Class: Bayonetta::PKZFile

Inherits:
LibBin::Structure
  • Object
show all
Defined in:
lib/bayonetta/pkz.rb

Defined Under Namespace

Classes: FileDescriptor, Header

Class Method Summary collapse

Class Method Details

.is_big?(f) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bayonetta/pkz.rb', line 29

def self.is_big?(f)
  f.rewind
  block = lambda { |int64|
    id = f.read(4)
    raise "Invalid id #{id.inspect}!" if id != "pkzl".b
    f.read(4)
    size = f.read(8).unpack(int64).first
    size == f.size
  }
  big = block.call("q>")
  f.rewind
  small = block.call("q<")
  f.rewind
  raise "Invalid data!" unless big ^ small
  return big
end

.load(input_name) ⇒ Object 



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# File 'lib/bayonetta/pkz.rb', line 46

def self.load(input_name)
  if input_name.respond_to?(:read) && input_name.respond_to?(:seek)
    input = input_name
  else
    input = File.open(input_name, "rb")
  end
  input_big = is_big?(input)
  pkz = self::new
  pkz.instance_variable_set(:@__was_big, input_big)
  pkz.__load(input, input_big)
  input.close unless input_name.respond_to?(:read) && input_name.respond_to?(:seek)

  pkz
end