to_s

static VALUE
ossl_x509name_to_s(int argc, VALUE *argv, VALUE self)
{
    X509_NAME *name;
    VALUE flag, str;
    BIO *out;
    unsigned long iflag;

    rb_scan_args(argc, argv, "01", &flag);
    if (NIL_P(flag))
        return ossl_x509name_to_s_old(self);
    else iflag = NUM2ULONG(flag);
    if (!(out = BIO_new(BIO_s_mem())))
        ossl_raise(eX509NameError, NULL);
    GetX509Name(self, name);
    if (!X509_NAME_print_ex(out, name, 0, iflag)){
        BIO_free(out);
        ossl_raise(eX509NameError, NULL);
    }
    str = ossl_membio2str(out);

    return str;
}