Function libxslt::bindings::xmlRegisterOutputCallbacks

pub unsafe extern "C" fn xmlRegisterOutputCallbacks(
    matchFunc: Option<unsafe extern "C" fn(*const i8) -> i32>, 
    openFunc: Option<unsafe extern "C" fn(*const i8) -> *mut c_void>, 
    writeFunc: Option<unsafe extern "C" fn(*mut c_void, *const i8, i32) -> i32>, 
    closeFunc: Option<unsafe extern "C" fn(*mut c_void) -> i32>
) -> i32