Module: Zippo::BinaryStructure::Base

Defined in:
lib/zippo/binary_structure/base.rb

Defined Under Namespace

Modules: ClassMethods, InstanceMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.after_structure_definition(&block) ⇒ Object 



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# File 'lib/zippo/binary_structure/base.rb', line 71

def after_structure_definition &block
  @hooks ||= []
  @hooks << block
end

.after_structure_definition_hooks_for(klass) ⇒ Object 



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# File 'lib/zippo/binary_structure/base.rb', line 66

def after_structure_definition_hooks_for(klass)
  @hooks.each do |hook|
    hook.call(klass)
  end if @hooks
end

Instance Method Details

#binary_structure(&block) ⇒ Object 



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# File 'lib/zippo/binary_structure/base.rb', line 35

def binary_structure &block
  @structure = Structure.create(self, &block)
  self.const_set :Packer, Class.new(BinaryPacker)
  self::Packer.structure = @structure
  self.const_set :Unpacker, Class.new(BinaryUnpacker)
  self::Unpacker.structure = @structure

  @structure.fields.each do |field|
    attr_reader field.name
    if @structure.dependent? field.name
      define_method "#{field.name}=" do |value|
        raise "can't mutate a dependent field"
      end
    else
      if field.dependent
        class_eval """
          def #{field.name}= value
            @#{field.dependent} = value.bytesize
            @#{field.name} = value
          end
        """
      else
        attr_writer field.name
      end
    end
  end
  include InstanceMethods
  extend ClassMethods
  Base.after_structure_definition_hooks_for(self)
end