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/*-------------------------------------------------------------------------
*
* geqo_recombination.h
* prototypes for recombination in the genetic query optimizer
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/geqo_recombination.h,v 1.20 2009/01/01 17:24:00 momjian Exp $
*
*-------------------------------------------------------------------------
*/
/* contributed by:
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
* Martin Utesch * Institute of Automatic Control *
= = University of Mining and Technology =
* utesch@aut.tu-freiberg.de * Freiberg, Germany *
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
*/
/* -- parts of this are adapted from D. Whitley's Genitor algorithm -- */
#ifndef GEQO_RECOMBINATION_H
#define GEQO_RECOMBINATION_H
#include "optimizer/geqo_gene.h"
extern void init_tour(Gene *tour, int num_gene);
/* edge recombination crossover [ERX] */
typedef struct Edge
{
Gene edge_list[4]; /* list of edges */
int total_edges;
int unused_edges;
} Edge;
extern Edge *alloc_edge_table(int num_gene);
extern void free_edge_table(Edge *edge_table);
extern float gimme_edge_table(Gene *tour1, Gene *tour2, int num_gene, Edge *edge_table);
extern int gimme_tour(Edge *edge_table, Gene *new_gene, int num_gene);
/* partially matched crossover [PMX] */
#define DAD 1 /* indicator for gene from dad */
#define MOM 0 /* indicator for gene from mom */
extern void pmx(Gene *tour1, Gene *tour2, Gene *offspring, int num_gene);
typedef struct City
{
int tour2_position;
int tour1_position;
int used;
int select_list;
} City;
extern City *alloc_city_table(int num_gene);
extern void free_city_table(City *city_table);
/* cycle crossover [CX] */
extern int cx(Gene *tour1, Gene *tour2, Gene *offspring, int num_gene, City *city_table);
/* position crossover [PX] */
extern void px(Gene *tour1, Gene *tour2, Gene *offspring, int num_gene, City *city_table);
/* order crossover [OX1] according to Davis */
extern void ox1(Gene *mom, Gene *dad, Gene *offspring, int num_gene, City *city_table);
/* order crossover [OX2] according to Syswerda */
extern void ox2(Gene *mom, Gene *dad, Gene *offspring, int num_gene, City *city_table);
#endif /* GEQO_RECOMBINATION_H */
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