int parse_arguments()

in src/parameter.c [380:557]
146 lines of code
59 McCabe index (conditional complexity)

int parse_arguments(struct ntttcp_test *test, int argc, char **argv)
{
	/* long options, for uncommon usage */
	static struct option longopts[] = {
		{"show-tcp-retrans", no_argument, NULL, LO_SHOW_TCP_RETRANS},
		{"show-nic-packets", required_argument, NULL, LO_SHOW_NIC_PACKETS},
		{"show-dev-interrupts", required_argument, NULL, LO_SHOW_DEV_INTERRUPTS},
		{"fq-rate-limit", required_argument, NULL, LO_FQ_RATE_LIMIT},
		{0, 0, 0, 0}
	};
	int opt;

	while ((opt = getopt_long(argc, argv, "r::s::DMLeHm:P:n:l:6up:f::b:B:W:t:C:NO::x::j::QVh", longopts, NULL)) != -1) {
		switch (opt) {
		case 'r':
		case 's':
			if (opt == 'r') {
				test->server_role = true;
			} else {
				test->client_role = true;
			}

			if (optarg) {
				test->bind_address = optarg;
			} else {
				if (optind < argc && NULL != argv[optind] && '\0' != argv[optind][0] && '-' != argv[optind][0])
					test->bind_address = argv[optind++];
			}
			break;

		case 'D':
			test->daemon = true;
			break;

		case 'M':
			test->multi_clients_mode = true;
			break;

		case 'L':
			test->last_client = true;
			break;

		case 'e':
			test->use_epoll = true;
			break;

		case 'H':
			test->exit_after_done = false;
			break;

		case 'm':
			test->mapping = optarg;
			process_mappings(test);
			break;

		case 'P':
			test->server_ports = atoi(optarg);
			break;

		case 'n':
			test->threads_per_server_port = atoi(optarg);
			break;

		case 'l':
			test->conns_per_thread = atoi(optarg);
			break;

		case '6':
			test->domain = AF_INET6;
			break;

		case 'u':
			test->protocol = UDP;
			break;

		case 'p':
			test->server_base_port = atoi(optarg);
			break;

		case 'f':
			if (optarg) {
				test->client_base_port = atoi(optarg);
			} else {
				if (optind < argc && NULL != argv[optind] && '\0' != argv[optind][0] && '-' != argv[optind][0]) {
					test->client_base_port = atoi(argv[optind++]);
				} else {
					test->client_base_port = DEFAULT_BASE_SRC_PORT;
				}
			}
			break;

		case 'b':
			test->recv_buf_size = unit_atod(optarg, BINARY_BASED_UNIT_K);
			test->send_buf_size = unit_atod(optarg, BINARY_BASED_UNIT_K);
			break;

		case 'B':
			test->bandwidth_limit = unit_atod(optarg, DECIMAL_BASED_UNIT_K);
			break;

		case LO_FQ_RATE_LIMIT:
			test->fq_rate_limit = unit_atod(optarg, DECIMAL_BASED_UNIT_K);
			break;

		case 'W':
			test->warmup = atoi(optarg);
			break;

		case 't':
			test->duration = atoi(optarg);
			break;

		case 'C':
			test->cooldown = atoi(optarg);
			break;

		case 'N':
			test->no_synch = true;
			break;

		case LO_SHOW_TCP_RETRANS:
			test->show_tcp_retransmit = true;
			break;

		case LO_SHOW_NIC_PACKETS:
			test->show_interface_packets = optarg;
			break;

		case LO_SHOW_DEV_INTERRUPTS:
			test->show_dev_interrupts = optarg;
			break;

		case 'O':
			test->save_console_log = true;
			if (optarg) {
				test->console_log_filename = optarg;
			} else {
				if (optind < argc && NULL != argv[optind] && '\0' != argv[optind][0] && '-' != argv[optind][0])
					test->console_log_filename = argv[optind++];
			}
			break;

		case 'x':
			test->save_xml_log = true;
			if (optarg) {
				test->xml_log_filename = optarg;
			} else {
				if (optind < argc && NULL != argv[optind] && '\0' != argv[optind][0] && '-' != argv[optind][0])
					test->xml_log_filename = argv[optind++];
			}
			break;

		case 'j':
			test->save_json_log = true;
			if (optarg) {
				test->json_log_filename = optarg;
			} else {
				if (optind < argc && NULL != argv[optind] && '\0' != argv[optind][0] && '-' != argv[optind][0])
					test->json_log_filename = argv[optind++];
			}
			break;

		case 'Q':
			test->quiet = true;
			break;

		case 'V':
			test->verbose = true;
			break;

		case 'h':
		default:
			print_usage();
			exit(ERROR_ARGS);
		}
	}
	return NO_ERROR;
}