error_t Options::parse_arg()

in src/options.cc [119:160]

• 29 lines of code
• 12 McCabe index (conditional complexity)

	error_t Options::parse_arg(int key, char *arg) {

		// if it's in the map of expected options
		if (opt_map.count(key)) {

			// get the option from the opt_map
			DiskspdOption& option = opt_map[key];

			// check for duplicate args
			if (opts.count(option.type)) {
				fprintf(stderr, "Option -%c already specified!\n", (char)key);
				return EINVAL;
			}
			// add to map of parsed options
			opts[option.type] = key;

			// get argument and validate it
			if (arg) {
				option.arg = std::string(arg);

				if ((option.flags & OPT_NUMERIC) && !is_numeric(arg)) {
					fprintf(stderr, "Argument to option -%c was invalid!\n", (char)key);
					return EINVAL;
				} else if ((option.flags & OPT_BYTE_SIZE) && !valid_byte_size(arg)) {
					fprintf(stderr, "Argument to option -%c was invalid!\n", (char)key);
					return EINVAL;
				} else if ((option.flags & OPT_NON_ZERO) &&
						(arg[0] == '0' && (arg[1] < '1' || arg[1] > '9'))) {
					fprintf(stderr, "Argument to option -%c was invalid!\n", (char)key);
					return EINVAL;
				} // else do nothing - it will have to be validated by profile.cc
			}

		} else if (key == ARGP_KEY_ARG) {
			// otherwise it's a non-option (a target for diskspd), so push it to the vector
			non_opts.push_back(std::string(arg));

		} else {
			return ARGP_ERR_UNKNOWN;
		}
		return 0;
	}