ISAACRandom.cpp File Reference

#include <cstring>
#include "../TypeDefs.h"
#include "standard.h"
#include "ISAACRandom.h"

Include dependency graph for ISAACRandom.cpp:

Macros
#define	ind(mm, x)   (*(uint32_t *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<2))))
#define	rngstep(mix, a, b, mm, m, m2, r, x)
#define	mix(a, b, c, d, e, f, g, h)
#define	shuffle(a, b, mm, m, m2, r, x)

Functions
void	isaacSeed (char *seed, RandContext *ctx)
void	isaacInit (bool hasSeed, RandContext *ctx)
void	isaacRandom (RandContext *ctx)
uint32_t	randInt (RandContext *ctx)
void	randBytes (RandContext *ctx, uchar *buf, int count)

Macro Definition Documentation

ind

#define ind	(		mm,
			x
	)		(*(uint32_t *)((ub1 *)(mm) + ((x) & ((RANDSIZ-1)<<2))))

mix

#define mix	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

{ \
   a^=b<<11; d+=a; b+=c; \
   b^=c>>2;  e+=b; c+=d; \
   c^=d<<8;  f+=c; d+=e; \
   d^=e>>16; g+=d; e+=f; \
   e^=f<<10; h+=e; f+=g; \
   f^=g>>4;  a+=f; g+=h; \
   g^=h<<8;  b+=g; h+=a; \
   h^=a>>9;  c+=h; a+=b; \
}

rngstep

#define rngstep	(		mix,
			a,
			b,
			mm,
			m,
			m2,
			r,
			x
	)

Value:

{ \
  x = *m;  \
  a = (a^(mix)) + *(m2++); \
  *(m++) = y = ind(mm,x) + a + b; \
  *(r++) = b = ind(mm,y>>RANDSIZL) + x; \
}

shuffle

#define shuffle	(		a,
			b,
			mm,
			m,
			m2,
			r,
			x
	)

Value:

{ \
    rngstep((a << 13),    a, b, mm, m, m2, r, x); \
    rngstep((a >> 6),     a, b, mm, m, m2, r, x); \
    rngstep((a << 2),     a, b, mm, m, m2, r, x); \
    rngstep((a >> 16),    a, b, mm, m, m2, r, x); \
}

Function Documentation

isaacInit()

void isaacInit	(	bool	hasSeed,
		RandContext *	ctx
	)

isaacRandom()

void isaacRandom

(

RandContext *

ctx

)

isaacSeed()

void isaacSeed	(	char *	seed,
		RandContext *	ctx
	)

randBytes()

void randBytes	(	RandContext *	ctx,
		uchar *	buf,
		int	count
	)

randInt()

uint32_t randInt

(

RandContext *

ctx

)