parse_gen
uint64_t ret = (uint64_t)parse_gen(arg, a, &err);
uint64_t ret = (uint64_t)parse_gen(arg, a, &err);
scale = parse_gen(av[ac-1], NULL, &err);
plr = parse_gen(av[ac-1], NULL, &err);
ber = parse_gen(av[ac-1], NULL, &err);