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Article View: comp.lang.postscript
Article #176

Re: Need an intelligent Ascii - PS Filter

#176
From: Carl J Lydick
Date: Sun, 02 Aug 1992 19:48
28 lines
2414 bytes
In article <3669@ecicrl.ocunix.on.ca>, clewis@ferret.ocunix.on.ca (Chris Lewis) writes:
>In article <1992Aug2.001052.23580@cco.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
>|In article <3668@ecicrl.ocunix.on.ca>, clewis@ferret.ocunix.on.ca (Chris Lewis) writes:
>|>While things that are DSC compliant will lead off with %!PS-Adobe-, you're
>|>being much too strict.  By convention, PostScript always starts with
>|>%!.  So if the file starts with %!, you can assume it to be PostScript.
>|>Regardless of whether the file claims to be DSC compliant or not.
>
>|>Almost all applications use this convention.  Though, there are some stupid
>|>broken ones.  Ie: WP apparently leads files with <control-D>%!.
>
>|Which is, in my opinion, a reasonable thing to do, as it's the only way to
>|guarantee that the previous PostScript program has ended before yours starts.
>
>A much better way is to fix the spooler to always emit the ^D at the end of
>jobs.  Applications should *not* be generating ^Ds.

In principal, I agree with you:  Applications should not HAVE to generate
control-D's.  In practice, an application has no guarantee that the software
that sends the file to the printer will do the right thing.
--------------------------------------------------------------------------------
Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL

Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
understanding of astronomy is purely at the amateur level (or below).  So
unless what I'm saying is directly related to VAX/VMS, don't hold me or my
organization responsible for it.  If it IS related to VAX/VMS, you can try to
hold me responsible for it, but my organization had nothing to do with it.
Technical Details
Message-ID: <1992Aug2.194857.28249@cco.caltech.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
References: <1992Aug1.045437.1616@thunder.mcrcim.mcgill.edu> <3668@ecicrl.ocunix.on.ca> <1992Aug2.001052.23580@cco.caltech.edu>,<3669@ecicrl.ocunix.on.ca>

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Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
Subject: Re: Need an intelligent Ascii - PS Filter
Message-ID: <1992Aug2.194857.28249@cco.caltech.edu>
Sender: news@cco.caltech.edu
Nntp-Posting-Host: sol1.gps.caltech.edu
Reply-To: carl@SOL1.GPS.CALTECH.EDU
Organization: HST Wide Field/Planetary Camera
References: <1992Aug1.045437.1616@thunder.mcrcim.mcgill.edu> <3668@ecicrl.ocunix.on.ca> <1992Aug2.001052.23580@cco.caltech.edu>,<3669@ecicrl.ocunix.on.ca>
Date: Sun, 2 Aug 1992 19:48:57 GMT
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