pdscongruential.h

/*
 * pdscongruential.h
 * 
 * Copyright 2011 Fernando Pujaico Rivera <fernando.pujaico.rivera@gmail.com>
 * 
 * This program 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 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 */

#ifndef __PDSCONGRUENTIAL_H__
#define __PDSCONGRUENTIAL_H__

#include <stdio.h>
#include <pds/pdsrvglobal.h>
#include <pds/pdsvector.h>

#ifdef __cplusplus
extern "C" {
#endif 

#define PDS_RAND_MAX 2147483648UL

#define LN_PDS_RAND_MAX  21.487562597

#define _2LN_PDS_RAND_MAX 42.975125195


typedef struct 
{
        PdsRvNaturalD x0;

        PdsRvNaturalD a;

        PdsRvNaturalD c;

        PdsRvNaturalD xn;
}PdsCongruential;

PdsCongruential *pds_congruential_new(void);

int pds_congruential_init(PdsCongruential *X,PdsRvNaturalD x0);

int pds_congruential_get_value(PdsCongruential *X,PdsRvNaturalD *x);


int pds_congruential_get_last_value(PdsCongruential *X,PdsRvNaturalD *x);


void pds_congruential_free(PdsCongruential *X);



void pds_congruential_destroy(PdsCongruential **X);

#ifdef __cplusplus
}
#endif 

#endif /* __PDSCONGRUENTIAL_H__ */