Function parse_options

fftools/cmdutils.c:420–454

}

int parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
                  int (*parse_arg_function)(void *, const char*))
{
    const char *opt;
    int optindex, handleoptions = 1, ret;

    /* perform system-dependent conversions for arguments list */
    prepare_app_arguments(&argc, &argv);

    /* parse options */
    optindex = 1;
    while (optindex < argc) {
        opt = argv[optindex++];

        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
            if (opt[1] == '-' && opt[2] == '\0') {
                handleoptions = 0;
                continue;
            }
            opt++;

            if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
                return ret;
            optindex += ret;
        } else {
            if (parse_arg_function) {
                ret = parse_arg_function(optctx, opt);
                if (ret < 0)
                    return ret;
            }
        }
    }

    return 0;
}

int parse_optgroup(void *optctx, OptionGroup *g, const OptionDef *defs)
{