/*! \file lib/phs_io.h
    Header file for reflection data phs importer
*/
//C Copyright (C) 2000-2006 Kevin Cowtan and University of York
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#ifndef CLIPPER_PHS_IO
#define CLIPPER_PHS_IO


#include "../core/hkl_datatypes.h"


namespace clipper
{

  //! PHS import/export parent class for clipper objects
  /*! This is the import/export class which can be linked to an phs
    file and be used to transfer data into or out of a Clipper
    data structure. */
  class PHSfile
  {
   public:
    //! Constructor: does nothing
    PHSfile();
    //! Destructor: close any file that was left open
    ~PHSfile();

    //! Open a file for read access
    void open_read( const String filename_in );
    //! Close a file after reading
    void close_read();
    //! Open a file for write access
    void open_write( const String filename_out );
    //! Close a file after writing
    void close_write();

    //! get file resolution
    Resolution resolution( const Cell& cell ) const;

    //! read the reflection list from the PHS file
    void import_hkl_info( HKL_info& target );
    //! mark a hkl_data for import from PHS file
    void import_hkl_data( HKL_data_base& cdata );

    //! write the reflection list to the PHS file
    void export_hkl_info( const HKL_info& target );
    //! mark a hkl_data for export to PHS file
    void export_hkl_data( const HKL_data_base& cdata );

  private:
    enum PHSmode { NONE, READ, WRITE };

    PHSmode mode;                        //!< file mode
    String filename;                     //!< input/output file
    HKL_data_base* f_sigf_i;             //!< input HKL_data object
    HKL_data_base* phi_wt_i;             //!< input HKL_data object
    const HKL_data_base* f_sigf_o;       //!< output HKL_data object
    const HKL_data_base* phi_wt_o;       //!< output HKL_data object
    //! object which supplies the hkl list (write mode only)
    const HKL_info* hkl_ptr;
  };


} // namespace clipper

#endif