1 // Copyright (c) 2016 Klemens D. Morgenstern
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2 // Copyright (c) 2008 Beman Dawes
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4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
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5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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7 #ifndef BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
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8 #define BOOST_PROCESS_DETAIL_WINDOWS_LOCALE_HPP_
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11 #include <boost/core/ignore_unused.hpp>
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12 #include <boost/detail/winapi/file_management.hpp>
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13 #include <boost/detail/winapi/character_code_conversion.hpp>
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24 //copied from boost.filesystem
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25 class windows_file_codecvt
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26 : public std::codecvt< wchar_t, char, std::mbstate_t >
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29 explicit windows_file_codecvt(std::size_t refs = 0)
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30 : std::codecvt<wchar_t, char, std::mbstate_t>(refs) {}
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33 bool do_always_noconv() const noexcept override { return false; }
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35 // seems safest to assume variable number of characters since we don't
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36 // actually know what codepage is active
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37 int do_encoding() const noexcept override { return 0; }
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39 std::codecvt_base::result do_in(std::mbstate_t& state,
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40 const char* from, const char* from_end, const char*& from_next,
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41 wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const override
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43 boost::ignore_unused(state);
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44 ::boost::detail::winapi::UINT_ codepage = AreFileApisANSI() ?
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45 ::boost::detail::winapi::CP_ACP_ :
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46 ::boost::detail::winapi::CP_OEMCP_;
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49 if ((count = ::boost::detail::winapi::MultiByteToWideChar(codepage,
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50 ::boost::detail::winapi::MB_PRECOMPOSED_, from,
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51 static_cast<int>(from_end - from), to, static_cast<int>(to_end - to))) == 0)
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53 return error; // conversion failed
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56 from_next = from_end;
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57 to_next = to + count;
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62 std::codecvt_base::result do_out(std::mbstate_t & state,
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63 const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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64 char* to, char* to_end, char*& to_next) const override
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66 boost::ignore_unused(state);
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67 auto codepage = ::boost::detail::winapi::AreFileApisANSI() ?
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68 ::boost::detail::winapi::CP_ACP_ :
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69 ::boost::detail::winapi::CP_OEMCP_;
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72 if ((count = ::boost::detail::winapi::WideCharToMultiByte(codepage,
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73 ::boost::detail::winapi::WC_NO_BEST_FIT_CHARS_, from,
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74 static_cast<int>(from_end - from), to, static_cast<int>(to_end - to), 0, 0)) == 0)
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76 return error; // conversion failed
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79 from_next = from_end;
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80 to_next = to + count;
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85 std::codecvt_base::result do_unshift(std::mbstate_t&,
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86 char* /*from*/, char* /*to*/, char* & /*next*/) const override { return ok; }
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88 int do_length(std::mbstate_t&,
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89 const char* /*from*/, const char* /*from_end*/, std::size_t /*max*/) const override { return 0; }
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91 int do_max_length() const noexcept override { return 0; }
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103 #endif /* BOOST_PROCESS_LOCALE_HPP_ */
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