Puppet Function: to_bytes

Defined in:
lib/puppet/parser/functions/to_bytes.rb
Function type:
Ruby 3.x API

Overview

to_bytes() ⇒ Any

Converts the argument into bytes, for example 4 kB becomes 4096. Takes a single string value as an argument. These conversions reflect a layperson’s understanding of 1 MB = 1024 KB, when in fact 1 MB = 1000 KB, and 1 MiB = 1024 KiB.

Returns:

  • (Any) 


5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/puppet/parser/functions/to_bytes.rb', line 5

newfunction(:to_bytes, :type => :rvalue, :doc => <<-DOC
  Converts the argument into bytes, for example 4 kB becomes 4096.
  Takes a single string value as an argument.
  These conversions reflect a layperson's understanding of
  1 MB = 1024 KB, when in fact 1 MB = 1000 KB, and 1 MiB = 1024 KiB.
  DOC
           ) do |arguments|

  raise(Puppet::ParseError, "to_bytes(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.size != 1

  arg = arguments[0]

  return arg if arg.is_a? Numeric

  value, prefix = *%r{([0-9.e+-]*)\s*([^bB]?)}.match(arg)[1, 2]

  value = value.to_f
  case prefix
  when '' then return value.to_i
  when 'k' then return (value * (1 << 10)).to_i
  when 'M' then return (value * (1 << 20)).to_i
  when 'G' then return (value * (1 << 30)).to_i
  when 'T' then return (value * (1 << 40)).to_i
  when 'P' then return (value * (1 << 50)).to_i
  when 'E' then return (value * (1 << 60)).to_i
  else raise Puppet::ParseError, "to_bytes(): Unknown prefix #{prefix}"
  end
end