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// filesystem windows_file_codecvt.hpp -----------------------------------------------//
// Copyright Beman Dawes 2009
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// Library home page: http://www.boost.org/libs/filesystem
#ifndef BOOST_FILESYSTEM_WINDOWS_FILE_CODECVT_HPP
#define BOOST_FILESYSTEM_WINDOWS_FILE_CODECVT_HPP
#include <boost/filesystem/config.hpp>
#ifdef BOOST_WINDOWS_API
#include <boost/config/workaround.hpp>
#include <cstddef>
#include <cwchar> // std::mbstate_t
#include <locale>
#include <boost/filesystem/detail/header.hpp> // must be the last #include
namespace boost {
namespace filesystem {
namespace detail {
//------------------------------------------------------------------------------------//
// //
// class windows_file_codecvt //
// //
// Warning: partial implementation; even do_in and do_out only partially meet the //
// standard library specifications as the "to" buffer must hold the entire result. //
// //
//------------------------------------------------------------------------------------//
class BOOST_SYMBOL_VISIBLE windows_file_codecvt final :
public std::codecvt< wchar_t, char, std::mbstate_t >
{
public:
explicit windows_file_codecvt(std::size_t refs = 0) :
std::codecvt< wchar_t, char, std::mbstate_t >(refs)
{
}
protected:
bool do_always_noconv() const noexcept override { return false; }
// seems safest to assume variable number of characters since we don't
// actually know what codepage is active
int do_encoding() const noexcept override { return 0; }
std::codecvt_base::result do_in(std::mbstate_t& state, const char* from, const char* from_end, const char*& from_next, wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const override;
std::codecvt_base::result do_out(std::mbstate_t& state, const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next, char* to, char* to_end, char*& to_next) const override;
std::codecvt_base::result do_unshift(std::mbstate_t&, char* /*from*/, char* /*to*/, char*& /*next*/) const override { return ok; }
int do_length(std::mbstate_t&, const char* /*from*/, const char* /*from_end*/, std::size_t /*max*/) const
#if BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600))
throw()
#endif
override
{ return 0; }
int do_max_length() const noexcept override { return 0; }
};
} // namespace detail
} // namespace filesystem
} // namespace boost
#include <boost/filesystem/detail/footer.hpp>
#endif // BOOST_WINDOWS_API
#endif // BOOST_FILESYSTEM_WINDOWS_FILE_CODECVT_HPP
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