108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
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/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file snprintf.hpp
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* \author Andrey Semashev
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* \date 20.02.2009
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*
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* \brief This header is the Boost.Log library implementation, see the library documentation
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* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
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*/
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#ifndef BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_
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#include <stdio.h>
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#include <cstddef>
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#include <cstdarg>
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#include <boost/log/detail/config.hpp>
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#ifdef BOOST_LOG_USE_WCHAR_T
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#include <wchar.h>
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#endif // BOOST_LOG_USE_WCHAR_T
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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#if defined(_MSC_VER) || (defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR))
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// MSVC snprintfs are not conforming but they are good enough for our cases.
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// MinGW32, at least the older versions up until gcc 4.7, also provide the non-conforming interface.
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inline int vsnprintf(char* buf, std::size_t size, const char* format, std::va_list args)
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{
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int n = _vsnprintf(buf, size, format, args);
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if (static_cast< unsigned int >(n) >= size)
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{
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n = static_cast< int >(size);
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buf[size - 1] = '\0';
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}
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return n;
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}
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# ifdef BOOST_LOG_USE_WCHAR_T
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inline int vswprintf(wchar_t* buf, std::size_t size, const wchar_t* format, std::va_list args)
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{
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int n = _vsnwprintf(buf, size, format, args);
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if (static_cast< unsigned int >(n) >= size)
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{
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n = static_cast< int >(size);
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buf[size - 1] = L'\0';
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}
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return n;
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}
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# endif // BOOST_LOG_USE_WCHAR_T
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inline int snprintf(char* buf, std::size_t size, const char* format, ...)
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{
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std::va_list args;
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va_start(args, format);
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int n = vsnprintf(buf, size, format, args);
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va_end(args);
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return n;
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}
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# ifdef BOOST_LOG_USE_WCHAR_T
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inline int swprintf(wchar_t* buf, std::size_t size, const wchar_t* format, ...)
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{
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std::va_list args;
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va_start(args, format);
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int n = vswprintf(buf, size, format, args);
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va_end(args);
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return n;
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}
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# endif // BOOST_LOG_USE_WCHAR_T
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#else
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// Standard-conforming compilers already have the correct snprintfs
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using ::snprintf;
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using ::vsnprintf;
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# ifdef BOOST_LOG_USE_WCHAR_T
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using ::swprintf;
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using ::vswprintf;
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# endif // BOOST_LOG_USE_WCHAR_T
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#endif
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_DETAIL_SNPRINTF_HPP_INCLUDED_
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