a-rubyist-rusting-part-4-8.rs

require 'ffi'

module Scrape
  extend FFI::Library
  ffi_lib './target/debug/libscrape.dylib'

  class FromRustArray < FFI::Struct
    layout :len,    :size_t, # dynamic array layout
           :data,   :pointer #

    def to_a
      self[:data].get_array_of_string(0, self[:len]).compact
    end
  end

  attach_function :number_to_char_array, [], FromRustArray.by_value
end

p Scrape.number_to_char_array.to_a