[...skull-and-crossbones with text warning...]
That looks identical to the comment at the head of display.c from
the Gosling derivative I use.
Yes, it's the same in the copy of Gosling Emacs
I got. I asked
Gosling himself, and he referred me to Brian Reid. He got it from
Gosling in 1983, and it was modified at DEC over the years. What
pedigree is your copy?
I got it from a prerelase of Eunice, obtained because one of the people
behind Eunice personally knew some people at the lab I was then hanging
out at. ("Then" is mid-'80s sometime.) Once I started using a real
Unix (4.2c, then 4.3 shortly after that, then SunOS, then....) I ripped
out the special-case Eunice code and have been maintaining (and slowly
evolving) it over the years since then.
Incidentally (and only partially releatedly), the comment means what it
says. I once tried to rewrite that module, to teach myself how it
worked, and succeeded in nothing but slowing it down by about a factor
of some 2 to 3 and introducing assorted bugs as well.
Someday I'm going to find the time to really figure it out.
I don't know how to usefully describe what sort of version it is; that
is, I don't know what information would be useful to you. If you can
describe a useful test, I can see what it gives....
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