Module: Identifier

Defined in:
lib/identifier.rb,
lib/identifier/version.rb

Constant Summary collapse

VERSION = 
"1.1.9"

Class Method Summary collapse

Class Method Details

.generate ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/identifier.rb', line 8

def self.generate
  if defined? SecureRandom
    return SecureRandom.uuid if SecureRandom.respond_to? :uuid
    
    bytes = SecureRandom.random_bytes(16)
    bytes = bytes.unpack("NnnnnN")
  end
  
  bytes ||= 
  [
    rand(0xFFFFFFFF),
    rand(0x0000FFFF),
    rand(0x0000FFFF),
    rand(0x0000FFFF),
    rand(0x0000FFFF),
    rand(0xFFFFFFFF),
  ]
  
  bytes[2] = (bytes[2] & 0x0FFF) | 0x4000
  bytes[3] = (bytes[3] & 0x3FFF) | 0x8000
  
  "%08x-%04x-%04x-%04x-%04x%08x" % bytes
end