class Protobuf::Field::Sfixed32Field

def decode(bytes)
  value  = bytes.unpack('V').first
  value -= 0x1_0000_0000 if (value & 0x8000_0000).nonzero?
  value
end

def encode(value)
  [value].pack('V')
end

def wire_type
  ::Protobuf::WireType::FIXED32
end