Why does PartialInputStream.Seek not return a relative value?

[mrtop]

PartialInputStream.Position return The current position within the stream.
but PartialInputStream.Seek return The current position within the baseStream.
why?

It should not be readPos_ - start ?

[piksel]

I guess you could argue either would be the "correct" return value here. My guess is that it's because Seek would be used by something else that needs the non-relative offset.

Ideally, it feels like that nothing from the base stream should leak to the outer API, and perhaps this was even a mistake. Unfortunately, changing this would be a breaking change, but the docs should probably mention this.

[mrtop]

So normally it should be "return readPos_ - start_"
It can be changed in my own project without affecting its other functions