Class: GirFFI::Builders::MarshallingMethodBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/gir_ffi/builders/marshalling_method_builder.rb

Overview

Implements the creation mapping method for a callback or signal handler. This method converts arguments from C to Ruby, and the result from Ruby to C.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(receiver_info, argument_infos, return_value_info) ⇒ MarshallingMethodBuilder

Returns a new instance of MarshallingMethodBuilder.



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 17

def initialize receiver_info, argument_infos, return_value_info
  receiver_builder = make_argument_builder receiver_info
  argument_builders = argument_infos.map { |arg| make_argument_builder arg }
  return_value_builder =
    CallbackReturnValueBuilder.new(variable_generator, return_value_info)

  @argument_builder_collection =
    ArgumentBuilderCollection.new(return_value_builder, argument_builders,
                                  receiver_builder: receiver_builder)
  @template = MethodTemplate.new(self, @argument_builder_collection)
end

Class Method Details

.for_signal(receiver_info, argument_infos, return_value_info) ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 13

def self.for_signal receiver_info, argument_infos, return_value_info
  new receiver_info, argument_infos, return_value_info
end

Instance Method Details

#invocation ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 49

def invocation
  "wrap(closure.to_ptr).invoke_block(#{call_argument_list})"
end

#method_arguments ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 37

def method_arguments
  %w(closure return_value param_values _invocation_hint _marshal_data)
end

#method_definition ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 29

def method_definition
  @template.method_definition
end

#method_name ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 33

def method_name
  'marshaller'
end

#preparation ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 41

def preparation
  if param_names.size == 1
    ["#{param_names.first} = param_values.first.get_value_plain"]
  else
    ["#{param_names.join(', ')} = param_values.map(&:get_value_plain)"]
  end
end

#result ⇒ Object 



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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 53

def result
  if (name = @argument_builder_collection.return_value_name)
    ["return_value.set_value #{name}"]
  else
    []
  end
end

#singleton_method? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/builders/marshalling_method_builder.rb', line 61

def singleton_method?
  true
end