geqo_random.h

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * geqo_random.h
 *    random number generator
 *
 * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/geqo_random.h
 *
 *-------------------------------------------------------------------------
 */
 
/* 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_RANDOM_H
#define GEQO_RANDOM_H
 
#include <math.h>
 
#include "optimizer/geqo.h"
 
 
extern void geqo_set_seed(PlannerInfo *root, double seed);
 
/* geqo_rand returns a random float value in the range [0.0, 1.0) */
extern double geqo_rand(PlannerInfo *root);
 
/* geqo_randint returns integer value between lower and upper inclusive */
extern int  geqo_randint(PlannerInfo *root, int upper, int lower);
 
#endif                          /* GEQO_RANDOM_H */