193 lines
11 KiB
C++
193 lines
11 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 code_conversion.hpp
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* \author Andrey Semashev
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* \date 08.11.2008
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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_CODE_CONVERSION_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_CODE_CONVERSION_HPP_INCLUDED_
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#include <cstddef>
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#include <locale>
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#include <string>
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#include <boost/core/enable_if.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/is_character_type.hpp>
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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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// Implementation note: We have to implement char<->wchar_t conversions even in the absence of the native wchar_t
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// type. These conversions are used in sinks, e.g. to convert multibyte strings to wide-character filesystem paths.
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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#if !defined(BOOST_LOG_NO_CXX11_CODECVT_FACETS)
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#if !defined(BOOST_NO_CXX11_CHAR16_T)
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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#endif
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#if !defined(BOOST_NO_CXX11_CHAR32_T)
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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#endif
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#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_CHAR32_T)
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//! The function converts one string to the character type of another
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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());
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//! The function converts one string to the character type of another
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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());
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#endif
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#endif // !defined(BOOST_LOG_NO_CXX11_CODECVT_FACETS)
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type
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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())
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{
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std::size_t size_left = str2.size() < max_size ? max_size - str2.size() : static_cast< std::size_t >(0u);
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const bool overflow = len > size_left;
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str2.append(reinterpret_cast< const TargetCharT* >(str1), overflow ? size_left : len);
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return !overflow;
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type
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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())
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{
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return aux::code_convert(str1.data(), str1.size(), str2, max_size, loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type
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code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale())
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{
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return aux::code_convert(str1.data(), str1.size(), str2, str2.max_size(), loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) == sizeof(TargetCharT), bool >::type
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code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale())
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{
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return aux::code_convert(str1, len, str2, str2.max_size(), loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type
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code_convert(std::basic_string< SourceCharT, SourceTraitsT, SourceAllocatorT > const& str1, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale())
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{
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return aux::code_convert_impl(str1.c_str(), str1.size(), str2, str2.max_size(), loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type
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code_convert(const SourceCharT* str1, std::size_t len, std::basic_string< TargetCharT, TargetTraitsT, TargetAllocatorT >& str2, std::locale const& loc = std::locale())
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{
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return aux::code_convert_impl(str1, len, str2, str2.max_size(), loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename SourceTraitsT, typename SourceAllocatorT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type
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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())
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{
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return aux::code_convert_impl(str1.c_str(), str1.size(), str2, max_size, loc);
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}
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//! The function converts one string to the character type of another
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template< typename SourceCharT, typename TargetCharT, typename TargetTraitsT, typename TargetAllocatorT >
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inline typename boost::enable_if_c< is_character_type< SourceCharT >::value && is_character_type< TargetCharT >::value && sizeof(SourceCharT) != sizeof(TargetCharT), bool >::type
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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())
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{
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return aux::code_convert_impl(str1, len, str2, max_size, loc);
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}
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//! The function converts the passed string to the narrow-character encoding
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inline std::string const& to_narrow(std::string const& str)
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{
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return str;
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}
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//! The function converts the passed string to the narrow-character encoding
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inline std::string const& to_narrow(std::string const& str, std::locale const&)
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{
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return str;
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}
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//! The function converts the passed string to the narrow-character encoding
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inline std::string to_narrow(std::wstring const& str, std::locale const& loc = std::locale())
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{
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std::string res;
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aux::code_convert_impl(str.c_str(), str.size(), res, res.max_size(), loc);
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_HAS_NRVO)
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return static_cast< std::string&& >(res);
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#else
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return res;
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#endif
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}
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//! The function converts the passed string to the wide-character encoding
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inline std::wstring const& to_wide(std::wstring const& str)
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{
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return str;
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}
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//! The function converts the passed string to the wide-character encoding
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inline std::wstring const& to_wide(std::wstring const& str, std::locale const&)
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{
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return str;
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}
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//! The function converts the passed string to the wide-character encoding
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inline std::wstring to_wide(std::string const& str, std::locale const& loc = std::locale())
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{
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std::wstring res;
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aux::code_convert_impl(str.c_str(), str.size(), res, res.max_size(), loc);
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_HAS_NRVO)
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return static_cast< std::wstring&& >(res);
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#else
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return res;
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#endif
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}
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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_CODE_CONVERSION_HPP_INCLUDED_
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