SPIFFS_eof() and SPIFFS_tell() return wrong value

[ArtemPisarenko]

Two different cases.

1. When SPIFFS_eof() called on just opened empty file, it returns 0.
   Debugging shows that fd->size = 0xFFFFFFFF at here, looking abnormal for me.
2. When file opened with SPIFFS_APPEND, seeked to the middle and being written, calling SPIFFS_eof() returns 0 and calling SPIFFS_tell() returns value which would be in case if no SPIFFS_APPEND used.

[pellepl]

Ok, thanks for reporting - I'll look into it.

Regarding length = 0xffffffff - this is valid for newly created files without content. Regard 0xffffffffff as 0. It is a minor optimization when actually writing something in the future. Instead of needing to allocate a new page,I just fill in the length. However, eof probably does not take this special case in account.

I remember I had to make something not so beautiful with file offsets when caches was created, I hope I can fix tell to be posix-compliant.

Anyhow, thanks again for reporting.

[ArtemPisarenko]

Glad to help you with improvements. And thank YOU for such great work ! :)