/*-------------------------------------------------------------------------
 *
 * geqo.h--
 *    prototypes for various files in optimizer/geqo
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: geqo.h,v 1.1 1997/02/19 12:58:28 scrappy Exp $
 *
 *-------------------------------------------------------------------------
 */

/* contributed by:
   =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
   *  Martin Utesch              * Institute of Automatic Control      *
   =                             = University of Mining and Technology =
   *  utesch@aut.tu-freiberg.de  * Freiberg, Germany                   *
   =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
 */

#ifndef	GEQO_H
#define	GEQO_H


/* GEQO debug flag */
/*
 #define GEQO_DEBUG
*/

/* recombination mechanism */
/*
 #define ERX
 #define PMX
 #define CX
 #define PX
 #define OX1
 #define OX2
 */
#define ERX


/* genetic algorithm parameters */

#define GEQO_FILE "pg_geqo"      /* Name of the ga config file */

#define MIN_POOL 128  /* minimum number of individuals */
#define MAX_POOL 1024 /* maximum number of individuals */

#define LOW_EFFORT 1            /* optimization effort values */
#define MEDIUM_EFFORT 40        /* are multipliers for computed */
#define HIGH_EFFORT 80          /* number of generations */

#define SELECTION_BIAS 2.0 /* selective pressure within population */
                           /* should be 1.5 <= SELECTION_BIAS <= 2.0 */

 int     PoolSize;
 int     Generations;

 long  RandomSeed; /* defaults to (long) time(NULL) in geqo_params.c */
 double   SelectionBias;

/* logarithmic base for rel->size decrease in case of long
   queries that cause an integer overflow; used in geqo_eval.c */

#define GEQO_LOG_BASE 1.5 /* should be 1.0 < GEQO_LOG_BASE <= 2.0 */
                          /*              ^^^                     */

/* geqo prototypes */
extern Rel *geqo(Query *root);

extern void geqo_params(int string_length);

extern Cost geqo_eval (Query *root, Gene *tour, int num_gene);
double geqo_log(double x, double b);
extern Rel *gimme_tree(Query *root, Gene *tour, int rel_count, int num_gene, Rel *outer_rel);


#endif /* GEQO_H */
