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/*-------------------------------------------------------------------------
*
* geqo.h--
* prototypes for various files in optimizer/geqo
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: geqo.h,v 1.6 1997/09/08 21:53:10 momjian 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 */
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