taken over changes from master

serialize/SerializeAdapter.h

@@ -1,47 +1,92 @@
-#ifndef FSFW_SERIALIZE_SERIALIZEADAPTER_H_
-#define FSFW_SERIALIZE_SERIALIZEADAPTER_H_
+#ifndef _FSFW_SERIALIZE_SERIALIZEADAPTER_H_
+#define _FSFW_SERIALIZE_SERIALIZEADAPTER_H_
 
+#include "../returnvalues/HasReturnvaluesIF.h"
 #include "EndianConverter.h"
 #include "SerializeIF.h"
+#include <cstddef>
+#include <type_traits>
 
-#include "../container/IsDerivedFrom.h"
-#include "../returnvalues/HasReturnvaluesIF.h"
-#include <cstring>
-
- /**
- * @brief These adapters provides an interface to use the SerializeIF functions
- * 		  with arbitrary template objects to facilitate and simplify the
- * 		  serialization of classes with different multiple different data types
- * 		  into buffers and vice-versa.
- * @details
- * The correct serialization or deserialization function is chosen at
- * compile time with template type deduction.
- *
- * @ingroup serialize
+/**
+ * \ingroup serialize
  */
+
 class SerializeAdapter {
 public:
+	/***
+	 * This function can be used to serialize a trivial copy-able type or a child of SerializeIF.
+	 * The right template to be called is determined in the function itself.
+	 * For objects of non trivial copy-able type this function is almost never called by the user directly.
+	 * Instead helpers for specific types like SerialArrayListAdapter or SerialLinkedListAdapter is the right choice here.
+	 *
+	 * @param[in] object Object to serialize, the used type is deduced from this pointer
+	 * @param[in/out] buffer Buffer to serialize into. Will be moved by the function.
+	 * @param[in/out] size Size of current written buffer. Will be incremented by the function.
+	 * @param[in] maxSize Max size of Buffer
+	 * @param[in] streamEndianness Endianness of serialized element as in according to SerializeIF::Endianness
+	 * @return
+	 * 		- @c BUFFER_TOO_SHORT The given buffer in is too short
+	 * 		- @c RETURN_FAILED Generic Error
+	 * 		- @c RETURN_OK Successful serialization
+	 */
 	template<typename T>
 	static ReturnValue_t serialize(const T *object, uint8_t **buffer,
-			size_t *size, size_t maxSize, SerializeIF::Endianness streamEndianness) {
-		InternalSerializeAdapter<T, IsDerivedFrom<T, SerializeIF>::Is> adapter;
+			size_t *size, size_t maxSize,
+			SerializeIF::Endianness streamEndianness) {
+		InternalSerializeAdapter<T, std::is_base_of<SerializeIF, T>::value> adapter;
 		return adapter.serialize(object, buffer, size, maxSize,
 				streamEndianness);
 	}
+	/**
+	 * Function to return the serialized size of the object in the pointer.
+	 * May be a trivially copy-able object or a Child of SerializeIF
+	 *
+	 * @param object Pointer to Object
+	 * @return Serialized size of object
+	 */
 	template<typename T>
-	static uint32_t getSerializedSize(const T *object) {
-		InternalSerializeAdapter<T, IsDerivedFrom<T, SerializeIF>::Is> adapter;
+	static size_t getSerializedSize(const T *object){
+		InternalSerializeAdapter<T, std::is_base_of<SerializeIF, T>::value> adapter;
 		return adapter.getSerializedSize(object);
 	}
+	/**
+	 * @brief
+	 * Deserializes a object from a given buffer of given size.
+	 * Object Must be trivially copy-able or a child of SerializeIF.
+	 *
+	 * @details
+	 * Buffer will be moved to the current read location. Size will be decreased by the function.
+	 *
+	 * @param[in/out] buffer Buffer to deSerialize from. Will be moved by the function.
+	 * @param[in/out] size Remaining size of the buffer to read from. Will be decreased by function.
