gistfile1

system ~/projects/talkfilters-2.3.8 $ cat talkfilters_ffi.rb 
require 'ffi'

module TalkFilters
  extend FFI::Library

  ffi_lib 'talkfilters'

  attach_function :gtf_filter_pirate, [:string, :pointer, :uint], :int

  def self.pirate(input)
    ptr = FFI::MemoryPointer.new(:pointer, input.size * 2)
    output = gtf_filter_pirate(input, ptr, input.size * 2)
    ptr.read_string
  end
end

p TalkFilters.pirate ARGV[0]

system ~/projects/talkfilters-2.3.8 $ jruby talkfilters_ffi.rb "The quick brown fox jumped over the lazy dog."
"Th' quick brown fox jumped o'er th' lazy dog. Pass the grog!"