nvs_read return value for entries with data of length 0

[r2r0]

Hi,

nvs_read returns ENONT error for entries with data length equal to 0.
It make impossible to distinguish between deleted/non present entries and entries with trimmed data.
Is it correct behavior?

Regards,

[Laczen]

Hi @r2r0, doing a write with length equal to zero is equivalent to a delete. This is used as an indication that this data does not need to be kept. When trying to read a deleted item it returns -ENOENT.

[r2r0]

Hi @Laczen, tanks for answer.
What about making this behaior explicite in documentation?
If needed I can make small PR.

[Laczen]

A PR to update the documentation would be welcome, thanks.