Testing variadic Fiddle version 1.0.1

variadic.rb

require 'fiddle'
include Fiddle

# Fiddle v:1.0.1

setlocale = Function.new(
  Handle['setlocale'],
  [
    :int,
    :const_string
  ],
  :voidp
)

setlocale.(4, '')

strfmon = Function.new(
  Handle['strfmon'],
  [
    :voidp,
    :size_t,
    :const_string,
    :variadic
  ],
  :ssize_t
)

buf = Pointer.malloc(100)

strfmon.(
  buf,
  buf.size,
  '%n :: %i',
  :double,
  42.1337,
  :double,
  42.1337
)

p buf.to_s.force_encoding('utf-8')
free buf

__END__
"£42.13 :: GBP42.13"