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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_FILESYSTEM3_WIN_FILE_CODECVT_HPP
#define BOOST_FILESYSTEM3_WIN_FILE_CODECVT_HPP
#include <boost/filesystem/v3/config.hpp>
#include <locale>
//------------------------------------------------------------------------------------//
// //
// 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_FILESYSTEM_DECL windows_file_codecvt
: public std::codecvt< wchar_t, char, std::mbstate_t >
{
public:
explicit windows_file_codecvt()
: std::codecvt<wchar_t, char, std::mbstate_t>() {}
protected:
virtual bool do_always_noconv() const throw() { return false; }
// seems safest to assume variable number of characters since we don't
// actually know what codepage is active
virtual int do_encoding() const throw() { return 0; }
virtual 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;
virtual 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;
virtual std::codecvt_base::result do_unshift(std::mbstate_t&,
char* /*from*/, char* /*to*/, char* & /*next*/) const { return ok; }
virtual int do_length(std::mbstate_t&,
const char* /*from*/, const char* /*from_end*/, std::size_t /*max*/) const { return 0; }
virtual int do_max_length() const throw () { return 0; }
};
#endif // BOOST_FILESYSTEM3_WIN_FILE_CODECVT_HPP
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