Function sqlite3_sys::sqlite3_create_function

pub unsafe extern "C" fn sqlite3_create_function(
    p: *mut sqlite3,
    p: *const c_char,
    n: c_int,
    n: c_int,
    p: *mut c_void,
    f: Option<sqlite3_create_function_callback1>,
    f: Option<sqlite3_create_function_callback1>,
    f: Option<sqlite3_create_function_callback2>
) -> c_int