while (size > 0) {
        result = ffurl_read(nodes[i].uc, buf, size);
        if (result < 0)
            return total ? total : result;
        if (!result) {
            printf("FILE=%s\n", nodes[i].uc->filename);
            if (i + 1 == data->length ||
                ffurl_seek(nodes[++i].uc, 0, SEEK_SET) < 0)
                break;
        }
        total += result;
        buf   += result;
        size  -= result;
    }
    data->current = i;
    return total;