[TUHS] C Btrees

[TUHS] C Btrees

[Noel Hunt]

There is a little known suite of programs, written by Peter Weinberger,
found as 'btree', or 'cbt', in the archives for Eighth and Tenth
Edition.

The code in the Eighth Edition archive seems to be the earliest, and
has fewer utilities than available in the Tenth Edition code. A search
through files shows that it was used by 'road', 'weather' and
'apnews'.

There is an ms file, 'memo', describing the programs, amongst the code,
but an appendix seems to be missing. If anyone knows about this or
where it might be I'd like to get my hands on it.

'Memo' itself is interesting because it's the only troff document I've
seen amongst the reseach papers (excluding Christopher Van Wyk's own
paper of course) that uses 'ideal', in this case, for drawing a
picture depicting B-tree structure.

[TUHS] Re: C Btrees

[Douglas McIlroy]

I used Ideal to make most of the figures in "Getting raster ellipses
right", the first paper in CSTR #155. That paper grew out of a simple
request from Rob Pike for an ellipse-drawing primitive for the Blit.

Doug

On Fri, Jun 23, 2023 at 10:34 PM Noel Hunt <noel.hunt@gmail.com> wrote:
>
> There is a little known suite of programs, written by Peter Weinberger,
> found as 'btree', or 'cbt', in the archives for Eighth and Tenth
> Edition.
>
> The code in the Eighth Edition archive seems to be the earliest, and
> has fewer utilities than available in the Tenth Edition code. A search
> through files shows that it was used by 'road', 'weather' and
> 'apnews'.
>
> There is an ms file, 'memo', describing the programs, amongst the code,
> but an appendix seems to be missing. If anyone knows about this or
> where it might be I'd like to get my hands on it.
>
> 'Memo' itself is interesting because it's the only troff document I've
> seen amongst the reseach papers (excluding Christopher Van Wyk's own
> paper of course) that uses 'ideal', in this case, for drawing a
> picture depicting B-tree structure.

[TUHS] Re: C Btrees

[Noel Hunt]

I see, thanks for that information. I was aware of that paper's
existence but I have never read it. I think it was on the old
Bell Labs website there was a collection of those CSTRs but
I can't seem to find them now.

On Sat, 24 Jun 2023 at 22:49, Douglas McIlroy
<douglas.mcilroy@dartmouth.edu> wrote:
>
> I used Ideal to make most of the figures in "Getting raster ellipses
> right", the first paper in CSTR #155. That paper grew out of a simple
> request from Rob Pike for an ellipse-drawing primitive for the Blit.
>
> Doug
>
> On Fri, Jun 23, 2023 at 10:34 PM Noel Hunt <noel.hunt@gmail.com> wrote:
> >
> > There is a little known suite of programs, written by Peter Weinberger,
> > found as 'btree', or 'cbt', in the archives for Eighth and Tenth
> > Edition.
> >
> > The code in the Eighth Edition archive seems to be the earliest, and
> > has fewer utilities than available in the Tenth Edition code. A search
> > through files shows that it was used by 'road', 'weather' and
> > 'apnews'.
> >
> > There is an ms file, 'memo', describing the programs, amongst the code,
> > but an appendix seems to be missing. If anyone knows about this or
> > where it might be I'd like to get my hands on it.
> >
> > 'Memo' itself is interesting because it's the only troff document I've
> > seen amongst the reseach papers (excluding Christopher Van Wyk's own
> > paper of course) that uses 'ideal', in this case, for drawing a
> > picture depicting B-tree structure.

[TUHS] CSTRs [was Re: Re: C Btrees]

[arnold]

I have a bunch of the CSTRs that I downloaded back when they
were still there.

Warren -- do you want them for the archive?

Thanks,

Arnold

Noel Hunt <noel.hunt@gmail.com> wrote:

> I see, thanks for that information. I was aware of that paper's
> existence but I have never read it. I think it was on the old
> Bell Labs website there was a collection of those CSTRs but
> I can't seem to find them now.
>
> On Sat, 24 Jun 2023 at 22:49, Douglas McIlroy
> <douglas.mcilroy@dartmouth.edu> wrote:
> >
> > I used Ideal to make most of the figures in "Getting raster ellipses
> > right", the first paper in CSTR #155. That paper grew out of a simple
> > request from Rob Pike for an ellipse-drawing primitive for the Blit.
> >
> > Doug
> >
> > On Fri, Jun 23, 2023 at 10:34 PM Noel Hunt <noel.hunt@gmail.com> wrote:
> > >
> > > There is a little known suite of programs, written by Peter Weinberger,
> > > found as 'btree', or 'cbt', in the archives for Eighth and Tenth
> > > Edition.
> > >
> > > The code in the Eighth Edition archive seems to be the earliest, and
> > > has fewer utilities than available in the Tenth Edition code. A search
> > > through files shows that it was used by 'road', 'weather' and
> > > 'apnews'.
> > >
> > > There is an ms file, 'memo', describing the programs, amongst the code,
> > > but an appendix seems to be missing. If anyone knows about this or
> > > where it might be I'd like to get my hands on it.
> > >
> > > 'Memo' itself is interesting because it's the only troff document I've
> > > seen amongst the reseach papers (excluding Christopher Van Wyk's own
> > > paper of course) that uses 'ideal', in this case, for drawing a
> > > picture depicting B-tree structure.