+	 * @param[in] streamEndianness Endianness as in according to SerializeIF::Endianness
+	 * @return
+	 * 	- @c STREAM_TOO_SHORT The input stream is too short to deSerialize the object
+	 * 	- @c TOO_MANY_ELEMENTS The buffer has more inputs than expected
+	 * 	- @c RETURN_FAILED Generic Error
+	 * 	- @c RETURN_OK Successful deserialization
+	 */
 	template<typename T>
 	static ReturnValue_t deSerialize(T *object, const uint8_t **buffer,
 			size_t *size, SerializeIF::Endianness streamEndianness) {
-		InternalSerializeAdapter<T, IsDerivedFrom<T, SerializeIF>::Is> adapter;
+		InternalSerializeAdapter<T, std::is_base_of<SerializeIF, T>::value> adapter;
 		return adapter.deSerialize(object, buffer, size, streamEndianness);
 	}
 private:
-	template<typename T, int>
-	class InternalSerializeAdapter {
+	/**
+	 * Internal template to deduce the right function calls at compile time
+	 */
+	template<typename T, bool> class InternalSerializeAdapter;
+
+	/**
+	 * Template to be used if T is not a child of SerializeIF
+	 *
+	 * @tparam T T must be trivially_copyable
+	 */
+	template<typename T>
+	class InternalSerializeAdapter<T, false> {
+		static_assert (std::is_trivially_copyable<T>::value,
+				"If a type needs to be serialized it must be a child of SerializeIF or trivially copy-able");
 	public:
 		static ReturnValue_t serialize(const T *object, uint8_t **buffer,
 				size_t *size, size_t max_size,
@@ -50,8 +95,9 @@ private:
 			if (size == nullptr) {
 				size = &ignoredSize;
 			}
-			//TODO check integer overflow of *size
-			if (sizeof(T) + *size <= max_size) {
+			//Check remaining size is large enough and check integer overflow of *size
+			size_t newSize = sizeof(T) + *size;
+			if ((newSize <= max_size) and (newSize > *size)) {
 				T tmp;
 				switch (streamEndianness) {
 				case SerializeIF::Endianness::BIG:
@@ -65,7 +111,7 @@ private:
 					tmp = *object;
 					break;
 				}
-				std::memcpy(*buffer, &tmp, sizeof(T));
+				memcpy(*buffer, &tmp, sizeof(T));
 				*size += sizeof(T);
 				(*buffer) += sizeof(T);
 				return HasReturnvaluesIF::RETURN_OK;
@@ -79,7 +125,7 @@ private:
 			T tmp;
 			if (*size >= sizeof(T)) {
 				*size -= sizeof(T);
-				std::memcpy(&tmp, *buffer, sizeof(T));
+				memcpy(&tmp, *buffer, sizeof(T));
 				switch (streamEndianness) {
 				case SerializeIF::Endianness::BIG:
 					*object = EndianConverter::convertBigEndian<T>(tmp);
@@ -103,14 +149,18 @@ private:
 		uint32_t getSerializedSize(const T *object) {
 			return sizeof(T);
 		}
-
 	};
 
+	/**
+	 * Template for objects that inherit from SerializeIF
+	 *
+	 * @tparam T A child of SerializeIF
+	 */
 	template<typename T>
-	class InternalSerializeAdapter<T, 1> {
+	class InternalSerializeAdapter<T, true> {
 	public:
-		ReturnValue_t serialize(const T *object, uint8_t **buffer,
-				size_t *size, size_t max_size,
+		ReturnValue_t serialize(const T *object, uint8_t **buffer, size_t *size,
+				size_t max_size,
 				SerializeIF::Endianness streamEndianness) const {
 			size_t ignoredSize = 0;
 			if (size == nullptr) {
@@ -118,7 +168,7 @@ private:
 			}
 			return object->serialize(buffer, size, max_size, streamEndianness);
 		}
-		uint32_t getSerializedSize(const T *object) const {
+		size_t getSerializedSize(const T *object) const {
 			return object->getSerializedSize();
 		}
 
@@ -129,4 +179,4 @@ private:
 	};
 };
 
-#endif /* SERIALIZEADAPTER_H_ */
+#endif /* _FSFW_SERIALIZE_SERIALIZEADAPTER_H_ */