/*
   Copyright (C) 2011  Statoil ASA, Norway. 
    
   The file 'subst_func.h' is part of ERT - Ensemble based Reservoir Tool. 
    
   ERT 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 3 of the License, or 
   (at your option) any later version. 
    
   ERT 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 at <http://www.gnu.org/licenses/gpl.html> 
   for more details. 
*/

#ifndef __SUBST_FUNC_H__
#define __SUBST_FUNC_H__
#ifdef __cplusplus
extern "C" {
#endif

#include <stringlist.h>

typedef  char * (subst_func_ftype) (const stringlist_type * , void * );
typedef  struct subst_func_struct        subst_func_type;
typedef  struct subst_func_pool_struct   subst_func_pool_type;


  char  *  subst_func_eval( const subst_func_type * subst_func , const stringlist_type * args);

/*****************************************************************/

subst_func_pool_type * subst_func_pool_alloc( );
void                   subst_func_pool_free( subst_func_pool_type * pool );
  void                   subst_func_pool_add_func( subst_func_pool_type * pool , const char * func_name , const char * doc_string , subst_func_ftype * func , bool vararg, int argc_min , int argc_max , void * arg);
subst_func_type      * subst_func_pool_get_func( const subst_func_pool_type * pool , const char * func_name );
bool                   subst_func_pool_has_func( const subst_func_pool_type * pool , const char * func_name );
UTIL_IS_INSTANCE_HEADER( subst_func_pool );

/*****************************************************************/
char * subst_func_randint( const stringlist_type * args , void * arg);
char * subst_func_randfloat( const stringlist_type * args , void * arg);
char * subst_func_add( const stringlist_type * args , void * arg);
char * subst_func_mul( const stringlist_type * args , void * arg);
char * subst_func_exp( const stringlist_type * args , void * arg);
char * subst_func_log( const stringlist_type * args , void * arg);
char * subst_func_pow10( const stringlist_type * args , void * arg);


#ifdef __cplusplus
}
#endif
#endif