1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// -*- C++ -*-
// Copyright (C) 2005, 2006, 2009, 2011 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file trie_policy/prefix_search_node_update_imp.hpp
* Contains an implementation of prefix_search_node_update.
*/
PB_DS_CLASS_T_DEC
std::pair<
typename PB_DS_CLASS_C_DEC::const_iterator,
typename PB_DS_CLASS_C_DEC::const_iterator>
PB_DS_CLASS_C_DEC::
prefix_range(key_const_reference r_key) const
{
const access_traits& r_traits = get_access_traits();
return (prefix_range(r_traits.begin(r_key), r_traits.end(r_key)));
}
PB_DS_CLASS_T_DEC
std::pair<
typename PB_DS_CLASS_C_DEC::iterator,
typename PB_DS_CLASS_C_DEC::iterator>
PB_DS_CLASS_C_DEC::
prefix_range(key_const_reference r_key)
{
return (prefix_range(get_access_traits().begin(r_key),
get_access_traits().end(r_key)));
}
PB_DS_CLASS_T_DEC
std::pair<
typename PB_DS_CLASS_C_DEC::const_iterator,
typename PB_DS_CLASS_C_DEC::const_iterator>
PB_DS_CLASS_C_DEC::
prefix_range(typename access_traits::const_iterator b,
typename access_traits::const_iterator e) const
{
const std::pair<iterator, iterator> non_const_ret =
const_cast<PB_DS_CLASS_C_DEC* >(this)->prefix_range(b, e);
return (std::make_pair(const_iterator(non_const_ret.first),
const_iterator(non_const_ret.second)));
}
PB_DS_CLASS_T_DEC
std::pair<
typename PB_DS_CLASS_C_DEC::iterator,
typename PB_DS_CLASS_C_DEC::iterator>
PB_DS_CLASS_C_DEC::
prefix_range(typename access_traits::const_iterator b,
typename access_traits::const_iterator e)
{
Node_Itr nd_it = node_begin();
Node_Itr end_nd_it = node_end();
const access_traits& r_traits = get_access_traits();
const size_type given_range_length = std::distance(b, e);
while (true)
{
if (nd_it == end_nd_it)
return (std::make_pair(end(), end()));
const size_type common_range_length =
base_type::common_prefix_len(nd_it, b, e, r_traits);
if (common_range_length >= given_range_length)
{
iterator ret_b = this->leftmost_it(nd_it);
iterator ret_e = this->rightmost_it(nd_it);
return (std::make_pair(ret_b, ++ret_e));
}
nd_it = next_child(nd_it, b, e, end_nd_it, r_traits);
}
}
PB_DS_CLASS_T_DEC
typename PB_DS_CLASS_C_DEC::node_iterator
PB_DS_CLASS_C_DEC::
next_child(node_iterator nd_it, typename access_traits::const_iterator b,
typename access_traits::const_iterator e, node_iterator end_nd_it,
const access_traits& r_traits)
{
const size_type num_children = nd_it.num_children();
node_iterator ret = end_nd_it;
size_type max_length = 0;
for (size_type i = 0; i < num_children; ++i)
{
node_iterator pot = nd_it.get_child(i);
const size_type common_range_length =
base_type::common_prefix_len(pot, b, e, r_traits);
if (common_range_length > max_length)
{
ret = pot;
max_length = common_range_length;
}
}
return (ret);
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
operator()(node_iterator /*nd_it*/, node_const_iterator /*end_nd_it*/) const
{ }
|
