gz.hh

// Copyright (C) 2001, 2002, 2003, 2004  EPITA Research and Development Laboratory
//
// This file is part of the Olena Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License version 2 as published by the
// Free Software Foundation.
//
// 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.

#ifndef OLENA_IO_GZ_HH
# define OLENA_IO_GZ_HH

# include <oln/io/stream_wrapper.hh>
# include <oln/io/gz_stream.hh>

namespace oln {

  namespace io {

    namespace internal {
      

      template<>
      struct stream_wrapper<StreamGz>
      {
        

        static const std::string& 
        name()
        { 
          static const std::string name_("gz:"); 
          return name_; 
        }

        
        static bool 
        knows_ext(const std::string& ext)
        { 
          return ext == "gz" || ext == "z"; 
        }
        
        
        static void 
        adjust_name(std::string& name)
        {
          std::string ext = utils::extension(name);
          if (knows_ext(ext))
            name.erase(name.rfind('.'));
        }
        
        static std::istream* 
        wrap_in(std::string& name)
        {
          gz::zifstream* in = new gz::zifstream(name.c_str());
          if (!in->fail())
            {
              adjust_name(name);
              return in;
            }
          delete in;
          return 0;
        }

        static std::ostream* 
        wrap_out(std::string& name)
        {
          gz::zofstream* out = new gz::zofstream(name.c_str());
          if (!out->fail())
            {
              adjust_name(name);
              return out;
            }
          delete out;
          return 0;
        }

        static void 
        find(std::list<std::string>&, const std::string&) 
        {}
      };

    } // end of namespace internal

  } // end of namespace io

} // end of namespace oln

#endif // ! OLENA_IO_GZ_HH

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