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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2003-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
// See http://www.boost.org/libs/iostreams for documentation.
// Contains machinery for performing code conversion.
#ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
#define BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <cwchar> // mbstate_t.
#include <locale> // codecvt, locale.
#include <boost/config.hpp> // HAS_MACRO_USE_FACET.
#include <boost/iostreams/detail/config/codecvt.hpp>
namespace boost { namespace iostreams { namespace detail {
struct default_codecvt {
typedef wchar_t intern_type, from_type;
typedef char extern_type, to_type;
typedef std::mbstate_t state_type;
};
template<typename Codecvt>
struct codecvt_holder {
typedef Codecvt codecvt_type;
const codecvt_type& get() const { return codecvt_; }
void imbue(const std::locale&) { }
Codecvt codecvt_;
};
template<>
struct codecvt_holder<default_codecvt> {
typedef std::codecvt<wchar_t, char, std::mbstate_t> codecvt_type;
codecvt_holder() { reset_codecvt(); }
const codecvt_type& get() const { return *codecvt_; }
void imbue(const std::locale& loc)
{
loc_ = loc;
reset_codecvt();
}
void reset_codecvt()
{
using namespace std;
#ifndef BOOST_HAS_MACRO_USE_FACET
codecvt_ = & use_facet< codecvt_type >(loc_);
#else
codecvt_ = & _USE(loc_, codecvt_type);
#endif
}
std::locale loc_; // Prevent codecvt_ from being freed.
const codecvt_type* codecvt_;
};
} } } // End namespaces detail, iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HOLDER_HPP_INCLUDED
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