Article View: comp.lang.postscript
Article #7363Re: Restoring elements of strings
From: Geoffrey Cooper
Date: Mon, 01 Aug 1988 16:56
Date: Mon, 01 Aug 1988 16:56
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In article <570@etive.ed.ac.uk>, jcb@lfcs.ed.ac.uk (Julian Bradfield) writes:
> The current Postscript design does not undo changes made to elements
> of strings when it `restore's VM. Despite the warning in the Red Book,
> I know programs that use this. Question: do non-Adobe emulations of
> Postscript also emulate this bug/feature, or do they correct it?
You've answered the question. Since there are programs that use the
"feature", the clone's will have to support it. Of course, I can only
vouch for UltraScript. It falls out as an obvious efficiency hack in
the way you implement PostScript save/restore.
In the presence of multitasking (e.g., News and display postscript)
which use a different implementation of save/restore, I wouldn't be
suprised to see that feature go away.
- Geof
--
{decwrl,sun,saber}!imagen!geof
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arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!uwmcsd1!ig!agate!ucbvax!decwrl!sun!imagen!geofReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!uwmcsd1!ig!agate!ucbvax!decwrl!sun!imagen!geof From: geof@imagen.UUCP (Geoffrey Cooper) Newsgroups: comp.lang.postscript Subject: Re: Restoring elements of strings Summary: "Bug" maintained under UltraScript Message-ID: <1762@imagen.UUCP> Date: 1 Aug 88 16:56:40 GMT References: <570@etive.ed.ac.uk> Organization: IMAGEN Corporation, Santa Clara, CA 95052-8101 Lines: 18