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// $Id: ucd_io.h 3874 2010-07-02 21:57:26Z roystgnr $

// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, 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
// Lesser General Public License for more details.
  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef __ucd_io_h__
#define __ucd_io_h__

// Local includes
#include "libmesh_common.h"
#include "mesh_input.h"
#include "mesh_output.h"

namespace libMesh
{

// Forward declarations
class MeshBase;



/**
 * This class implements reading & writing meshes in the AVS's UCD format.
 *
 * @author Benjamin S. Kirk, 2004
 */

// ------------------------------------------------------------
// UCDIO class definition
class UCDIO : public MeshInput<MeshBase>,
	      public MeshOutput<MeshBase>
{
 public:
  
  /**
   * Constructor.  Takes a writeable reference to a mesh object.
   * This is the constructor required to read a mesh.
   */
  UCDIO (MeshBase&);

  /**
   * Constructor.  Takes a reference to a constant mesh object.
   * This constructor will only allow us to write the mesh.
   */
  UCDIO (const MeshBase&);
  
  /**
   * This method implements reading a mesh from a specified file
   * in UCD format.
   */
  virtual void read (const std::string& );
  
  /**
   * This method implements writing a mesh to a specified file
   * in UCD format.
   */
  virtual void write (const std::string& );

  
 private:
  
  /**
   * The actual implementation of the read function.
   * The public read interface simply decides which
   * type of stream to pass the implementation.
   */
  void read_implementation (std::istream& in_stream);

  /**
   * The actual implementation of the write function.
   * The public write interface simply decides which
   * type of stream to pass the implementation.
   */
  void write_implementation (std::ostream& out_stream);
  
};



// ------------------------------------------------------------
// UCDIO inline members
inline
UCDIO::UCDIO (MeshBase& mesh) :
  MeshInput<MeshBase> (mesh),
  MeshOutput<MeshBase>(mesh)
{
}



inline
UCDIO::UCDIO (const MeshBase& mesh) :
  MeshOutput<MeshBase> (mesh)
{
}


} // namespace libMesh


#endif // #define __ucd_io_h__