]> rtime.felk.cvut.cz Git - l4.git/blob - l4/pkg/libstdc++-v3/contrib/libstdc++-v3-4.6/include/ext/pb_ds/detail/ov_tree_map_/split_join_fn_imps.hpp
update
[l4.git] / l4 / pkg / libstdc++-v3 / contrib / libstdc++-v3-4.6 / include / ext / pb_ds / detail / ov_tree_map_ / split_join_fn_imps.hpp
1 // -*- C++ -*-
2
3 // Copyright (C) 2005, 2006, 2009 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 split_join_fn_imps.hpp
38  * Contains an implementation class for ov_tree_.
39  */
40
41 PB_DS_CLASS_T_DEC
42 void
43 PB_DS_CLASS_C_DEC::
44 split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other)
45 {
46   _GLIBCXX_DEBUG_ONLY(assert_valid();)
47   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
48
49   if (m_size == 0)
50     {
51       other.clear();
52       _GLIBCXX_DEBUG_ONLY(assert_valid();)
53       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
54       return;
55     }
56
57   if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin())))
58     {
59       value_swap(other);
60       _GLIBCXX_DEBUG_ONLY(assert_valid();)
61       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
62       return;
63     }
64
65   if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1))))
66     {
67       _GLIBCXX_DEBUG_ONLY(assert_valid();)
68       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
69       return;
70     }
71
72   if (m_size == 1)
73     {
74       value_swap(other);
75       _GLIBCXX_DEBUG_ONLY(assert_valid();)
76       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
77       return;
78     }
79
80   _GLIBCXX_DEBUG_ONLY(debug_base::join(other);)
81   iterator it = upper_bound(r_key);
82   PB_DS_CLASS_C_DEC new_other(other, other);
83   new_other.copy_from_ordered_range(it, end());
84   PB_DS_CLASS_C_DEC new_this(*this, * this);
85   new_this.copy_from_ordered_range(begin(), it);
86
87   // No exceptions from this point.
88   _GLIBCXX_DEBUG_ONLY(debug_base::split(r_key,(Cmp_Fn& )(*this), other);)
89   other.update(other.node_begin(), (node_update* )(&other));
90   update(node_begin(), (node_update* )this);
91   other.value_swap(new_other);
92   value_swap(new_this);
93   _GLIBCXX_DEBUG_ONLY(assert_valid();)
94   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
95 }
96
97 PB_DS_CLASS_T_DEC
98 void
99 PB_DS_CLASS_C_DEC::
100 join(PB_DS_CLASS_C_DEC& other)
101 {
102   _GLIBCXX_DEBUG_ONLY(assert_valid();)
103   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
104   if (other.m_size == 0)
105     return;
106
107   if (m_size == 0)
108     {
109       value_swap(other);
110       return;
111     }
112
113   const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)),
114                                           PB_DS_V2F(*other.begin()));
115
116   const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)),
117                                          PB_DS_V2F(*begin()));
118
119   if (!greater && !lesser)
120     __throw_join_error();
121
122   PB_DS_CLASS_C_DEC new_this(*this, *this);
123
124   if (greater)
125     new_this.copy_from_ordered_range(begin(), end(), 
126                                      other.begin(), other.end());
127   else
128     new_this.copy_from_ordered_range(other.begin(), other.end(),
129                                      begin(), end());
130
131   // No exceptions from this point.
132   _GLIBCXX_DEBUG_ONLY(debug_base::join(other);)
133   value_swap(new_this);
134   other.clear();
135   _GLIBCXX_DEBUG_ONLY(assert_valid();)
136   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
137 }