Bill Guion wrote:
At 12:30 AM +0200 5/19/10, Rene Veerman wrote:
Hi.
I'm trying to build a html analyzer that looks at natural words in html text.
I'd like to build a routine that walks through the HTML character by
character, but i'm not sure on how to properly walk through escaped "
and ' characters in javascript or other embedded languages. Skipping
the first " and ' is no problem, but after that, the escaped " and ',
they can get difficult imo.
If you have any ideas on this i'd like to hear 'm..
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Renee,
I agree with the previous post - what you want to do is non-trivial.
However, to address your question: one approach is to create a single
quote flag (sqf) and a double quote flag (dqf). When you encounter
the first quote, set that flag. When you encounter the second quote
of the same type, clear the flag. At the end, both flags should be
clear, or the html is mal-formed. You can also get more sophisticated
and verify that you do not encounter a single, double, single
sequence, or a double, single, double sequence. That gets more
involved by remembering which quote was first, second, and third -
third should be same as second, for example.
There's more to it than that. You also need to handle escaping of the
same quote character within the string's content. This is parsing 101 :)
Cheers,
Rob.
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