Comments (4)
Any access beyond the current buffer bounds is a violation of the contract and assuming anything about the buffer internal state is a usage error.
If the values returned for the populated buffer positions is correct then the buffer operates as intended.
In other words, accessing positions beyond 0 is an error, you are making assumptions on how the buffer operates on its internals.
It wasn't arising in the previous version because the buffer wasn't protecting its internal state properly: now the buffer does that better and it only allows you to access populated positions. If you have only one element it doesn't matter what's the index you provide, you will always get that single item.
Push in another one and you'll see the two values alternating...
from circularbuffer.
Another way to describe the behaviour, if you want to print the buffer contents you should only print the items between position 0
and position buffer.size() - 1
: in your case between 0
and 0
after the first insertion....
See the two for-loops examples at https://github.com/rlogiacco/CircularBuffer#automatic-optimization and the code at
CircularBuffer/examples/Test/Test.ino
Lines 6 to 27 in cf4ded9
If you want to inspect the internals for debugging reasons, you can enable debugging and use the two debug
functions exposed by the library:
#define CIRCULAR_BUFFER_DEBUG
#include <CircularBuffer.h>
CircularBuffer<long, 6> buffer;
And then you can call buffer.debug(Serial)
or buffer.debug(Serial, customFunction)
to see the whole buffer contents with the head and tail positions.
from circularbuffer.
You're right but for a simple user like me it would be more comfortable to indicate the data is not available (return "nan") without the need to add additional conditions in a for cycle.
from circularbuffer.
from circularbuffer.
Related Issues (20)
- CircularBuffer.ino doesn't compile with Arduino 1.8.13 HOT 3
- Fills the whole buffer with first value HOT 5
- Circular Buffer requires declarion as ino global HOT 5
- Allow using buffers as instance members HOT 3
- 'CircularBuffer<T, S, IT>::buffer' has incomplete type HOT 2
- Can't use library within a class. HOT 3
- Array of String problem
- Array-like indexed write operation? HOT 12
- Overwriting pointers to objects and having memory leaks HOT 3
- Add 'copy to array' method HOT 8
- Passing elements of non-fundamental type by reference HOT 2
- CircularBuffer in RTC Memory while DeepSleep on ESP32 HOT 5
- Reading data in the historical order HOT 3
- Possible bug when unshift interrupted by push
- bug:Memory trample HOT 3
- Remove item from the middle of the buffer HOT 4
- Namespace conflict with internal Arduino CircularBuffer HOT 4
- How can I Declare CircularBuffer variable first and initialize later? HOT 1
- How to use these in an array? HOT 3
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from circularbuffer.