source: Sophya/trunk/SophyaLib/BaseTools/srandgen.h@ 2323

/* fonctions pour generateurs aleatoires     */
/*                         cmv  23/06/94     */
/*  R.Ansari 04/2000  Copie de nbrand.h .c   */

#ifndef SRANDGEN_H_SEEN
#define SRANDGEN_H_SEEN

#include "machdefs.h"
#include <stdlib.h>
#ifdef __MWERKS__
#include "unixmac.h"
#endif

#if defined(Darwin) &&  defined(__GNUC__) && (__GNUC__ < 3)
/* Declaration de drand48 et srand48 etc , mis ds SysSpec 
                                          Reza 11/02/2003 */
unsigned short int * seed48 (unsigned short int seed16v[3]);
void srand48 (long seedval);
/* Faute de mieux pour le moment : */
double drand48() { return ((double)(random())/LONG_MAX) ; }
#endif

#define frand01() ( (float) drand48() )
#define drand01() ( drand48() )
#define ranf01() drand01()

#define frandpm1() ( 2. * frand01() - 1.)
#define drandpm1() ( 2. * drand01() - 1.)
#define ranfpm1() drandpm1()

struct tirage_alea {
  int Nbin;
  double Min,Max,Lbin;
  double *Tab;
};
typedef struct tirage_alea TIREALEA;

#ifdef __cplusplus
extern "C" {
#endif

void Ini_Ranf_Quick(long seed_val, int lp);
void Ini_Ranf(unsigned short seed_16v[3], int lp);
void Get_Ranf(unsigned short seed_16v[3], int lp);
void Auto_Ini_Ranf(int lp);

void SetGauRange(double range);
float NorRand1(void);
double GauRnd1(double am, double s);
float NorRand(void);
double GauRnd(double am, double s);
int NormCo(double *a,double *b
          ,double mx,double my,double sx,double sy,double ro);
void NormGau(double *x,double *y
            ,double mx,double my,double sa,double sb,double teta);

TIREALEA *init_tirage_alea(int nbin,double xmin,double xmax,double (*fonc) (double));
double tirage_alea(TIREALEA *alea);
int end_tirage_alea(TIREALEA *alea);

#ifdef __cplusplus
}
#endif

#endif