From 96fcf3ea3a51071dfeca141b7c9b0e5e3e5365a8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 18:00:33 +0200 Subject: Adding upstream version 0.34. Signed-off-by: Daniel Baumann --- src/isaac_rand/isaac_rand.h | 52 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 src/isaac_rand/isaac_rand.h (limited to 'src/isaac_rand/isaac_rand.h') diff --git a/src/isaac_rand/isaac_rand.h b/src/isaac_rand/isaac_rand.h new file mode 100644 index 0000000..167a2fd --- /dev/null +++ b/src/isaac_rand/isaac_rand.h @@ -0,0 +1,52 @@ +/* +------------------------------------------------------------------------------ +rand.h: definitions for a random number generator +By Bob Jenkins, 1996, Public Domain +MODIFIED: + 960327: Creation (addition of randinit, really) + 970719: use context, not global variables, for internal state + 980324: renamed seed to flag + 980605: recommend RANDSIZL=4 for noncryptography. + 010626: note this is public domain +------------------------------------------------------------------------------ +*/ +#ifndef RAND +#define RAND + +#include "isaac_standard.h" + +/* context of random number generator */ +struct randctx +{ + ub4 randcnt; + ub4 randrsl[RANDSIZ]; + ub4 randmem[RANDSIZ]; + ub4 randa; + ub4 randb; + ub4 randc; +}; +typedef struct randctx randctx; + +/* +------------------------------------------------------------------------------ + If (flag==TRUE), then use the contents of randrsl[0..RANDSIZ-1] as the seed. +------------------------------------------------------------------------------ +*/ +void randinit(/*_ randctx *r, word flag _*/); + +void isaac(/*_ randctx *r _*/); + + +/* +------------------------------------------------------------------------------ + Call rand(/o_ randctx *r _o/) to retrieve a single 32-bit random value +------------------------------------------------------------------------------ +*/ +#define isaac_rand(r) \ + (!(r)->randcnt-- ? \ + (isaac(r), (r)->randcnt=RANDSIZ-1, (r)->randrsl[(r)->randcnt]) : \ + (r)->randrsl[(r)->randcnt]) + +#endif /* RAND */ + + -- cgit v1.2.3