sirandom.c File Reference

#include "misc/auxiliary.h"
#include "sirandom.h"

Go to the source code of this file.

Macros
#define	A   16807 /* A "good" multiplier */
#define	M   2147483647 /* Modulus: 2^31 - 1 */
#define	Q   127773 /* M / A */
#define	R   2836 /* M % A */

Functions
int	siRandNext (int r)
int	siRand ()
int	siRandPlus1 (int r)

Variables
VAR int	siSeed = 1

Macro Definition Documentation

A

#define A   16807 /* A "good" multiplier */

Definition at line 24 of file sirandom.c.

M

else L M   2147483647 /* Modulus: 2^31 - 1 */

Definition at line 25 of file sirandom.c.

Q

#define Q   127773 /* M / A */

Definition at line 26 of file sirandom.c.

R

#define R   2836 /* M % A */

Definition at line 27 of file sirandom.c.

Function Documentation

siRand()

int siRand

(

void

)

Definition at line 42 of file sirandom.c.

{
  siSeed=siRandNext(siSeed);
  return siSeed;
}

siRandNext()

int siRandNext

(

int

r

)

Definition at line 32 of file sirandom.c.

{
  r = A * (r % Q) - R * (r / Q);
 
  if ( r < 0 )
    r += M;
 
  return( r );
}

siRandPlus1()

int siRandPlus1

(

int

r

)

Definition at line 47 of file sirandom.c.

{
  return r+1;
}

Variable Documentation

siSeed

VAR int siSeed = 1

Definition at line 30 of file sirandom.c.