tidyffi.rb

module Tidy
  extend FFI::Library

  ffi_lib "libtidy.dylib"

  attach_function :tidyFileExists, [:string], :int
  attach_function :tidyCreate, [], :pointer
  attach_function :tidyParseString, [:pointer, :string], :int
  attach_function :tidySaveStdout, [:pointer], :int
end

tdoc = Tidy.tidyCreate
Tidy.tidyParseString tdoc, "<title>Foo</title"
Tidy.tidySaveStdout tdoc