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/*
------------------------------------------------------------------------------
isaac64.h: definitions for a random number generator
Bob Jenkins, 1996, Public Domain
------------------------------------------------------------------------------
*/
#ifndef ISAAC64
#define ISAAC64
#include "isaac_standard.h"
struct rand64ctx
{
ub8 randrsl[RANDSIZ], randcnt;
ub8 mm[RANDSIZ];
ub8 aa, bb, cc;
};
typedef struct rand64ctx rand64ctx;
/*
------------------------------------------------------------------------------
If (flag==TRUE), then use the contents of randrsl[0..255] as the seed.
------------------------------------------------------------------------------
*/
void rand64init(rand64ctx *r, word flag);
void isaac64(rand64ctx *ctx);
/*
------------------------------------------------------------------------------
Call rand64() to retrieve a single 64-bit random value
------------------------------------------------------------------------------
*/
#define isaac64_rand() \
(!(r)->randcnt-- ? \
(isaac64(r), (r)->randcnt=RANDSIZ-1, (r)->randrsl[(r)->>randcnt]) : \
(r)->randrsl[(r)->randcnt])
#endif /* ISAAC64 */
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