)
69    {
70      value_swap(other);
71      PB_DS_ASSERT_VALID((*this))
72      PB_DS_ASSERT_VALID(other)
73      return;
74    }
75
76  iterator it = upper_bound(r_key);
77  PB_DS_CLASS_C_DEC new_other(other, other);
78  new_other.copy_from_ordered_range(it, end());
79  PB_DS_CLASS_C_DEC new_this(*this, *this);
80  new_this.copy_from_ordered_range(begin(), it);
81
82  // No exceptions from this point.
83  other.update(other.node_begin(), (node_update*)(&other));
84  update(node_begin(), (node_update*)this);
85  other.value_swap(new_other);
86  value_swap(new_this);
87  PB_DS_ASSERT_VALID((*this))
88  PB_DS_ASSERT_VALID(other)
89}
90
91PB_DS_CLASS_T_DEC
92void
93PB_DS_CLASS_C_DEC::
94join(PB_DS_CLASS_C_DEC& other)
95{
96  PB_DS_ASSERT_VALID((*this))
97  PB_DS_ASSERT_VALID(other)
98  if (other.m_size == 0)
99    return;
100
101  if (m_size == 0)
102    {
103      value_swap(other);
104      PB_DS_ASSERT_VALID((*this))
105      PB_DS_ASSERT_VALID(other)
106      return;
107    }
108
109  const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)),
110					  PB_DS_V2F(*other.begin()));
111
112  const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)),
113					 PB_DS_V2F(*begin()));
114
115  if (!greater && !lesser)
116    __throw_join_error();
117
118  PB_DS_CLASS_C_DEC new_this(*this, *this);
119
120  if (greater)
121    new_this.copy_from_ordered_range(begin(), end(),
122				     other.begin(), other.end());
123  else
124    new_this.copy_from_ordered_range(other.begin(), other.end(),
125				     begin(), end());
126
127  // No exceptions from this point.
128  value_swap(new_this);
129  other.clear();
130  PB_DS_ASSERT_VALID((*this))
131  PB_DS_ASSERT_VALID(other)
132}
133