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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 snprintf.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 20.02.2009 | |
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 | #ifndef BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_ | |
17 | #define BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_ | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <cstddef> | |
21 | #include <cstdarg> | |
22 | #include <boost/log/detail/config.hpp> | |
23 | #ifdef BOOST_LOG_USE_WCHAR_T | |
24 | #include <wchar.h> | |
25 | #endif // BOOST_LOG_USE_WCHAR_T | |
26 | #include <boost/log/detail/header.hpp> | |
27 | ||
28 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
29 | #pragma once | |
30 | #endif | |
31 | ||
32 | namespace boost { | |
33 | ||
34 | BOOST_LOG_OPEN_NAMESPACE | |
35 | ||
36 | namespace aux { | |
37 | ||
38 | #if defined(_MSC_VER) || (defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)) | |
39 | ||
40 | // MSVC snprintfs are not conforming but they are good enough for our cases. | |
41 | // MinGW32, at least the older versions up until gcc 4.7, also provide the non-conforming interface. | |
42 | inline int vsnprintf(char* buf, std::size_t size, const char* format, std::va_list args) | |
43 | { | |
44 | int n = _vsnprintf(buf, size, format, args); | |
45 | if (static_cast< unsigned int >(n) >= size) | |
46 | { | |
47 | n = static_cast< int >(size); | |
48 | buf[size - 1] = '\0'; | |
49 | } | |
50 | return n; | |
51 | } | |
52 | ||
53 | # ifdef BOOST_LOG_USE_WCHAR_T | |
54 | inline int vswprintf(wchar_t* buf, std::size_t size, const wchar_t* format, std::va_list args) | |
55 | { | |
56 | int n = _vsnwprintf(buf, size, format, args); | |
57 | if (static_cast< unsigned int >(n) >= size) | |
58 | { | |
59 | n = static_cast< int >(size); | |
60 | buf[size - 1] = L'\0'; | |
61 | } | |
62 | return n; | |
63 | } | |
64 | # endif // BOOST_LOG_USE_WCHAR_T | |
65 | ||
66 | inline int snprintf(char* buf, std::size_t size, const char* format, ...) | |
67 | { | |
68 | std::va_list args; | |
69 | va_start(args, format); | |
70 | int n = vsnprintf(buf, size, format, args); | |
71 | va_end(args); | |
72 | return n; | |
73 | } | |
74 | ||
75 | # ifdef BOOST_LOG_USE_WCHAR_T | |
76 | inline int swprintf(wchar_t* buf, std::size_t size, const wchar_t* format, ...) | |
77 | { | |
78 | std::va_list args; | |
79 | va_start(args, format); | |
80 | int n = vswprintf(buf, size, format, args); | |
81 | va_end(args); | |
82 | return n; | |
83 | } | |
84 | # endif // BOOST_LOG_USE_WCHAR_T | |
85 | ||
86 | #else | |
87 | ||
88 | // Standard-conforming compilers already have the correct snprintfs | |
89 | using ::snprintf; | |
90 | using ::vsnprintf; | |
91 | ||
92 | # ifdef BOOST_LOG_USE_WCHAR_T | |
93 | using ::swprintf; | |
94 | using ::vswprintf; | |
95 | # endif // BOOST_LOG_USE_WCHAR_T | |
96 | ||
97 | #endif | |
98 | ||
99 | } // namespace aux | |
100 | ||
101 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
102 | ||
103 | } // namespace boost | |
104 | ||
105 | #include <boost/log/detail/footer.hpp> | |
106 | ||
107 | #endif // BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_ |