On 2/11/07, David Chisnall <[EMAIL PROTECTED]> wrote:
On 11 Feb 2007, at 21:05, Yen-Ju Chen wrote:
> Ragel help you write a XML parser.
> It matches a string/regex and fire a function/method call you
> assigned.
> So if a '<message><bod' is received,
> you can matches '<message>' and fire call_message_tag()
> and keep '<bod' in buffer for the next iteration.
> If you have a home-made XML parser,
> it basically replace the part where you need to match string
> using strcmp or NSScanner.
>
> Here is another description:
> http://www.zedshaw.com/tips/ragel_state_charts.html
> Just read the top introduction part.
> The rest is not very useful in this discussion.
Aha! Yes, it does seem like it would be useful. My XML parser code
is quite ugly in places (lots of C preprocessor stuff), so it would
be nice to be able to replace all of that with something simpler to
maintain. I shall have a play with Ragel at some point.
Maybe you can look at the source code of Hpricot:
http://code.whytheluckystiff.net/hpricot/
It is a little messy because it has to use Ruby runtime in C.
But it may save you some time.
Good Luck !!
Yen-Ju
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