Device/Disk: Add VSA read and parse functionality

Implement ability to extract network traffic (CAN, LIN, Ethernet, etc.) from VSA message records on disk. Add a method to Device class that uses the VSAParser and the individual record types to extract messages from the VSA message records and pass them back to the communication system. This routes messages such that it appears as if they were discovered live instead of read from disk. The parse process (in Device) requires determination of metadata about the VSA file system on a device before it can begin extracting messages. This currently only handles data captured from the current coremini script on a device.

include/icsneo/disk/vsa/vsa02.h

@@ -0,0 +1,55 @@
+#ifndef __VSA02_H__
+#define __VSA02_H__
+
+#ifdef __cplusplus
+
+#include "icsneo/disk/vsa/vsa.h"
+
+namespace icsneo {
+
+/**
+ * Class that contains data for Logdata records
+ */
+class VSA02 : public VSA {
+public:
+	/**
+	 * Constructor that parses the given bytestream
+	 *
+	 * @param bytes Bystream that contains data for Logdata VSA records
+	 */
+	VSA02(uint8_t* const bytes);
+
+	/**
+	 * Get the timestamp for this record in 25 nanosecond ticks since January 1, 2007
+	 *
+	 * @return The timestamp for this record in 25 nanosecond ticks since January 1, 2007
+	 */
+	uint64_t getTimestamp() override { return timestamp; }
+
+private:
+	/**
+	 * Perform the checksum for this record
+	 *
+	 * @param bytes Bystream to test against the checksum
+	 */
+	void doChecksum(uint8_t* bytes) override;
+
+	uint16_t constantIndex; // Index into CoreMini binary where constant data for this record can be found
+	struct Flags {
+		bool hasMoreData : 1; // Set to true if there are further Logdata records expected to terminate this "chain"
+		uint8_t numSamples : 3; // Number of valid samples in samples
+		bool isAscii : 1; // Set to true if the processing code should treat samples as an ASCII string
+		bool prefixTime : 1; // Set to true if the function block step that created this record requested that the timestamp be prepended on the output
+		bool sample0IsHex : 1; // Set to true if the value in sample 0 should be written as hex
+		bool sample1IsHex : 1; // Set to true if the value in sample 1 shoudl be written as hex
+	} flags; // Series of flags for this record
+	uint8_t pieceCount; // Value of the rolling counter for this "chain" of logdata records
+	uint64_t timestamp; // Timestamp in 25 nanosecond ticks since January 1, 2007
+	std::vector<uint8_t> samples; // Data for this record that varies based on the above flags. Either 2 32.32 fixed point values or 16 byte ASCII string
+	uint16_t checksum; // The sum of the previous 15 words
+};
+
+} // namespace icsneo
+
+#endif // __cplusplus
+#endif // __VSA02_H__