// (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 |