inspect

static VALUE
ossl_config_inspect(VALUE self)
{
    VALUE str, ary = ossl_config_get_sections(self);
    const char *cname = rb_class2name(rb_obj_class(self));

    str = rb_str_new2("#<");
    rb_str_cat2(str, cname);
    rb_str_cat2(str, " sections=");
    rb_str_append(str, rb_inspect(ary));
    rb_str_cat2(str, ">");

    return str;
}