Change signature of decoders

This commit changes the signature of decoders. It is
now necessary to specify the version of the signals
so that the low-can-generator generates the associated
wrapper and not need to modify the decoder already
developed.

Bug-AGL : SPEC-2780

Change-Id: I044b1a3a6bacb9fc59bd6d3f77a1dbc437a3aa86
Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh>

3 files changed, 54 insertions, 53 deletions

diff --git a/low-can-binding/can/can-decoder.cpp b/low-can-binding/can/can-decoder.cpp
index 3c811be6..7d6ae2a1 100644
--- a/low-can-binding/can/can-decoder.cpp
+++ b/low-can-binding/can/can-decoder.cpp
@@ -27,7 +27,7 @@
 /// value.
 ///
 /// @param[in] signal - The signal to be parsed from the data.
-/// @param[in] message - can_message_t to parse
+/// @param[in] message - message_t to parse
 ///
 /// @return Returns the raw value of the signal parsed as a bitfield from the given byte
 /// array.
@@ -94,7 +94,7 @@ float decoder_t::parse_signal_bitfield(signal_t& signal, std::shared_ptr<message
 /// used directly in the signal_t.decoder field.
 ///
 /// @param[in] signal - The details of the signal that contains the state mapping.
-/// @param[in] value - The numerical value that will be wrapped in a DynamicField.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output argument that will be set to false if the value should
 ///     not be sent for any reason.
 ///
@@ -102,10 +102,19 @@ float decoder_t::parse_signal_bitfield(signal_t& signal, std::shared_ptr<message
 /// its numeric value. The 'send' argument will not be modified as this decoder
 /// always succeeds.
 ///
-openxc_DynamicField decoder_t::decode_noop(signal_t& signal, float value, bool* send)
+openxc_DynamicField decoder_t::decode_noop(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
+	float value = decoder_t::parse_signal_bitfield(signal, message);
+	AFB_DEBUG("Decoded message from parse_signal_bitfield: %f", value);
 	openxc_DynamicField decoded_value = build_DynamicField(value);
 
+	// Don't send if they is no changes
+	if ((signal.get_last_value() == value && !signal.get_send_same()) || !*send )
+	{
+		*send = false;
+	}
+	signal.set_last_value(value);
+
 	return decoded_value;
 }
 /// @brief Coerces a numerical value to a boolean.
@@ -114,7 +123,7 @@ openxc_DynamicField decoder_t::decode_noop(signal_t& signal, float value, bool*
 /// used directly in the signal_t.decoder field.
 ///
 /// @param[in] signal  - The details of the signal that contains the state mapping.
-/// @param[in] value - The numerical value that will be converted to a boolean.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output argument that will be set to false if the value should
 ///     not be sent for any reason.
 ///
@@ -122,10 +131,20 @@ openxc_DynamicField decoder_t::decode_noop(signal_t& signal, float value, bool*
 /// is 0.0, otherwise true. The 'send' argument will not be modified as this
 /// decoder always succeeds.
 ///
-openxc_DynamicField decoder_t::decode_boolean(signal_t& signal, float value, bool* send)
+openxc_DynamicField decoder_t::decode_boolean(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
+	float value = decoder_t::parse_signal_bitfield(signal, message);
+	AFB_DEBUG("Decoded message from parse_signal_bitfield: %f", value);
 	openxc_DynamicField decoded_value = build_DynamicField(value == 0.0 ? false : true);
 
+	// Don't send if they is no changes
+	if ((signal.get_last_value() == value && !signal.get_send_same()) || !*send )
+	{
+		*send = false;
+	}
+	signal.set_last_value(value);
+
+
 	return decoded_value;
 }
 /// @brief Update the metadata for a signal and the newly received value.
@@ -136,17 +155,19 @@ openxc_DynamicField decoder_t::decode_boolean(signal_t& signal, float value, boo
 /// This function always flips 'send' to false.
 ///
 /// @param[in] signal  - The details of the signal that contains the state mapping.
-/// @param[in] value - The numerical value that will be converted to a boolean.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - This output argument will always be set to false, so the caller will
 ///      know not to publish this value to the pipeline.
 ///
 /// @return Return value is undefined.
 ///
-openxc_DynamicField decoder_t::decode_ignore(signal_t& signal, float value, bool* send)
+openxc_DynamicField decoder_t::decode_ignore(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
+	float value = decoder_t::parse_signal_bitfield(signal, message);
 	if(send)
 	  *send = false;
 
+	signal.set_last_value(value);
 	openxc_DynamicField decoded_value;
 
 	return decoded_value;
@@ -159,7 +180,7 @@ openxc_DynamicField decoder_t::decode_ignore(signal_t& signal, float value, bool
 /// used directly in the signal_t.decoder field.
 ///
 /// @param[in] signal  - The details of the signal that contains the state mapping.
-/// @param[in] value - The numerical value that should map to a state.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output argument that will be set to false if the value should
 ///     not be sent for any reason.
 ///
@@ -167,8 +188,10 @@ openxc_DynamicField decoder_t::decode_ignore(signal_t& signal, float value, bool
 /// the signal. If an equivalent isn't found, send is sent to false and the
 /// return value is undefined.
 ///
-openxc_DynamicField decoder_t::decode_state(signal_t& signal, float value, bool* send)
+openxc_DynamicField decoder_t::decode_state(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
+	float value = decoder_t::parse_signal_bitfield(signal, message);
+	AFB_DEBUG("Decoded message from parse_signal_bitfield: %f", value);
 	const std::string signal_state = signal.get_states((uint8_t)value);
 	openxc_DynamicField decoded_value = build_DynamicField(signal_state);
 	if(signal_state.size() <= 0)
@@ -176,6 +199,15 @@ openxc_DynamicField decoder_t::decode_state(signal_t& signal, float value, bool*
 		*send = false;
 		AFB_ERROR("No state found with index: %d", (int)value);
 	}
+
+	// Don't send if they is no changes
+	if ((signal.get_last_value() == value && !signal.get_send_same()) || !*send )
+	{
+		*send = false;
+	}
+	signal.set_last_value(value);
+
+
 	return decoded_value;
 }
 
