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June 1999

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1999.06.03 19:48 "Large File Support", by Bruce Forsberg
1999.06.04 03:45 "Re: Large File Support", by Frank Warmerdam
1999.06.04 07:32 "Re: Large File Support", by Rob Tillaart
1999.06.07 07:05 "Re: Large File Support", by Rainer Wiesenfarth
1999.06.08 21:14 "Re: Large File Support", by Peter Smith
1999.06.08 21:58 "Re: Large File Support", by Ed Grissom
1999.06.08 22:52 "Re: Large File Support", by Peter Smith
1999.06.09 01:27 "Re: Large File Support", by Martin Bailey
1999.06.09 06:50 "Re: Large File Support", by Owen Pearn
1999.06.09 14:33 "Re: Large File Support", by Martin Bailey
1999.06.09 08:07 "Re: Large File Support", by Rob Tillaart
1999.06.04 18:35 "Re: Large File Support", by Bruce Forsberg
1999.06.07 13:03 "Re: Large File Support", by Frank Warmerdam
1999.06.09 03:05 "Re: Large File Support", by <glen@lumisys.com>
1999.06.09 13:13 "Re: Large File Support", by Ed Grissom
1999.06.09 13:33 "Re: Large File Support", by Frank Warmerdam
1999.06.09 14:08 "Re: Large File Support", by Ed Grissom
1999.06.09 18:50 "Re: Large File Support", by Chris Barker
1999.06.09 18:41 "Large File Support", by Chris Barker
1999.06.10 13:21 "Re: Large File Support", by Chris Hanson
1999.06.10 13:52 "Re: Large File Support", by Frank Warmerdam
1999.06.10 14:37 "Re: Large File Support", by John Aldridge
1999.06.10 15:10 "Re: Large File Support", by Peter Smith
1999.06.10 16:56 "Re: Large File Support", by Chris Barker
1999.06.14 11:16 "Re: Large File Support", by Martin Bailey
1999.06.14 14:58 "Re: Large File Support", by Tom Lane
1999.06.14 15:30 "Re: Large File Support", by Eric Shapiro
1999.06.14 16:27 "Re: Large File Support", by Chris Barker
1999.06.14 15:51 "Re: Large File Support", by Martin Bailey
1999.06.09 15:52 "Re: Large File Support", by Ed Grissom
1999.06.10 09:48 "Re: Large File Support", by Klaus Bartz
1999.06.10 13:05 "Re: Large File Support", by Chris Hanson
1999.06.11 01:48 "Re: Large File Support", by <glen@lumisys.com>

1999.06.07 13:03 "Re: Large File Support", by Frank Warmerdam

Rainer Wiesenfarth wrote:
> I'd prefer the professional way rather than the quick-and-dirty one: If
> offsets in the file are changed to be 64 Bit, then ALL offsets should
> be changed.

Rainer,

Given time to reflect, I agree that my proposal would lead into a morass
of problems somewhat akin to segmented programming on the x86.  I agree
that a better approach is 64bit offsets used everywhere offsets apply. 

> In addition, some other changes could be discussed in this context:
> - the 'Count' field in the Directory Entry should also be 64 bit. This
>   will not be neccessary for today's needs, but who knows what tomorrow
>   will bring us.
> - maybe the 'Tag' field should be extended to 32 bit. This is only to
>   avoid a further redefinition of the basics of TIFF.
> - maybe the 'Type' field should be extended to 32bit. This would make
>   the Directory Entry size a multiple of 8.

I suppose that since the directory format would already have to change to
handle the 64bit NextIFD, and Offset values, it wouldn't hurt to do the
rest.  

> - as the size of the offset is now 64 bit, more data (e.g. 8 bytes)
>   can be packed in the offset field without the need for redirection.

I suppose so. 

Because this approach requires fundamental changes to the directory format
I think it will be significantly harder to pull off than the offset32 approach.
Now I am waffling again.   It makes my brain hurt. 

Regards,

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