pub unsafe extern "C" fn sqlite3_exec( arg1: *mut sqlite3, sql: *const c_char, callback: Option<unsafe extern "C" fn(arg1: *mut c_void, arg2: c_int, arg3: *mut *mut c_char, arg4: *mut *mut c_char) -> c_int>, arg2: *mut c_void, errmsg: *mut *mut c_char) -> c_int