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1 | /* |
2 | * Copyright Andrey Semashev 2007 - 2015. | |
3 | * Distributed under the Boost Software License, Version 1.0. | |
4 | * (See accompanying file LICENSE_1_0.txt or copy at | |
5 | * http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | /*! | |
8 | * \file formatters/csv_decorator.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 18.11.2012 | |
11 | * | |
12 | * The header contains implementation of a CSV-style character decorator. | |
13 | * See: http://en.wikipedia.org/wiki/Comma-separated_values | |
14 | */ | |
15 | ||
16 | #ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_ | |
17 | #define BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_ | |
18 | ||
19 | #include <boost/range/iterator_range_core.hpp> | |
20 | #include <boost/log/detail/config.hpp> | |
21 | #include <boost/log/expressions/formatters/char_decorator.hpp> | |
22 | #include <boost/log/detail/header.hpp> | |
23 | ||
24 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
25 | #pragma once | |
26 | #endif | |
27 | ||
28 | namespace boost { | |
29 | ||
30 | BOOST_LOG_OPEN_NAMESPACE | |
31 | ||
32 | namespace expressions { | |
33 | ||
34 | namespace aux { | |
35 | ||
36 | template< typename > | |
37 | struct csv_decorator_traits; | |
38 | ||
39 | #ifdef BOOST_LOG_USE_CHAR | |
40 | template< > | |
41 | struct csv_decorator_traits< char > | |
42 | { | |
43 | static boost::iterator_range< const char* const* > get_patterns() | |
44 | { | |
45 | static const char* const patterns[] = | |
46 | { | |
47 | "\"" | |
48 | }; | |
49 | return boost::make_iterator_range(patterns); | |
50 | } | |
51 | static boost::iterator_range< const char* const* > get_replacements() | |
52 | { | |
53 | static const char* const replacements[] = | |
54 | { | |
55 | "\"\"" | |
56 | }; | |
57 | return boost::make_iterator_range(replacements); | |
58 | } | |
59 | }; | |
60 | #endif // BOOST_LOG_USE_CHAR | |
61 | ||
62 | #ifdef BOOST_LOG_USE_WCHAR_T | |
63 | template< > | |
64 | struct csv_decorator_traits< wchar_t > | |
65 | { | |
66 | static boost::iterator_range< const wchar_t* const* > get_patterns() | |
67 | { | |
68 | static const wchar_t* const patterns[] = | |
69 | { | |
70 | L"\"" | |
71 | }; | |
72 | return boost::make_iterator_range(patterns); | |
73 | } | |
74 | static boost::iterator_range< const wchar_t* const* > get_replacements() | |
75 | { | |
76 | static const wchar_t* const replacements[] = | |
77 | { | |
78 | L"\"\"" | |
79 | }; | |
80 | return boost::make_iterator_range(replacements); | |
81 | } | |
82 | }; | |
83 | #endif // BOOST_LOG_USE_WCHAR_T | |
84 | ||
85 | template< typename CharT > | |
86 | struct csv_decorator_gen | |
87 | { | |
88 | typedef CharT char_type; | |
89 | ||
90 | template< typename SubactorT > | |
91 | BOOST_FORCEINLINE char_decorator_actor< SubactorT, pattern_replacer< char_type > > operator[] (SubactorT const& subactor) const | |
92 | { | |
93 | typedef csv_decorator_traits< char_type > traits_type; | |
94 | typedef pattern_replacer< char_type > replacer_type; | |
95 | typedef char_decorator_actor< SubactorT, replacer_type > result_type; | |
96 | typedef typename result_type::terminal_type terminal_type; | |
97 | typename result_type::base_type act = {{ terminal_type(subactor, replacer_type(traits_type::get_patterns(), traits_type::get_replacements())) }}; | |
98 | return result_type(act); | |
99 | } | |
100 | }; | |
101 | ||
102 | } // namespace aux | |
103 | ||
104 | /*! | |
105 | * CSV-style decorator generator object. The decorator doubles double quotes that may be found | |
106 | * in the output. See http://en.wikipedia.org/wiki/Comma-separated_values for more information on | |
107 | * the CSV format. The generator provides <tt>operator[]</tt> that can be used to construct | |
108 | * the actual decorator. For example: | |
109 | * | |
110 | * <code> | |
111 | * csv_decor[ stream << attr< std::string >("MyAttr") ] | |
112 | * </code> | |
113 | * | |
114 | * For wide-character formatting there is the similar \c wcsv_decor decorator generator object. | |
115 | */ | |
116 | #ifdef BOOST_LOG_USE_CHAR | |
117 | const aux::csv_decorator_gen< char > csv_decor = {}; | |
118 | #endif | |
119 | #ifdef BOOST_LOG_USE_WCHAR_T | |
120 | const aux::csv_decorator_gen< wchar_t > wcsv_decor = {}; | |
121 | #endif | |
122 | ||
123 | /*! | |
124 | * The function creates an CSV-style decorator generator for arbitrary character type. | |
125 | */ | |
126 | template< typename CharT > | |
127 | BOOST_FORCEINLINE aux::csv_decorator_gen< CharT > make_csv_decor() | |
128 | { | |
129 | return aux::csv_decorator_gen< CharT >(); | |
130 | } | |
131 | ||
132 | } // namespace expressions | |
133 | ||
134 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
135 | ||
136 | } // namespace boost | |
137 | ||
138 | #include <boost/log/detail/footer.hpp> | |
139 | ||
140 | #endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_ |