Closes #10

core/dbc_decoder.h

@@ -31,6 +31,14 @@ struct RawCanFrame {
     }
 };
 
+enum class SignalDecodeStatus {
+    InvalidDefinition,
+    InsufficientPayload,
+    SelectorUnavailable,
+    Inactive,
+    Valid
+};
+
 /**
  * @brief One decoded signal value.
  */
@@ -39,6 +47,7 @@ struct DecodedSignalValue {
     RawSignalValue rawValue;        /**< Exact signed or unsigned raw value. */
     double physicalValue;           /**< Converted physical value. */
     bool valid;                     /**< true if decoding succeeded. */
+    SignalDecodeStatus status = SignalDecodeStatus::InvalidDefinition;
 
     /** Lookup using the raw integer; nullptr for invalid or unmapped values. */
     const std::string *GetValueDescription() const {