| // test_codecvt.hpp ------------------------------------------------------------------// |
| |
| // Copyright Beman Dawes 2009, 2010 |
| |
| // 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_TEST_CODECVT_HPP |
| #define BOOST_FILESYSTEM3_TEST_CODECVT_HPP |
| |
| #include <boost/filesystem/v3/config.hpp> |
| #include <locale> |
| #include <cwchar> // for mbstate_t |
| |
| //------------------------------------------------------------------------------------// |
| // // |
| // class test_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. // |
| // // |
| // The value of a wide character is the value of the corresponding narrow character // |
| // plus 1. This ensures that compares against expected values will fail if the // |
| // code conversion did not occur as expected. // |
| // // |
| //------------------------------------------------------------------------------------// |
| |
| class test_codecvt |
| : public std::codecvt< wchar_t, char, std::mbstate_t > |
| { |
| public: |
| explicit test_codecvt() |
| : std::codecvt<wchar_t, char, std::mbstate_t>() {} |
| protected: |
| |
| virtual bool do_always_noconv() const throw() { return false; } |
| |
| virtual int do_encoding() const throw() { return 0; } |
| |
| virtual std::codecvt_base::result do_in(std::mbstate_t&, |
| const char* from, const char* from_end, const char*& from_next, |
| wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const |
| { |
| for (; from != from_end && to != to_end; ++from, ++to) |
| *to = *from + 1; |
| if (to == to_end) |
| return error; |
| *to = L'\0'; |
| from_next = from; |
| to_next = to; |
| return ok; |
| } |
| |
| virtual std::codecvt_base::result do_out(std::mbstate_t&, |
| const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next, |
| char* to, char* to_end, char*& to_next) const |
| { |
| for (; from != from_end && to != to_end; ++from, ++to) |
| *to = static_cast<char>(*from - 1); |
| if (to == to_end) |
| return error; |
| *to = '\0'; |
| from_next = from; |
| to_next = to; |
| return ok; |
| } |
| |
| 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_TEST_CODECVT_HPP |