112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
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// Copyright (c) 2016 Klemens D. Morgenstern
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// Copyright (c) 2008 Beman Dawes
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
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#define BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
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#include <locale>
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#include <boost/core/ignore_unused.hpp>
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#include <boost/winapi/file_management.hpp>
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#include <boost/winapi/character_code_conversion.hpp>
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namespace boost
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{
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namespace process
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{
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namespace detail
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{
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namespace windows
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{
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//copied from boost.filesystem
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class windows_file_codecvt
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: public std::codecvt< wchar_t, char, std::mbstate_t >
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{
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public:
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explicit windows_file_codecvt(std::size_t refs = 0)
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: std::codecvt<wchar_t, char, std::mbstate_t>(refs) {}
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protected:
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bool do_always_noconv() const noexcept override { return false; }
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// seems safest to assume variable number of characters since we don't
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// actually know what codepage is active
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int do_encoding() const noexcept override { return 0; }
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std::codecvt_base::result do_in(std::mbstate_t& state,
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const char* from, const char* from_end, const char*& from_next,
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wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const override
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{
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boost::ignore_unused(state);
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auto codepage =
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#if !defined(BOOST_NO_ANSI_APIS)
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::boost::winapi::AreFileApisANSI() ?
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::boost::winapi::CP_ACP_ :
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#endif
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::boost::winapi::CP_OEMCP_;
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int count = 0;
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if ((count = ::boost::winapi::MultiByteToWideChar(codepage,
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::boost::winapi::MB_PRECOMPOSED_, from,
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static_cast<int>(from_end - from), to, static_cast<int>(to_end - to))) == 0)
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{
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return error; // conversion failed
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}
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from_next = from_end;
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to_next = to + count;
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*to_next = L'\0';
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return ok;
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}
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std::codecvt_base::result do_out(std::mbstate_t & state,
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const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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char* to, char* to_end, char*& to_next) const override
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{
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boost::ignore_unused(state);
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auto codepage =
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#if !defined(BOOST_NO_ANSI_APIS)
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::boost::winapi::AreFileApisANSI() ?
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::boost::winapi::CP_ACP_ :
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#endif
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::boost::winapi::CP_OEMCP_;
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int count = 0;
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if ((count = ::boost::winapi::WideCharToMultiByte(codepage,
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::boost::winapi::WC_NO_BEST_FIT_CHARS_, from,
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static_cast<int>(from_end - from), to, static_cast<int>(to_end - to), 0, 0)) == 0)
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{
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return error; // conversion failed
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}
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from_next = from_end;
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to_next = to + count;
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*to_next = '\0';
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return ok;
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}
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std::codecvt_base::result do_unshift(std::mbstate_t&,
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char* /*from*/, char* /*to*/, char* & /*next*/) const override { return ok; }
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int do_length(std::mbstate_t&,
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const char* /*from*/, const char* /*from_end*/, std::size_t /*max*/) const override { return 0; }
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int do_max_length() const noexcept override { return 0; }
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};
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}
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}
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}
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}
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#endif /* BOOST_PROCESS_LOCALE_HPP_ */
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