class FFI::Bitmask

def from_native(val, ctx)

Returns:
  • (Array) - list of symbol names corresponding to val, plus an optional remainder if some bits don't match any constant

Parameters:
  • ctx () -- unused
  • val (Integer) -- 
def from_native(val, ctx)
  flags = @kv_map.select { |_, v| v & val != 0 }
  list = flags.keys
  # force an unsigned value of the correct size
  val &= (1 << (@native_type.size * 8)) - 1 if @signed
  # If there are unmatch flags,
  # return them in an integer,
  # else information can be lost.
  # Similar to Enum behavior.
  remainder = val ^ flags.values.reduce(0, :|)
  list.push remainder unless remainder == 0
  return list
end