Re: Postscript Parser

quite@dial.pipex.com (Aandi Inston)
19 Oct 1997 00:53:53 -0400

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From: quite@dial.pipex.com (Aandi Inston)
Newsgroups: comp.lang.postscript,comp.compilers
Date: 19 Oct 1997 00:53:53 -0400
Organization: UUNet UK server (post doesn't reflect views of UUNet UK)
References: 97-10-091
Keywords: parse

withers@cs.man.ac.uk (David Withers) wrote:


>I'm trying to create a tool that recognises rectangles and text in
>PostScript diagrams and makes HTML image maps. Does anyone know of a
>PostScript parser that creates AST's or a grammar that I can use to
>make one?


PostScript isn't a language that can be parsed by a grammar. It's a
full programming language, but it's stack based (no structure) and
interpreted so the running program can change the meaning.


You'll need a PostScript interpreter. The only free one is GhostScript
(not necessarily free if you're trying to write a commercial tool). It
has a text extraction tool, but text is so quirky in PostScript that
it can't always be reliably extracted. (For a start it can be in any
order on the page).
----------------------------------------
Aandi Inston quite@dial.pipex.com
Visit http://www.quite.com/ for info on PostScript,
--

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