| #ifndef BOOST_SYSTEM_DETAIL_GENERIC_CATEGORY_MESSAGE_HPP_INCLUDED |
| #define BOOST_SYSTEM_DETAIL_GENERIC_CATEGORY_MESSAGE_HPP_INCLUDED |
| |
| // Implementation of generic_error_category_message |
| // |
| // Copyright 2018 Peter Dimov |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See library home page at http://www.boost.org/libs/system |
| |
| #include <boost/config.hpp> |
| #include <string> |
| #include <cstring> |
| |
| namespace boost |
| { |
| |
| namespace system |
| { |
| |
| namespace detail |
| { |
| |
| #if defined(__GLIBC__) |
| |
| // glibc has two incompatible strerror_r definitions |
| |
| inline char const * strerror_r_helper( char const * r, char const * ) BOOST_NOEXCEPT |
| { |
| return r; |
| } |
| |
| inline char const * strerror_r_helper( int r, char const * buffer ) BOOST_NOEXCEPT |
| { |
| return r == 0? buffer: "Unknown error"; |
| } |
| |
| inline char const * generic_error_category_message( int ev, char * buffer, std::size_t len ) BOOST_NOEXCEPT |
| { |
| return strerror_r_helper( strerror_r( ev, buffer, len ), buffer ); |
| } |
| |
| inline std::string generic_error_category_message( int ev ) |
| { |
| char buffer[ 128 ]; |
| return generic_error_category_message( ev, buffer, sizeof( buffer ) ); |
| } |
| |
| #else // #if defined(__GLIBC__) |
| |
| // std::strerror is thread-safe on everything else, incl. Windows |
| |
| # if defined( BOOST_MSVC ) |
| # pragma warning( push ) |
| # pragma warning( disable: 4996 ) |
| # elif defined(__clang__) && defined(__has_warning) |
| # pragma clang diagnostic push |
| # if __has_warning("-Wdeprecated-declarations") |
| # pragma clang diagnostic ignored "-Wdeprecated-declarations" |
| # endif |
| # endif |
| |
| inline std::string generic_error_category_message( int ev ) |
| { |
| char const * m = std::strerror( ev ); |
| return m? m: "Unknown error"; |
| } |
| |
| inline char const * generic_error_category_message( int ev, char * buffer, std::size_t len ) BOOST_NOEXCEPT |
| { |
| if( len == 0 ) |
| { |
| return buffer; |
| } |
| |
| if( len == 1 ) |
| { |
| buffer[0] = 0; |
| return buffer; |
| } |
| |
| char const * m = std::strerror( ev ); |
| |
| if( m == 0 ) return "Unknown error"; |
| |
| std::strncpy( buffer, m, len - 1 ); |
| buffer[ len-1 ] = 0; |
| |
| return buffer; |
| } |
| |
| # if defined( BOOST_MSVC ) |
| # pragma warning( pop ) |
| # elif defined(__clang__) && defined(__has_warning) |
| # pragma clang diagnostic pop |
| # endif |
| |
| #endif // #if defined(__GLIBC__) |
| |
| } // namespace detail |
| |
| } // namespace system |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_SYSTEM_DETAIL_GENERIC_CATEGORY_MESSAGE_HPP_INCLUDED |