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 trivial.cpp
9 * \author Andrey Semashev
10 * \date 07.11.2009
11 *
12 * \brief This header is the Boost.Log library implementation, see the library documentation
13 * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
14 */
15
16#include <boost/log/detail/config.hpp>
17
18#if defined(BOOST_LOG_USE_CHAR)
19
20#include <string>
21#include <istream>
22#include <boost/log/trivial.hpp>
23#include <boost/log/sources/global_logger_storage.hpp>
24#include <boost/log/detail/header.hpp>
25
26namespace boost {
27
28BOOST_LOG_OPEN_NAMESPACE
29
30namespace trivial {
31
32//! Initialization routine
33BOOST_LOG_API logger::logger_type logger::construct_logger()
34{
35 return logger_type(keywords::severity = info);
36}
37
38//! Returns a reference to the trivial logger instance
39BOOST_LOG_API logger::logger_type& logger::get()
40{
41 return log::sources::aux::logger_singleton< logger >::get();
42}
43
44BOOST_LOG_ANONYMOUS_NAMESPACE {
45
46BOOST_CONSTEXPR_OR_CONST unsigned int names_count = 6;
47
48template< typename CharT >
49struct severity_level_names
50{
51 static const CharT names[names_count][8];
52};
53
54template< typename CharT >
55const CharT severity_level_names< CharT >::names[names_count][8] =
56{
57 { 't', 'r', 'a', 'c', 'e', 0 },
58 { 'd', 'e', 'b', 'u', 'g', 0 },
59 { 'i', 'n', 'f', 'o', 0 },
60 { 'w', 'a', 'r', 'n', 'i', 'n', 'g', 0 },
61 { 'e', 'r', 'r', 'o', 'r', 0 },
62 { 'f', 'a', 't', 'a', 'l', 0 }
63};
64
65} // namespace
66
67template< typename CharT >
68BOOST_LOG_API const CharT* to_string(severity_level lvl)
69{
70 typedef severity_level_names< CharT > level_names;
71 if (BOOST_LIKELY(static_cast< unsigned int >(lvl) < names_count))
72 return level_names::names[static_cast< unsigned int >(lvl)];
73 return NULL;
74}
75
76//! Parses enumeration value from string and returns \c true on success and \c false otherwise
77template< typename CharT >
78BOOST_LOG_API bool from_string(const CharT* str, std::size_t len, severity_level& lvl)
79{
80 typedef severity_level_names< CharT > level_names;
81 typedef std::char_traits< CharT > char_traits;
82
83 if (len == 5u)
84 {
85 if (char_traits::compare(str, level_names::names[0], len) == 0)
86 lvl = static_cast< severity_level >(0);
87 else if (char_traits::compare(str, level_names::names[1], len) == 0)
88 lvl = static_cast< severity_level >(1);
89 else if (char_traits::compare(str, level_names::names[4], len) == 0)
90 lvl = static_cast< severity_level >(4);
91 else if (char_traits::compare(str, level_names::names[5], len) == 0)
92 lvl = static_cast< severity_level >(5);
93 else
94 goto no_match;
95 return true;
96 }
97 else if (len == 4u)
98 {
99 if (char_traits::compare(str, level_names::names[2], len) == 0)
100 lvl = static_cast< severity_level >(2);
101 else
102 goto no_match;
103 return true;
104 }
105 else if (len == 7u)
106 {
107 if (char_traits::compare(str, level_names::names[3], len) == 0)
108 lvl = static_cast< severity_level >(3);
109 else
110 goto no_match;
111 return true;
112 }
113
114no_match:
115 return false;
116}
117
118template< typename CharT, typename TraitsT >
119BOOST_LOG_API std::basic_istream< CharT, TraitsT >& operator>> (
120 std::basic_istream< CharT, TraitsT >& strm, severity_level& lvl)
121{
122 if (BOOST_LIKELY(strm.good()))
123 {
124 typedef std::basic_string< CharT, TraitsT > string_type;
125 string_type str;
126 strm >> str;
127 if (BOOST_UNLIKELY(!boost::log::trivial::from_string(str.data(), str.size(), lvl)))
128 strm.setstate(std::ios_base::failbit);
129 }
130
131 return strm;
132}
133
134template BOOST_LOG_API const char* to_string< char >(severity_level lvl);
135template BOOST_LOG_API bool from_string< char >(const char* begin, std::size_t len, severity_level& lvl);
136template BOOST_LOG_API std::basic_istream< char, std::char_traits< char > >&
137 operator>> < char, std::char_traits< char > > (
138 std::basic_istream< char, std::char_traits< char > >& strm, severity_level& lvl);
139#ifdef BOOST_LOG_USE_WCHAR_T
140template BOOST_LOG_API const wchar_t* to_string< wchar_t >(severity_level lvl);
141template BOOST_LOG_API bool from_string< wchar_t >(const wchar_t* begin, std::size_t len, severity_level& lvl);
142template BOOST_LOG_API std::basic_istream< wchar_t, std::char_traits< wchar_t > >&
143 operator>> < wchar_t, std::char_traits< wchar_t > > (
144 std::basic_istream< wchar_t, std::char_traits< wchar_t > >& strm, severity_level& lvl);
145#endif
146
147} // namespace trivial
148
149BOOST_LOG_CLOSE_NAMESPACE // namespace log
150
151} // namespace boost
152
153#include <boost/log/detail/footer.hpp>
154
155#endif // defined(BOOST_LOG_USE_CHAR)
156

source code of boost/libs/log/src/trivial.cpp