decoder: Add new decoders: ascii, date, time

Change-Id: I392bff2c1f4062aee186875335786fcda9cc0649
Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh>
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

4 files changed, 82 insertions, 2 deletions

diff --git a/low-can-binding/can/can-decoder.cpp b/low-can-binding/can/can-decoder.cpp
index 488fdfb8..15341b1c 100644
--- a/low-can-binding/can/can-decoder.cpp
+++ b/low-can-binding/can/can-decoder.cpp
@@ -195,6 +195,67 @@ openxc_DynamicField decoder_t::decode_bytes(signal_t& signal, std::shared_ptr<me
 	return decoded_value;
 }
 
+
+/// @brief Decode and return string bytes (hex) for a CAN signal's.
+///
+/// This is an implementation of the Signal type signature, and can be
+/// used directly in the signal_t.decoder field.
+///
+/// @param[in] signal  - The details of the signal.
+/// @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.
+///
+/// @return Returns a DynamicField with a string value of bytes (hex)
+///
+openxc_DynamicField decoder_t::decode_ascii(signal_t& signal, std::shared_ptr<message_t> message, bool* send)
+{
+	std::string ret_s = "";
+	openxc_DynamicField openxc_bytes = decode_bytes(signal,message,send);
+	if(!openxc_bytes.has_bytes_value)
+	{
+		AFB_ERROR("Error no bytes value to translate to ascii");
+	}
+	ret_s = converter_t::to_ascii(openxc_bytes.bytes_value,openxc_bytes.length_array);
+	openxc_DynamicField ret = build_DynamicField(ret_s);
+	return ret;
+}
+
+//edit
+openxc_DynamicField decoder_t::decode_date(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;
+}
+
+//edit
+openxc_DynamicField decoder_t::decode_time(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 Wraps a raw CAN signal value in a DynamicField without modification.
 ///
 /// This is an implementation of the Signal type signature, and can be
diff --git a/low-can-binding/can/can-decoder.hpp b/low-can-binding/can/can-decoder.hpp
index 2f7823ad..fd246f3c 100644
--- a/low-can-binding/can/can-decoder.hpp
+++ b/low-can-binding/can/can-decoder.hpp
@@ -32,6 +32,9 @@ public:
 	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 decode_bytes(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_ascii(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_date(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
+	static openxc_DynamicField decode_time(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);
 
diff --git a/low-can-binding/utils/converter.cpp b/low-can-binding/utils/converter.cpp
index c6c2f5e1..56625742 100644
--- a/low-can-binding/utils/converter.cpp
+++ b/low-can-binding/utils/converter.cpp
@@ -22,11 +22,11 @@
 #include <climits>
 
 /**
- * @brief Convert hex data to string
+ * @brief Convert data to hex string
  *
  * @param data An array of data
  * @param length The length of the data
- * @return std::string The string data
+ * @return std::string The hex string
  */
 std::string converter_t::to_hex(const uint8_t data[], const size_t length)
 {
@@ -39,6 +39,21 @@ std::string converter_t::to_hex(const uint8_t data[], const size_t length)
 }
 
 /**
+ * @brief Convert data to ascii string
+ *
+ * @param data An array of data
+ * @param length The length of the data
+ * @return std::string The ascii string
+ */
+std::string converter_t::to_ascii(const uint8_t data[], const size_t length)
+{
+	std::stringstream stream;
+	for(int i = 0; i < length; i++)
+		stream << ((char) data[i]);
+	return stream.str();
+}
+
+/**
  * @brief Translate bit_position and bit_size
  *
  *
diff --git a/low-can-binding/utils/converter.hpp b/low-can-binding/utils/converter.hpp
index 45e29e9a..e8a40f5b 100644
--- a/low-can-binding/utils/converter.hpp
+++ b/low-can-binding/utils/converter.hpp
@@ -23,6 +23,7 @@ class converter_t
 {
 	public:
 		static std::string to_hex(const uint8_t data[], const size_t length);
+		static std::string to_ascii(const uint8_t data[], const size_t length);
 		static void signal_to_bits_bytes(unsigned int bit_position,
 						 unsigned int bit_size,
 						 int &new_start_byte,