change version to 0.7.3
[ncmpcpp.git] / src / regex_filter.h
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1 /***************************************************************************
2 * Copyright (C) 2008-2014 by Andrzej Rybczak *
3 * electricityispower@gmail.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/
21 #ifndef NCMPCPP_REGEX_FILTER_H
22 #define NCMPCPP_REGEX_FILTER_H
24 #include "config.h"
26 #ifdef BOOST_REGEX_ICU
27 # include <boost/regex/icu.hpp>
28 #else
29 # include <boost/regex.hpp>
30 #endif // BOOST_REGEX_ICU
32 #include <cassert>
33 #include <iostream>
35 namespace Regex {
37 typedef
38 #ifdef BOOST_REGEX_ICU
39 boost::u32regex
40 #else
41 boost::regex
42 #endif // BOOST_REGEX_ICU
43 Regex;
45 template <typename StringT>
46 inline Regex make(StringT &&s, boost::regex_constants::syntax_option_type flags)
48 return
49 # ifdef BOOST_REGEX_ICU
50 boost::make_u32regex
51 # else
52 boost::regex
53 # endif // BOOST_REGEX_ICU
54 (std::forward<StringT>(s), flags);
57 template <typename StringT>
58 inline bool search(StringT &&s, const Regex &rx)
60 try {
61 return
62 # ifdef BOOST_REGEX_ICU
63 boost::u32regex_search
64 # else
65 boost::regex_search
66 # endif // BOOST_REGEX_ICU
67 (std::forward<StringT>(s), rx);
68 } catch (std::out_of_range &e) {
69 // Invalid UTF-8 sequence, ignore the string.
70 std::cerr << "Regex::search: error while processing \"" << s << "\": " << e.what() << "\n";
71 return false;
75 template <typename T>
76 struct Filter
78 typedef NC::Menu<T> MenuT;
79 typedef typename NC::Menu<T>::Item Item;
80 typedef std::function<bool(const Regex &, const T &)> FilterFunction;
82 Filter() { }
83 Filter(Regex rx, FilterFunction filter)
84 : m_rx(std::move(rx)), m_filter(std::move(filter)) { }
86 void clear()
88 m_filter = nullptr;
91 bool operator()(const Item &item) const {
92 assert(defined());
93 return m_filter(m_rx, item.value());
96 bool defined() const
98 return m_filter.operator bool();
101 private:
102 Regex m_rx;
103 FilterFunction m_filter;
106 template <typename T> struct ItemFilter
108 typedef NC::Menu<T> MenuT;
109 typedef typename NC::Menu<T>::Item Item;
110 typedef std::function<bool(const Regex &, const Item &)> FilterFunction;
112 ItemFilter() { }
113 ItemFilter(Regex rx, FilterFunction filter)
114 : m_rx(std::move(rx)), m_filter(std::move(filter)) { }
116 void clear()
118 m_filter = nullptr;
121 bool operator()(const Item &item) {
122 return m_filter(m_rx, item);
125 bool defined() const
127 return m_filter.operator bool();
130 private:
131 Regex m_rx;
132 FilterFunction m_filter;
137 #endif // NCMPCPP_REGEX_FILTER_H