/usr/include/ruli_isaac.h is in libruli4-dev 0.33-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | /*
ISAAC: a fast cryptographic random number generator
http://burtleburtle.net/bob/rand/isaacafa.html
------------------------------------------------------------------------------
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
------------------------------------------------------------------------------
$Id: ruli_isaac.h,v 1.1 2003/05/07 15:40:18 evertonm Exp $
*/
typedef unsigned long int isaac_ub4; /* unsigned 4-byte quantities */
#define ISAAC_UB4MAXVAL 0xffffffff
typedef signed long int isaac_sb4;
#define ISAAC_UB4BITS 32
#define ISAAC_SB4MAXVAL 0x7fffffff
typedef unsigned short int isaac_ub2;
#define ISAAC_UB2MAXVAL 0xffff
#define ISAAC_UB2BITS 16
typedef signed short int isaac_sb2;
#define ISAAC_SB2MAXVAL 0x7fff
typedef unsigned char isaac_ub1;
#define ISAAC_UB1MAXVAL 0xff
#define ISAAC_UB1BITS 8
typedef signed char isaac_sb1; /* signed 1-byte quantities */
#define ISAAC_SB1MAXVAL 0x7f
typedef int isaac_word; /* fastest type available */
#define isaac_bis(target,mask) ((target) |= (mask))
#define isaac_bic(target,mask) ((target) &= ~(mask))
#define isaac_bit(target,mask) ((target) & (mask))
#ifndef min
# define min(a,b) (((a)<(b)) ? (a) : (b))
#endif /* min */
#ifndef max
# define max(a,b) (((a)<(b)) ? (b) : (a))
#endif /* max */
#ifndef align
# define align(a) (((ub4)a+(sizeof(void *)-1))&(~(sizeof(void *)-1)))
#endif /* align */
#ifndef abs
# define abs(a) (((a)>0) ? (a) : -(a))
#endif
#define ISAAC_TRUE 1
#define ISAAC_FALSE 0
#define ISAAC_SUCCESS 0 /* 1 on VAX */
#ifndef ISAAC_RAND
#define ISAAC_RAND
#define ISAAC_RANDSIZL (8) /* I recommend 8 for crypto, 4 for simulations */
#define ISAAC_RANDSIZ (1<<ISAAC_RANDSIZL)
/* context of random number generator */
struct isaac_randctx
{
isaac_ub4 randcnt;
isaac_ub4 randrsl[ISAAC_RANDSIZ];
isaac_ub4 randmem[ISAAC_RANDSIZ];
isaac_ub4 randa;
isaac_ub4 randb;
isaac_ub4 randc;
};
typedef struct isaac_randctx isaac_randctx;
/*
------------------------------------------------------------------------------
If (flag==TRUE), then use the contents of randrsl[0..RANDSIZ-1] as the seed.
------------------------------------------------------------------------------
*/
void isaac_randinit(isaac_randctx *r, isaac_word flag);
void isaac(isaac_randctx *r);
/*
------------------------------------------------------------------------------
Call isaac_rand(/o_ randctx *r _o/) to retrieve a single 32-bit random value
------------------------------------------------------------------------------
*/
#define isaac_rand(r) \
(!(r)->randcnt-- ? \
(isaac(r), (r)->randcnt=ISAAC_RANDSIZ-1, (r)->randrsl[(r)->randcnt]) : \
(r)->randrsl[(r)->randcnt])
#endif /* RAND */
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