From: Sean O'Halpin <sean.ohalpin@...>
Date: 2008-11-04T23:46:24+09:00
Subject: Re: [ANN] FFI 0.1.1 (Foreign Function Interface) for Ruby 1.8.6/7 and 1.9

On Tue, Nov 4, 2008 at 2:38 PM, Ken Bloom <kbloom@gmail.com> wrote:
>
> Based on all of the examples I've seen, there's something that's still
> not clear to me. How does ruby-ffi know which library to load to find the
> specified function?
>
> --Ken
>
Use ffi_lib in the extended module, e.g.

require 'rubygems'
require 'ffi'

module NCursesFFI
 extend FFI::Library
 ffi_lib 'ncurses'
 attach_function 'clear', [], :int
 attach_function 'endwin', [], :int
 attach_function 'getch', [], :int
 attach_function 'initscr', [], :int
 attach_function 'printw', [ :string ], :int
 attach_function 'refresh', [], :int
end

NCursesFFI.initscr
NCursesFFI.printw("Hello again")
NCursesFFI.refresh
NCursesFFI.getch
NCursesFFI.endwin

Regards,
Sean