Change data_ member of can_message_t object

to a vector of uint8_t instead of an array

This is more flexible to allocate dynamically
the vector depending if we process classic CAN
frame or CAN FD frame which are 64bytes long.

Change-Id: I698002139d612e3aaaa33f0f5a895e16ff655f5d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

2 files changed, 11 insertions, 8 deletions

diff --git a/src/can-message.cpp b/src/can-message.cpp
index 77fce68..a95722e 100644
--- a/src/can-message.cpp
+++ b/src/can-message.cpp
@@ -55,8 +55,9 @@ uint8_t can_message_t::get_flags() const
 
 const uint8_t* can_message_t::get_data() const
 {
-	return data_;
+	return data_.data();
 }
+
 uint8_t can_message_t::get_length() const
 {
 	return length_;
@@ -149,15 +150,15 @@ void can_message_t::set_length(const uint8_t new_length)
 
 void can_message_t::set_data(const __u8 new_data[], size_t dlen)
 {
-	if (sizeof(dlen)/sizeof(__u8) > maxdlen_)
+	if (dlen > maxdlen_)
 		ERROR(binder_interface, "Can set data, too big ! It is a CAN frame ?");
 	else
 	{
 		int i;
-		/* Limiting to 8 bytes message for now on 64 bytes from fd frames*/
+		/* Limiting to 8 bytes message for now, even on 64 bytes from fd frames*/
 		for(i=0;i<CAN_MESSAGE_SIZE;i++)
 		{
-			data_[i] = new_data[i];
+			data_.push_back(new_data[i]);
 		}
 	}
 }
@@ -181,8 +182,8 @@ void can_message_t::convert_from_canfd_frame(const struct canfd_frame& frame)
 	if(maxdlen_ == CANFD_MAX_DLEN)
 		set_flags(frame.flags);
 
-	size_t dlen = sizeof(frame.data);
-	memset(data_, 0, dlen);
+	size_t dlen = sizeof(frame.data)/sizeof(__u8);
+	data_.reserve(dlen);
 	set_data(frame.data, dlen);
 
 	DEBUG(binder_interface, "convert_from_canfd_frame: Found id: %d, format: %d, length: %d, data %d%d%d%d%d%d%d%d", id_, format_, length_,
diff --git a/src/can-message.hpp b/src/can-message.hpp
index f24c170..82e2e01 100644
--- a/src/can-message.hpp
+++ b/src/can-message.hpp
@@ -17,6 +17,7 @@
 
 #pragma once
 
+#include <vector>
 #include <string>
 #include <cstdint>
 #include <linux/can.h>
@@ -61,7 +62,7 @@ class can_message_t {
 		uint8_t length_; /*!<  uint8_t length - the length of the data array (max 8). */
 		uint8_t flags_; /*!< unint8_t flags of a CAN FD frame. Needed if we catch FD frames.*/
 		CanMessageFormat format_; /*!< CanMessageFormat format - the format of the message's ID.*/
-		uint8_t data_[CAN_MESSAGE_SIZE]; /*!< uint8_t data  - The message's data field with a size of 8 which is the standard about CAN bus messages.*/
+		std::vector<uint8_t> data_; /*!< uint8_t data  - The message's data field with a size of 8 which is the standard about CAN bus messages.*/
 
 		uint8_t maxdlen_;
 
@@ -104,7 +105,8 @@ class can_message_t {
 		/**
 		 * @brief Retrieve data_ member value.
 		 *
-		 * @return uint8_t data_ pointer class member
+		 * @return uint8_t data_ pointer to the first element 
+		 *  of class member data_
 		 */
 		const uint8_t* get_data() const;