Module: PackerFiles::Utils::Size

Included in:
Core::Disk, Core::LogicalVolume, Virtual::KVM, Virtual::VMWare, Virtual::VirtualBox
Defined in:
lib/PackerFiles/Utils/Size.rb

Overview

Contains utility functions to manage size conversions

Constant Summary collapse

@@regex =

Array of regular expressions to match size and their corresponding lambda functions to return size in number. It is easy to understand the constants if we remember that Packer always accepts size in MiB [Power of 2].

{
  /([0-9]+)GiB/ =>  lambda {|n| 1024 * n},
  /([0-9]+)GB/  =>  lambda {|n| (953.67 * n).round},
  /([0-9]+)MB/  =>  lambda {|n| (0.95367 * n).round},
  /([0-9]+)MiB/ =>  lambda {|n| n},
  /([0-9]+)TiB/ =>  lambda {|n| 1048576 * n},
  /([0-9]+)TB/  =>  lambda {|n| (909486.46 * n).round},
  /([0-9]+)GHz/ =>  lambda {|n| 1024 * n},
  /([0-9]+)MHz/ =>  lambda {|n| n}
}

Instance Method Summary collapse

Instance Method Details

#Bytes(size) ⇒ Object

Convert MiB Size into Bytes



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# File 'lib/PackerFiles/Utils/Size.rb', line 36

def Bytes(size)
   size * 1024 * 1024
end

#MiB(size) ⇒ Object

Convert a text ‘size’ into a units of MiB. This is done calling the appropriate lambda function, whenever the regex is matched.



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# File 'lib/PackerFiles/Utils/Size.rb', line 27

def MiB(size)
   @@regex.each_pair do |r, l|
      if m = r.match(size)
         return l.call(m[1].to_i)
      end
   end
end