src/optarg.h

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/***************************************************************************
 *   Copyright (C) 2008/2009 by Matthias Ihrke                                  *
 *   mihrke@uni-goettingen.de                                              *
 *                                                                         *
 *   This program 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 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef OPTARG_H
# define OPTARG_H

#include "definitions.h"
#include "slist.h"
#include <stdarg.h>

#define NO_OPTARGS NULL

#ifdef __cplusplus
extern "C" {
#endif
  /*-----------------------------------------------------------
     - Optional Arguments
     ---------------------------------------------------------*/
  typedef struct {
     char    key[MAX_LABEL_LENGTH]; 
     bool    scalar;                
     char    type[MAX_LABEL_LENGTH];
     void    *data_ptr;             
     double  data_scalar;           
  } OptArg;

  typedef struct {
     int nargs; 
     OptArg *args; 
  } OptArgList;

#define optarg_PARSE_SCALAR( opts, label, var, type, tmp )  \
  if( optarglist_has_key( (opts), (label) ) ){                  \
     (tmp) = optarglist_scalar_by_key( (opts), (label) );       \
     if( !isnan( (tmp) ) ) (var)=(type)(tmp);                       \
  }

#define optarg_PARSE_PTR( opts, label, var, type, tmp )     \
  if( optarglist_has_key( (opts), (label) ) ){                  \
     (tmp) = optarglist_ptr_by_key( (opts), (label) );          \
     if( (tmp) ) (var)=(type)(tmp);                                 \
  }

  OptArgList* optarglist( char *format,  ... );
  OptArgList* optarglisttmp( char *format, ... );

  bool        optarglist_has_key( OptArgList *list, const char *key );

  double      optarglist_scalar_by_key( OptArgList *list, const char *key );
  void*       optarglist_ptr_by_key   ( OptArgList *list, const char *key );
  OptArg*     optarglist_optarg_by_key( OptArgList *list, const char *key );

  OptArgList* optarglist_append_arg   ( OptArgList *list, OptArg *arg );
  OptArgList* optarglist_delete_arg   ( OptArgList *list, OptArg *arg );

  void        optarglist_print( OptArgList *list, FILE *out );
  void        optarglist_free( OptArgList *list );

  OptArgList* optarglist_remove_freeflag( OptArgList *list, bool *removedflag );

  OptArg*     optarg_scalar( const char *key, double scalar );
  OptArg*     optarg_ptr   ( const char *key, void *ptr );

#ifdef __cplusplus
}
#endif


#endif