Re: Windows truncating data - Bug in src/libpspp/ext-array.c

[Ben Pfaff]

John Darrington <address@hidden> writes:

> So it would seem that it is unsafe (even on GNU/Linux) not to seek (or flush) 
> before switching between reading and writing.
>
> I sent Harry a patch which basically disabled this optimisation completely, 
> and
> Henry's report suggested that this fixed the problem, but caused the operation
> to take a lot longer to run (not suprising).   I suggest that the correct fix
> should involve a flag in the ext_array struct which records the direction of
> the most recent operation (read or write) and ensures that the seek is always
> done if the direction has changed.

Wow, good detective work.

Yes, that sounds like a good solution to me.