pub unsafe extern "C" fn ffxypx( xpos: f64, ypos: f64, xref: f64, yref: f64, xrefpix: f64, yrefpix: f64, xinc: f64, yinc: f64, rot: f64, type_: *mut c_char, xpix: *mut f64, ypix: *mut f64, status: *mut c_int) -> c_int