static int primitiveTypeSize(Class c) {
  if (c == byte.class || c == bool.class) ret 1;
  if (c == short.class || c == char.class) ret 2;
  if (c == int.class || c == float.class) ret 4;
  if (c == long.class || c == double.class) ret 8;
  ret 0;
}