(fhandler_base::lseek): Include high order bits in return.

Brian Ford ford@vss.fsi.com
Mon Nov 17 22:31:00 GMT 2003


On Mon, 17 Nov 2003, Corinna Vinschen wrote:

> On Mon, Nov 17, 2003 at 03:40:46PM -0600, Brian Ford wrote:
> > On Mon, 17 Nov 2003, Brian Ford wrote:
> >
> > > This bug fix got our app past its first problem with > 2 Gig files, but
> > > then it tripped over ftello.  I'm still trying to figure that one out.
> > >
> > > It looks like it got a 32 bit sign extended value somewhere.  Any help would
> > > be appreciated.  Thanks.
> > >
> > Well, that somewhere is ftello64.c line 111.  fp->_offset has a 32 bit
> > sign extended value.  Anybody know how it got there?
>
> That can't be it.  fp is of type FILE which is actually mapped to
> __sFILE64 in 64 bit case.  See newlib/libc/include/sys/reent.h.
> _offset is of type _off64_t there.
>
I think you misunderstood.  fp->_offset is a 64 bit type, but at the
ftello call in question, it contains a value that must have come from a 32
bit sign extension.  That's why I asked for help, because I have to figure
out what/who put it there.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
Phone: 314-551-8460
Fax:   314-551-8444



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