/* * Copyright Andrey Semashev 2007 - 2015. * 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) */ /*! * \file code_conversion.hpp * \author Andrey Semashev * \date 08.11.2008 * * \brief This header is the Boost.Log library implementation, see the library documentation * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. */ #ifndef BOOST_LOG_DETAIL_CODE_CONVERSION_HPP_INCLUDED_ #define BOOST_LOG_DETAIL_CODE_CONVERSION_HPP_INCLUDED_ #include <cstddef> #include <locale> #include <string> #include <boost/core/enable_if.hpp> #include <boost/log/detail/config.hpp> #include <boost/log/detail/is_character_type.hpp> #include <boost/log/detail/header.hpp> #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif namespace boost { BOOST_LOG_OPEN_NAMESPACE namespace aux { // Implementation note: We have to implement char<->wchar_t conversions even in the absence of the native wchar_t // type. These conversions are used in sinks, e.g. to convert multibyte strings to wide-character filesystem paths. //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const wchar_t* str1, std::size_t len, std::string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char* str1, std::size_t len, std::wstring& str2, std::size_t max_size, std::locale const& loc = std::locale()); #if !defined(BOOST_LOG_NO_CXX11_CODECVT_FACETS) #if !defined(BOOST_NO_CXX11_CHAR16_T) //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char16_t* str1, std::size_t len, std::string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char* str1, std::size_t len, std::u16string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char16_t* str1, std::size_t len, std::wstring& str2, std::size_t max_size, std::locale const& loc = std::locale()); #endif #if !defined(BOOST_NO_CXX11_CHAR32_T) //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char32_t* str1, std::size_t len, std::string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char* str1, std::size_t len, std::u32string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char32_t* str1, std::size_t len, std::wstring& str2, std::size_t max_size, std::locale const& loc = std::locale()); #endif #if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_CHAR32_T) //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char16_t* str1, std::size_t len, std::u32string& str2, std::size_t max_size, std::locale const& loc = std::locale()); //! The function converts one string to the character type of another BOOST_LOG_API bool code_convert_impl(const char32_t* str1, std::size_t len, std::u16string& str2, std::size_t max_size, std::locale const& loc = std::locale()); #endif #endif // !defined(BOOST_LOG_NO_CXX11_CODECVT_FACETS) //! The function converts one string to the character type of another template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::size_t max_size, std::locale const& = std::locale()) { std::size_t size_left = str2.size() < max_size ? max_size - str2.size() : static_cast< std::size_t >(0u); const bool overflow = len > size_left; str2.append(reinterpret_cast< const TargetCharT* >(str1), overflow ? size_left : len); return !overflow; } //! The function converts one string to the character type of another template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::size_t max_size, std::locale const& loc = std::locale()) { return aux::code_convert(str1.data(), str1.size(), str2, max_size, loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale()) { return aux::code_convert(str1.data(), str1.size(), str2, str2.max_size(), loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale()) { return aux::code_convert(str1, len, str2, str2.max_size(), loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale()) { return aux::code_convert_impl(str1.c_str(), str1.size(), str2, str2.max_size(), loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale()) { return aux::code_convert_impl(str1, len, str2, str2.max_size(), loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::size_t max_size, std::locale const& loc = std::locale()) { return aux::code_convert_impl(str1.c_str(), str1.size(), str2, max_size, loc); } //! The function converts one string to the character type of another template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT > inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::size_t max_size, std::locale const& loc = std::locale()) { return aux::code_convert_impl(str1, len, str2, max_size, loc); } //! The function converts the passed string to the narrow-character encoding inline std::string const& to_narrow(std::string const& str) { return str; } //! The function converts the passed string to the narrow-character encoding inline std::string const& to_narrow(std::string const& str, std::locale const&) { return str; } //! The function converts the passed string to the narrow-character encoding inline std::string to_narrow(std::wstring const& str, std::locale const& loc = std::locale()) { std::string res; aux::code_convert_impl(str.c_str(), str.size(), res, res.max_size(), loc); #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_HAS_NRVO) return static_cast< std::string&& >(res); #else return res; #endif } //! The function converts the passed string to the wide-character encoding inline std::wstring const& to_wide(std::wstring const& str) { return str; } //! The function converts the passed string to the wide-character encoding inline std::wstring const& to_wide(std::wstring const& str, std::locale const&) { return str; } //! The function converts the passed string to the wide-character encoding inline std::wstring to_wide(std::string const& str, std::locale const& loc = std::locale()) { std::wstring res; aux::code_convert_impl(str.c_str(), str.size(), res, res.max_size(), loc); #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_HAS_NRVO) return static_cast< std::wstring&& >(res); #else return res; #endif } } // namespace aux BOOST_LOG_CLOSE_NAMESPACE // namespace log } // namespace boost #include <boost/log/detail/footer.hpp> #endif // BOOST_LOG_DETAIL_CODE_CONVERSION_HPP_INCLUDED_