+ return _structure->encoding->is_digits_decimal;
+}
+
+shared_ptr<Rational> Analog::scale()
+{
+ unique_ptr<Rational> scale;
+ scale.reset(new Rational(&(_structure->encoding->scale)));
+
+ if (scale)
+ return scale->share_owned_by(shared_from_this());
+ else
+ throw Error(SR_ERR_NA);
+}
+
+shared_ptr<Rational> Analog::offset()
+{
+ unique_ptr<Rational> offset;
+ offset.reset(new Rational(&(_structure->encoding->offset)));
+
+ if (offset)
+ return offset->share_owned_by(shared_from_this());
+ else
+ throw Error(SR_ERR_NA);
+}
+
+const Quantity *Analog::mq() const
+{
+ return Quantity::get(_structure->meaning->mq);
+}
+
+const Unit *Analog::unit() const
+{
+ return Unit::get(_structure->meaning->unit);
+}
+
+vector<const QuantityFlag *> Analog::mq_flags() const
+{
+ return QuantityFlag::flags_from_mask(_structure->meaning->mqflags);
+}
+
+Rational::Rational(const struct sr_rational *structure) :
+ _structure(structure)
+{
+}
+
+Rational::~Rational()
+{
+}
+
+shared_ptr<Rational> Rational::share_owned_by(shared_ptr<Analog> _parent)
+{
+ return static_pointer_cast<Rational>(
+ ParentOwned::share_owned_by(_parent));
+}
+
+int64_t Rational::numerator() const
+{
+ return _structure->p;
+}
+
+uint64_t Rational::denominator() const
+{
+ return _structure->q;
+}
+
+float Rational::value() const
+{
+ return (float)(_structure->p) / (float)(_structure->q);