Module: Packable::ClassMethods

Defined in:
lib/packable/mixin.rb

Instance Method Summary collapse

Instance Method Details

#read_packed(io, options) ⇒ Object

Default read_packed calls either the instance method read_packed or the class method unpack_string. Choose:

  • define a class method read_packed that returns the newly read object

  • define an instance method read_packed which reads the io into self

  • define a class method unpack_string that reads and returns an object from the string. In this case, options should be specified!



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# File 'lib/packable/mixin.rb', line 46

def read_packed(io, options)
  if method_defined? :read_packed
    mandatory = instance_method(:initialize).arity
    mandatory = -1-mandatory if mandatory < 0
    obj = new(*[nil]*mandatory)
    obj.read_packed(io, options)
    obj
  else
    len = options[:bytes]
    s = len ? io.read_exactly(len) : io.read
    unpack_string(s, options) unless s.nil?
  end
end

#unpack(s, options = :default) ⇒ Object 



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# File 'lib/packable/mixin.rb', line 35

def unpack(s, options = :default)
  return s.unpack(options).first if options.is_a? String
  StringIO.new(s).packed.read(self, options)
end