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// Copyright (C) 2000, 2002, 2004, 2005 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 2, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

// Written by Benjamin Kosnik <bkoz@redhat.com>

#include <locale>

namespace std

{

  // Definitions for locale::id of standard facets that are specialized.

 locale::id codecvt<char, char, mbstate_t>::id;

#ifdef _GLIBCXX_USE_WCHAR_T  

  locale::id codecvt<wchar_t, char, mbstate_t>::id;

#endif

  codecvt<char, char, mbstate_t>::

  codecvt(size_t __refs)

  : __codecvt_abstract_base<char, char, mbstate_t>(__refs),

  _M_c_locale_codecvt(_S_get_c_locale())

  { }

  codecvt<char, char, mbstate_t>::

  codecvt(__c_locale __cloc, size_t __refs)

  : __codecvt_abstract_base<char, char, mbstate_t>(__refs),

  _M_c_locale_codecvt(_S_clone_c_locale(__cloc))

  { }

  codecvt<char, char, mbstate_t>::

  ~codecvt()

  { _S_destroy_c_locale(_M_c_locale_codecvt); }

  codecvt_base::result

  codecvt<char, char, mbstate_t>::

  do_out(state_type&, const intern_type* __from,

         const intern_type*, const intern_type*& __from_next,

         extern_type* __to, extern_type*,

         extern_type*& __to_next) const

  {

    // _GLIBCXX_RESOLVE_LIB_DEFECTS

    // According to the resolution of DR19, "If returns noconv [...]

    // there are no changes to the values in [to, to_limit)."

    __from_next = __from;

    __to_next = __to;

    return noconv;

  }

  codecvt_base::result

  codecvt<char, char, mbstate_t>::

  do_unshift(state_type&, extern_type* __to,

             extern_type*, extern_type*& __to_next) const

  {

    __to_next = __to;

    return noconv;

  }

  codecvt_base::result

  codecvt<char, char, mbstate_t>::

  do_in(state_type&, const extern_type* __from,

        const extern_type*, const extern_type*& __from_next,

        intern_type* __to, intern_type*, intern_type*& __to_next) const

  {

    // _GLIBCXX_RESOLVE_LIB_DEFECTS

    // According to the resolution of DR19, "If returns noconv [...]

    // there are no changes to the values in [to, to_limit)."

    __from_next = __from;

    __to_next = __to;

    return noconv;

  }

  int

  codecvt<char, char, mbstate_t>::

  do_encoding() const throw()

  { return 1; }

  bool

  codecvt<char, char, mbstate_t>::

  do_always_noconv() const throw()

  { return true; }

  int

  codecvt<char, char, mbstate_t>::

  do_length (state_type&, const extern_type* __from,

             const extern_type* __end, size_t __max) const

  {

    size_t __d = static_cast<size_t>(__end - __from);

    return std::min(__max, __d);

  }

  int

  codecvt<char, char, mbstate_t>::

  do_max_length() const throw()

  { return 1; }

#ifdef _GLIBCXX_USE_WCHAR_T

  // codecvt<wchar_t, char, mbstate_t> required specialization

  codecvt<wchar_t, char, mbstate_t>::

  codecvt(size_t __refs)

  : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs),

  _M_c_locale_codecvt(_S_get_c_locale())

  { }

  codecvt<wchar_t, char, mbstate_t>::

  codecvt(__c_locale __cloc, size_t __refs)

  : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs),

  _M_c_locale_codecvt(_S_clone_c_locale(__cloc))

  { }

  codecvt<wchar_t, char, mbstate_t>::

  ~codecvt()

  { _S_destroy_c_locale(_M_c_locale_codecvt); }

  codecvt_base::result

  codecvt<wchar_t, char, mbstate_t>::

  do_unshift(state_type&, extern_type* __to,

             extern_type*, extern_type*& __to_next) const

  {

    // XXX Probably wrong for stateful encodings

    __to_next = __to;

    return noconv;

  }

  bool

  codecvt<wchar_t, char, mbstate_t>::

  do_always_noconv() const throw()

  { return false; }

#endif //  _GLIBCXX_USE_WCHAR_T

} // namespace std