// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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// (C) Copyright 2003-2007 Jonathan Turkanis
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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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// See http://www.boost.org/libs/iostreams for documentation.
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// Contains machinery for performing code conversion.
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#ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
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#define BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <cwchar> // mbstate_t.
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#include <locale> // codecvt, locale.
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#include <boost/config.hpp> // HAS_MACRO_USE_FACET.
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#include <boost/iostreams/detail/config/codecvt.hpp>
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namespace boost { namespace iostreams { namespace detail {
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struct default_codecvt {
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typedef wchar_t intern_type, from_type;
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typedef char extern_type, to_type;
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typedef std::mbstate_t state_type;
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};
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template<typename Codecvt>
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struct codecvt_holder {
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typedef Codecvt codecvt_type;
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const codecvt_type& get() const { return codecvt_; }
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void imbue(const std::locale&) { }
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Codecvt codecvt_;
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};
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template<>
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struct codecvt_holder<default_codecvt> {
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typedef std::codecvt<wchar_t, char, std::mbstate_t> codecvt_type;
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codecvt_holder() { reset_codecvt(); }
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const codecvt_type& get() const { return *codecvt_; }
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void imbue(const std::locale& loc)
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{
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loc_ = loc;
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reset_codecvt();
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}
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void reset_codecvt()
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{
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using namespace std;
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#ifndef BOOST_HAS_MACRO_USE_FACET
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codecvt_ = & use_facet< codecvt_type >(loc_);
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#else
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codecvt_ = & _USE(loc_, codecvt_type);
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#endif
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}
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std::locale loc_; // Prevent codecvt_ from being freed.
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const codecvt_type* codecvt_;
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};
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} } } // End namespaces detail, iostreams, boost.
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#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
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