int_ctrl_cmd_is_null
return int_ctrl_cmd_is_null(cdp) ? 0 : cdp->cmd_num;
while (!int_ctrl_cmd_is_null(defn) && (strcmp(defn->cmd_name, s) != 0)) {
if (int_ctrl_cmd_is_null(defn))
while (!int_ctrl_cmd_is_null(defn) && (defn->cmd_num < num)) {
if ((e->cmd_defns == NULL) || int_ctrl_cmd_is_null(e->cmd_defns))