REQUIRED_PARAMS
if ((params.mask & REQUIRED_PARAMS) != REQUIRED_PARAMS) {
(params.mask & REQUIRED_PARAMS) ^ REQUIRED_PARAMS);
(params.mask & REQUIRED_PARAMS) ^ REQUIRED_PARAMS);
if (((handle->params.mask & REQUIRED_PARAMS) != REQUIRED_PARAMS) &&
if ((handle->params.mask & REQUIRED_PARAMS) != REQUIRED_PARAMS) {