@@ -187,7 +219,7 @@ openxc_DynamicField decoder_t::decode_state(signal_t& signal, float value, bool*
 /// will be passed to the decoder before publishing.
 ///
 /// @param[in] signal - The details of the signal to decode and forward.
-/// @param[in] message - The received CAN message that should contain this signal.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output parameter that will be flipped to false if the value could
 ///      not be decoded.
 ///
@@ -196,22 +228,13 @@ openxc_DynamicField decoder_t::decode_state(signal_t& signal, float value, bool*
 ///
 openxc_DynamicField decoder_t::translate_signal(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
-	float value = decoder_t::parse_signal_bitfield(signal, message);
-	AFB_DEBUG("Decoded message from parse_signal_bitfield: %f", value);
 
 	// Must call the decoders every time, regardless of if we are going to
 	// decide to send the signal or not.
 	openxc_DynamicField decoded_value = decoder_t::decode_signal(signal,
-			value, send);
+			message, send);
 
 	signal.set_received(true);
-
-	// Don't send if they is no changes
-	if ((signal.get_last_value() == value && !signal.get_send_same()) || !*send )
-	{
-		*send = false;
-	}
-	signal.set_last_value(value);
 	signal.set_timestamp(message->get_timestamp());
 	signal.get_message()->set_last_value(message);
 	return decoded_value;
@@ -224,41 +247,23 @@ openxc_DynamicField decoder_t::translate_signal(signal_t& signal, std::shared_pt
 /// will be passed to the decoder before returning.
 ///
 /// @param[in] signal - The details of the signal to decode and forward.
-/// @param[in] value - The numerical value that will be converted to a boolean.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output parameter that will be flipped to false if the value could
 ///      not be decoded.
 ///
 /// @return The decoder returns an openxc_DynamicField, which may contain a number,
 /// string or boolean. If 'send' is false, the return value is undefined.
 ///
-openxc_DynamicField decoder_t::decode_signal( signal_t& signal, float value, bool* send)
+openxc_DynamicField decoder_t::decode_signal( signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
 	signal_decoder decoder = signal.get_decoder() == nullptr ?
 							decode_noop : signal.get_decoder();
+
 	openxc_DynamicField decoded_value = decoder(signal,
-			value, send);
+			message, send);
 	return decoded_value;
 }
 
-/// @brief Decode a transformed, human readable value from an raw CAN signal
-/// already parsed from a CAN message.
-///
-/// This is the same as decode_signal but you must parse the bitfield value of the signal from the CAN
-/// message yourself. This is useful if you need that raw value for something
-/// else.
-///
-/// @param[in] signal - The details of the signal to decode and forward.
-/// @param[in] message - Raw CAN message to decode
-/// @param[out] send - An output parameter that will be flipped to false if the value could
-///      not be decoded.
-///
-openxc_DynamicField decoder_t::decode_signal( signal_t& signal, std::shared_ptr<message_t> message, bool* send)
-{
-	float value = parse_signal_bitfield(signal, message);
-	return decode_signal(signal, value, send);
-}
-
-
 ///
 /// @brief Decode the payload of an OBD-II PID.
 ///
diff --git a/low-can-binding/can/can-decoder.hpp b/low-can-binding/can/can-decoder.hpp
index ac9eb5d9..78de8ee1 100644
--- a/low-can-binding/can/can-decoder.hpp
+++ b/low-can-binding/can/can-decoder.hpp
@@ -26,16 +26,14 @@ class decoder_t
 public:
 	static float parse_signal_bitfield(signal_t& signal, std::shared_ptr<message_t> message);
 
-	static openxc_DynamicField decode_state(signal_t& signal, float value, bool* send);
-	static openxc_DynamicField decode_boolean(signal_t& signal, float value, bool* send);
-	static openxc_DynamicField decode_ignore(signal_t& signal, float value, bool* send);
-	static openxc_DynamicField decode_noop(signal_t& signal, float value, bool* send);
+	static openxc_DynamicField decode_state(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_boolean(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_ignore(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_noop(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
 
 	static openxc_DynamicField translate_signal(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
 
 	static openxc_DynamicField decode_signal(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
 
-	static openxc_DynamicField decode_signal(signal_t& signal, float value, bool* send);
-
 	static float decode_obd2_response(const DiagnosticResponse* response, float parsed_payload);
-};
+};
\ No newline at end of file
diff --git a/low-can-binding/can/signals.hpp b/low-can-binding/can/signals.hpp
index e723100e..2fcc27ed 100644
--- a/low-can-binding/can/signals.hpp
+++ b/low-can-binding/can/signals.hpp
@@ -38,15 +38,13 @@ class signal_t;
 /// string or boolean.
 ///
 /// @param[in] signal - The CAN signal that we are decoding.
-/// @param[in] signalCount - The length of the signals array.
-/// @param[in] value - The CAN signal parsed from the message as a raw floating point
-///	value.
+/// @param[in] message - The message with data to decode.
 /// @param[out] send - An output parameter. If decoding fails or CAN signal is
 ///	not sending, this should be flipped to false.
 ///
 /// @return a decoded value in an openxc_DynamicField struct.
 ///
-typedef openxc_DynamicField (*signal_decoder)(signal_t& signal, float value, bool* send);
+typedef openxc_DynamicField (*signal_decoder)(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
 
 ///
 /// @brief: The type signature for a CAN signal encoder.