#ifndef BOOST_ARCHIVE_CODECVT_NULL_HPP

#define BOOST_ARCHIVE_CODECVT_NULL_HPP



// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)

# pragma once

#endif



/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8

// codecvt_null.hpp:



// (C) Copyright 2004 Robert Ramey - http://www.rrsd.com .

// Use, modification and distribution is subject to 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 for updates, documentation, and revision history.



#include <locale>

#include <cstddef>



#include <boost/config.hpp>

#include <boost/archive/detail/auto_link_archive.hpp>



namespace std{

    #if defined(__LIBCOMO__)

        using ::mbstate_t;

    #elif defined(__QNXNTO__)

        //using std::mbstate_t;

    #elif defined(BOOST_DINKUMWARE_STDLIB) && BOOST_DINKUMWARE_STDLIB == 1

        using ::mbstate_t;

    #elif defined(__SGI_STL_PORT)

    #elif defined(BOOST_NO_STDC_NAMESPACE)

        using ::codecvt;

        using ::mbstate_t;

    #elif defined(BOOST_RWSTD_VER)

        using ::mbstate_t;

   #endif

} // namespace std



namespace boost {

namespace archive {



template<class Ch>

class codecvt_null;



template<>

class codecvt_null<char> : public std::codecvt<char, char, std::mbstate_t>

{

    virtual bool do_always_noconv() const throw() {

        return true;

    }

public:

    explicit codecvt_null(std::size_t no_locale_manage = 0) :

        std::codecvt<char, char, std::mbstate_t>(no_locale_manage)

    {}

};



template<>

class codecvt_null<wchar_t> : public std::codecvt<wchar_t, char, std::mbstate_t>

{

    virtual BOOST_ARCHIVE_DECL(std::codecvt_base::result)

    do_out(

        std::mbstate_t & state,

        const wchar_t * first1,

        const wchar_t * last1,

        const wchar_t * & next1,

        char * first2,

        char * last2,

        char * & next2

    ) const;

    virtual BOOST_ARCHIVE_DECL(std::codecvt_base::result)

    do_in(

        std::mbstate_t & state,

        const char * first1,

        const char * last1,

        const char * & next1,

        wchar_t * first2,

        wchar_t * last2,

        wchar_t * & next2

    ) const;

    virtual int do_encoding( ) const throw( ){

        return sizeof(wchar_t) / sizeof(char);

    }

    virtual int do_max_length( ) const throw( ){

        return do_encoding();

    }

};



} // namespace archive

} // namespace boost



#endif //BOOST_ARCHIVE_CODECVT_NULL_HPP

