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- // 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/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 = wchar_t(*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
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