Function findOption

popt/popt.c:552–613

}

static const struct poptOption *
findOption(const struct poptOption * opt,
		const char * longName, size_t longNameLen,
		char shortName,
		poptCallbackType * callback,
		const void ** callbackData,
		unsigned int argInfo)
{
    const struct poptOption * cb = NULL;
    poptArg cbarg = { .ptr = NULL };

    /* This happens when a single - is given */
    if (LF_ISSET(ONEDASH) && !shortName && (longName && *longName == '\0'))
	shortName = '-';

    for (; opt->longName || opt->shortName || opt->arg; opt++) {
	poptArg arg = { .ptr = opt->arg };

	switch (poptArgType(opt)) {
	case POPT_ARG_INCLUDE_TABLE:	/* Recurse on included sub-tables. */
	{   const struct poptOption * opt2;

	    poptSubstituteHelpI18N(arg.opt);	/* XXX side effects */
	    if (arg.ptr == NULL) continue;	/* XXX program error */
	    opt2 = findOption(arg.opt, longName, longNameLen, shortName, callback,
			      callbackData, argInfo);
	    if (opt2 == NULL) continue;
	    /* Sub-table data will be inheirited if no data yet. */
	    if (callback && *callback
	     && callbackData && *callbackData == NULL)
		*callbackData = opt->descrip;
	    return opt2;
	}   break;
	case POPT_ARG_CALLBACK:
	    cb = opt;
	    cbarg.ptr = opt->arg;
	    continue;
	    break;
	default:
	    break;
	}

	if (longName != NULL && opt->longName != NULL &&
		   (!LF_ISSET(ONEDASH) || F_ISSET(opt, ONEDASH)) &&
		   longOptionStrcmp(opt, longName, longNameLen))
	{
	    break;
	} else if (shortName && shortName == opt->shortName) {
	    break;
	}
    }

    if (opt->longName == NULL && !opt->shortName)
	return NULL;

    if (callback)
	*callback = (cb ? cbarg.cb : NULL);
    if (callbackData)