Hmmmm. I'm a java programmer and tomcat server admin by current trade, even though my degree was in EE, so I might be able to help you out there. Let me see what I can come up with...
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Monday, December 17, 2007 8:05 PM > To: gEDA user mailing list > Subject: Re: gEDA-user: gerbv - abnormal exit (2nd attempt) > > Stefan Petersen wrote: > > > 2) The aperture macro also contains operations like $4=$1X$5. > > My copy of "Gerber Format: Plot Data Format Reference Book" > is quite old, (c)1993. But some of the examples use the > "$4=" construct to work around the severe restriction on expressions: > > "Only one operator is allowed between commas.", and > "Only one operator is allowed on the right side of the > equals sign." > > If one wants to do anything remotely fancy, one almost has to > use this gimmick. I wonder if these restrictions have been > eased lately? Even simple left-to-right without operator > precedence would be a big step up. > > I seem to remember running into this problem back with > V1.0.2, and thought I might take a whack at fixing it, but I > recall gerbv is written mostly in Scheme. To me, it might as > well have been written in Boustrophedon. I know that Scheme > is a beautiful language, and I've taken a couple of stabs at > learning it, but I still don't know my cdr from a hole in the ground! > > Back then, I eventually found a web based viewer hosted on a > server by Scott Ananian which did grok the expressions > correctly (as far as I could tell), but Scott got his PhD and > the server which sat under his desk at MIT is no more. He > sent me his Java sources which must be served up by Tomcat. > To me, it's more Boustrophedon! > > Thank you Stefan for checking my stuff. I hope it stack > dumps for you so you'll have an easy time fixing it. I > understand your reluctance to change your parser when it does > everything you need for gEDA. > > I may have a look at gerber2pdf. At least it's written in > Python, a language I use often, and there may be some hope of > understanding it. > > Thanks again for looking. > > Jim > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
