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Class: RandomKISS


Inheritance:

   Object
   |
   +--RandomKISS

Package:
stx:libbasic2
Category:
Magnitude-Numbers-Random
Version:
rev: 1.9 date: 2018/03/02 13:04:26
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:

instance creation
o  new

o  new: seed


Instance protocol:

initialization
o  initialize
<- any seed != 0

o  seed: seed

random numbers
o  nextBoolean
generates a boolean random

o  nextInteger
generates the next integer in 0..FFFFFFFF



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