Class: RandomKISS

• Inheritance
• Description
• Related information
• Class protocol
  • instance creation
• Instance protocol
  • initialization
  • random numbers

Inheritance:

   Object
   |
   +--RandomKISS

Package:

stx:libbasic2

Category:

Magnitude-Numbers-Random

Version:

rev: 1.11 date: 2021/04/10 08:29:05

user: cg

file: RandomKISS.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Author:

Ported to Smalltalk by Claus Gittinger.

Description:

WARNING: this generator should NOT be used for cryptographic work.

NO WARRANTY

KISS combines a linear congruence, XorShift and Lag with carry generator.
The idea is from George Marsaglia.

RandomKISS new nextInteger
(RandomKISS new:5489) nextInteger

If heavily used, it may be useful to embed the original C code as inline C code for a big speedup)

Please read:
    Wikipedia article on KISS http://de.wikipedia.org/wiki/KISS_(Zufallszahlengenerator)
    http://de.wikipedia.org/wiki/Liste_von_Zufallszahlengeneratoren
    http://eprint.iacr.org/2011/007.pdf  (KISS is not cryptographically secure)

Related information:

    http://www0.cs.ucl.ac.uk/staff/d.jones/GoodPracticeRNG.pdf
    RandomGenerator
    -
    the
    default;
    uses
    the
    machine's
    /dev/random
    if
    available
    Random
    -
    fast,
    but
    generates
    less
    quality
    random
    numbers
    RandomTT800
    -
    another
    random
    generator
    RandomParkMiller
    -
    another
    random
    generator
    RandomMT19937
    -
    another
    random
    generator

Class protocol:

 new

(comment from inherited method)
return an instance of myself without indexed variables

 new: seed

(comment from inherited method)
return an instance of myself with anInteger indexed variables

Instance protocol:

 initialize

<- any seed != 0

 seed: seed

 nextBoolean

generates a boolean random

 nextInteger

generates the next integer in 0..FFFFFFFF