Class: GirFFI::Builders::CToRubyConvertor

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

Overview

Builder that generates code to convert values from C to Ruby. Used by argument builders.

Direct Known Subclasses

FullCToRubyConvertor

Instance Method Summary collapse

Constructor Details

#initialize(type_info, argument, length_arg, ownership_transfer: nil) ⇒ CToRubyConvertor

Returns a new instance of CToRubyConvertor.



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# File 'lib/gir_ffi/builders/c_to_ruby_convertor.rb', line 8

def initialize(type_info, argument, length_arg, ownership_transfer: nil)
  @type_info = type_info
  @argument = argument
  @length_arg = length_arg
  @ownership_transfer = ownership_transfer
end

Instance Method Details

#conversion ⇒ Object 



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# File 'lib/gir_ffi/builders/c_to_ruby_convertor.rb', line 15

def conversion
  case @type_info.flattened_tag
  when :utf8, :filename
    if @ownership_transfer == :everything
      "GirFFI::AllocationHelper.free_after #{@argument}, &:to_utf8"
    else
      "#{@argument}.to_utf8"
    end
  when :object
    base = "#{@type_info.argument_class_name}.wrap(#{conversion_argument_list})"
    @ownership_transfer == :nothing ? "#{base}.tap { |it| it && it.ref }" : base
  else
    "#{argument_class}.#{conversion_method}(#{conversion_argument_list})"
  end
end