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// Copyright (c) 2016 Klemens D. Morgenstern
// Copyright (c) 2008 Beman Dawes
//
// 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)
#ifndef BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
#define BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
#include <locale>
#include <boost/core/ignore_unused.hpp>
#include <boost/detail/winapi/file_management.hpp>
#include <boost/detail/winapi/character_code_conversion.hpp>
namespace boost
{
namespace process
{
namespace detail
{
namespace windows
{
//copied from boost.filesystem
class windows_file_codecvt
: 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
{
boost::ignore_unused(state);
::boost::detail::winapi::UINT_ codepage = AreFileApisANSI() ?
::boost::detail::winapi::CP_ACP_ :
::boost::detail::winapi::CP_OEMCP_;
int count;
if ((count = ::boost::detail::winapi::MultiByteToWideChar(codepage,
::boost::detail::winapi::MB_PRECOMPOSED_, from,
static_cast<int>(from_end - from), to, static_cast<int>(to_end - to))) == 0)
{
return error; // conversion failed
}
from_next = from_end;
to_next = to + count;
*to_next = L'\0';
return ok;
}
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
{
boost::ignore_unused(state);
auto codepage = ::boost::detail::winapi::AreFileApisANSI() ?
::boost::detail::winapi::CP_ACP_ :
::boost::detail::winapi::CP_OEMCP_;
int count;
if ((count = ::boost::detail::winapi::WideCharToMultiByte(codepage,
::boost::detail::winapi::WC_NO_BEST_FIT_CHARS_, from,
static_cast<int>(from_end - from), to, static_cast<int>(to_end - to), 0, 0)) == 0)
{
return error; // conversion failed
}
from_next = from_end;
to_next = to + count;
*to_next = '\0';
return ok;
}
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 override { return 0; }
int do_max_length() const noexcept override { return 0; }
};
}
}
}
}
#endif /* BOOST_PROCESS_LOCALE_HPP_ */
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