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Re: genx - abstract output

• To: Tim Bray <tbray@t...>
• Subject: Re: genx - abstract output
• From: John Cowan <cowan@m...>
• Date: Wed, 21 Jan 2004 22:54:09 -0500
• Cc: xml-dev@l...
• In-reply-to: <A03C8438-4C8C-11D8-905C-000A95A51C9E@t...>
• References: <A03C8438-4C8C-11D8-905C-000A95A51C9E@t...>
• User-agent: Mutt/1.3.28i

Tim Bray scripsit:

> 1. The sweet spot for XML is interchange, and FILE * is a nice general 
> basis for almost all kinds of interchange.
> 2. If you're going to build an XML instance in memory, wouldn't it be 
> more natural to pull together a DOM or your own private data structure 
> and then serialize it in one fell swoop?

Not necessarily.  For example, if I want to write to a non-UTF-8 file
stream, then I could write via UTF-8 abstract output and use convert()
to fix things up.

> 3. This lowers the barrier-to-entry to implementers, who are going to 
> see genxStartDocument(genxWriter w, FILE * file) and say "oh yeah I 
> know what to do" as opposed to having to figure out another flavor of 
> I/O abstraction and write a stub of some kind.

A simple implementation strategy would be to keep the FILE * argument,
but also provide a call to set/get an output handler, to be invoked only
if the FILE * argument is NULL.  That makes easy things easy and hard
things possible.

-- 
Principles.  You can't say A is         John Cowan <jcowan@r...>
made of B or vice versa.  All mass      http://www.reutershealth.com
is interaction.  --Richard Feynman      http://www.ccil.org/~cowan

• Follow-Ups:
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    • From: Toni Uusitalo <toni.uusitalo@p...>
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    • From: Adam Turoff <ziggy@p...>

• References:
  • genx - abstract output
    • From: Tim Bray <tbray@t...>

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