gcc/libstdc++-v3/config/locale/messages_members_gnu.h

// std::messages implementation details, GNU version -*- C++ -*-

// Copyright (C) 2001 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// 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.

//
// ISO C++ 14882: 22.2.7.1.2  messages virtual functions
//

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

  // Non-virtual member functions.
  template<typename _CharT>
    messages<_CharT>::catalog 
    messages<_CharT>::open(const basic_string<char>& __s, const locale& __loc, 
			   const char* __dir) const
    { 
      bindtextdomain(__s.c_str(), __dir);
      return this->do_open(__s, __loc); 
    }

  // Virtual member functions.
  template<typename _CharT>
    messages<_CharT>::~messages()
    { 
      if (_M_c_locale_messages)
	_S_destroy_c_locale(_M_c_locale_messages); 
    }

  template<typename _CharT>
    messages<_CharT>::catalog 
    messages<_CharT>::do_open(const basic_string<char>& __s, 
			      const locale&) const
    { 
      // No error checking is done, assume the catalog exists and can
      // be used.
      textdomain(__s.c_str());
      return 0;
    }

  template<typename _CharT>
    messages<_CharT>::string_type  
    messages<_CharT>::do_get(catalog, int, int, 
			     const string_type& __dfault) const
    { 
#if 0
      // Requires glibc 2.3
      __c_locale __old = uselocale(_M_c_locale_messages);
      char* __msg = gettext(_M_convert_to_char(__dfault));
      uselocale(__old);
      return _M_convert_from_char(__msg);
#else
      setlocale(LC_ALL, _M_name_messages);
      char* __msg = gettext(_M_convert_to_char(__dfault));
      return _M_convert_from_char(__msg);
#endif
    }

  template<typename _CharT>
    void    
    messages<_CharT>::do_close(catalog) const 
    { }