Class: SuperRandom

Inherits:
Object
  • Object
show all
Defined in:
lib/super_random/version.rb,
lib/super_random/super_random.rb

Constant Summary collapse

VERSION =
'0.0.1'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initializeSuperRandom

Returns a new instance of SuperRandom.


4
5
6
7
8
9
# File 'lib/super_random/super_random.rb', line 4

def initialize
  @first_timeout = 3
  @second_timeout = 6
  @nevermind = true
  @randomness = 0
end

Instance Attribute Details

#first_timeoutObject

Returns the value of attribute first_timeout.


3
4
5
# File 'lib/super_random/super_random.rb', line 3

def first_timeout
  @first_timeout
end

#lengthObject

Returns the value of attribute length.


3
4
5
# File 'lib/super_random/super_random.rb', line 3

def length
  @length
end

#nevermindObject

Returns the value of attribute nevermind.


3
4
5
# File 'lib/super_random/super_random.rb', line 3

def nevermind
  @nevermind
end

#randomnessObject

Returns the value of attribute randomness.


3
4
5
# File 'lib/super_random/super_random.rb', line 3

def randomness
  @randomness
end

#second_timeoutObject

Returns the value of attribute second_timeout.


3
4
5
# File 'lib/super_random/super_random.rb', line 3

def second_timeout
  @second_timeout
end

Instance Method Details

#bytes(n = 32) ⇒ Object


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
# File 'lib/super_random/super_random.rb', line 11

def bytes(n=32)
  @randomness = 0

  r1 = RealRand::RandomOrg.new
  r2 = RealRand::EntropyPool.new
  r3 = RealRand::FourmiLab.new

  a1 = a2 = a3 = nil

  t1 = Thread.new{ a1 = r1.randbyte(n) }
  t2 = Thread.new{ a2 = r2.randbyte(n) }
  t3 = Thread.new{ a3 = r3.randbyte(n) }

  begin
    Timeout.timeout(@first_timeout) do
      # Initially, would like to get them all.
      t1.join and t2.join and t3.join
    end
  rescue Timeout::Error
    begin
      Timeout.timeout(@second_timeout) do
        # But at this point,
        # would like to get at least one.
        while a1.nil? and a2.nil? and a3.nil? and (t1.alive? or t2.alive? or t3.alive?)
          Thread.pass
        end
      end
    rescue Timeout::Error
      # If we don't care that we got nothing, go on.
      raise $! unless @nevermind
    end
  end

  a = n.times.inject([]){|a,i|a.push(SecureRandom.random_number(256))}

  [a1, a2, a3].each do |b|
    if b
      @randomness += 1
      n.times{|i|a[i]=(a[i]+b[i])%256}
    end
  end

  return a
end

#hexadecimal(n = 32) ⇒ Object


56
57
58
# File 'lib/super_random/super_random.rb', line 56

def hexadecimal(n=32)
  bytes(n).map{|i|i.to_s(16).rjust(2,'0')}.join
end

#rand(m = nil, n = 6) ⇒ Object


60
61
62
63
64
# File 'lib/super_random/super_random.rb', line 60

def rand(m=nil, n=6)
  div = n.times.inject(''){|s,i| s+'FF'}.to_i(16).to_f
  r = hexadecimal(n).to_i(16).to_f / div
  m.nil? ? r : (m*r).to_i
end