Circular Bidirectional Filereader Buffer

This class allows to sequentially read data elements from a file forwards and backwards. While you read data elements with getNext and getPrev, a background task ensures that a certain number (a fourth of CHACHE_LEN in both directions) of data elements is loaded into the RAM buffer. This class can be useful in embedded systems with a limited amount of RAM when you have to read big files. The ability to go in both directions can be useful if you need your data not in a linear and steady but some kind of noisy way.

Example:

typedef struct {
	float xValue;
	float yValue;
} myDataType;

typedef CircularBidirectionalFilereaderBuffer<myDataType, 1024> myBufferType;

FILE *f = fopen("data.bin", "rb");  // file must contain values of type myDataType
myBufferType buffer{f};
myBufferType::DefaultListener workerTask{buffer};

myDataType element;

buffer.getCurrent(element);
while (true) {
	buffer.getNext(element);
	...  // do stuff
}