Byte Array to Integer Type

gistfile1.cpp

enum ByteOrder {
	BIG_ENDIAN,
	LITTLE_ENDIAN
};

enum BTIException {
	INTEGER_WIDTH_OUT_OF_BOUNDS
};

template <typename IntType>
IntType BytesToInteger(const unsigned char* Bytes, const unsigned int& Length, 
	ByteOrder Endian = LITTLE_ENDIAN) throw (BTIException) {
	const int IntegerWidth = sizeof(IntType);
	if (Length < IntegerWidth)
		throw INTEGER_WIDTH_OUT_OF_BOUNDS;
	switch (Endian) {
		case LITTLE_ENDIAN:
			return *static_cast<IntType *>(Bytes);
		case BIG_ENDIAN:
			IntType result = 0;
			for (unsigned int index = 0; index < IntegerWidth; index++)
				result = (result << 8) + Bytes[index];
			return result;
	}
}