libcamera: controls: Add operator== and operator!= to ControlRange

Allow comparision of control ranges by adding the required operators.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

include/libcamera/controls.h

@@ -112,6 +112,16 @@ public:
 
 	std::string toString() const;
 
+	bool operator==(const ControlRange &other) const
+	{
+		return min_ == other.min_ && max_ == other.max_;
+	}
+
+	bool operator!=(const ControlRange &other) const
+	{
+		return !(*this == other);
+	}
+
 private:
 	ControlValue min_;
 	ControlValue max_;

src/libcamera/controls.cpp

@@ -383,6 +383,18 @@ std::string ControlRange::toString() const
 	return ss.str();
 }
 
+/**
+ * \fn bool ControlRange::operator==()
+ * \brief Compare ControlRange instances for equality
+ * \return True if the ranges have identical min and max, false otherwise
+ */
+
+/**
+ * \fn bool ControlRange::operator!=()
+ * \brief Compare ControlRange instances for non equality
+ * \return False if the ranges have identical min and max, true otherwise
+ */
+
 /**
  * \typedef ControlIdMap
  * \brief A map of numerical control ID to ControlId