Class: RandomBlumBlumShub

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

Inheritance:

   Object
   |
   +--RandomBlumBlumShub

Package:

stx:libbasic2

Category:

Magnitude-Numbers-Random

Version:

rev: 1.3 date: 2018/03/02 13:04:31

user: cg

file: RandomBlumBlumShub.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Author:

Claus Gittinger.

Description:

NO WARRANTY

This generator uses the blum blub shub algorithm to generate random numbers.
It is very slow, but considered to provide good random numbers.

RandomBlumBlumShub new nextInteger

Related information:

    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
    RandomKISS
    -
    another
    random
    generator
    [xept]
    -
    a
    library
    containing
    more
    stuff
    based
    on
    hashes
    and
    cyphers

Class protocol:

 new

 new: seed

Instance protocol:

 initialize

The two primes, p and q, should both be congruent to 3 (mod 4)

usage example(s):

self new initialize

 seed: seedArg

 nextBoolean

generates the next random boolean

 nextInteger

generates the next integer in 0..FFFFFFFF

usage example(s):

self new nextInteger. |r| r := self new 100 timesRepeat:[ Transcript showCR:r nextInteger].