On Mon, Apr 25, 2022 at 2:27 PM Bart Schaefer <schaefer@brasslantern.com> wrote:
>
> Theoretically we can block-read with impunity in cases 1 and 2 (anyone
> disagree?).  Testing for seek-ability would allow doing the "read too
> much and back up" trick in case 3.  I don't immediately see any way to
> avoid reading one byte at a time in case 4, does anyone have a
> suggestion?

Try this?