Sitar

Sitar is easy to use the fiddle.

Installation

Add this line to your application's Gemfile:

gem 'sitar'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sitar

Usage

You can used C method only to extend sitar and load shared library like follow:

C function in libsample.so

int add(int a, int b) {
  return a + b;
}

Use in ruby.

module M
  extend Sitar

  load 'libsample.so'
end

M.add(1, 2).ret_i # => 3

• List of function return type mthod like ret_XXX.

Method	Return Type in C	Return Type in Ruby	Description
call	void	nil	Not returned value.
ret_i	int	Integer	Returned int value.
ret_s	char *	String	Return string pointer.
ret_ws	wchar_t *	String	Return wide char string pointer.
ret_f	float	Float	Return float value.
ret_d	double	Float	Return double value.

Struct

You can easy to use struct by Sitar::Types::StructFactory.

e.g.

module M
  extend Sitar
  extend Sitar::Types::StructFactory

  # struct Car {
  #   int id;
  #   char name[20];
  # };
  define 'Car', ["int id", "char name[20]"]

  # struct Owner {
  #   int seq;
  #   struct Car cars[3];
  # };
  define 'Owner', ["int seq", "Car cars[3]"]

  define_eval(self)
end

M::CAR.malloc

owner = M::OWNER.malloc
# Car cars[3] is expanded like follow:
# struct Owner {
#   int seq;
#   int id_1;
#   char name_1[20];
#   int id_2;
#   char name_2[20];
#   int id_3;
#   char name_3[20];
# }
owner.id_1
owner.name_1

License

The gem is available as open source under the terms of the MIT License.

Author

slowhand0309