On Wed, 4 Aug 2004, Nigel Horne wrote:
> On Wednesday 04 Aug 2004 07:17, Damian Menscher wrote:
> > - removed the comment, since there are already plenty of examples
>
> Thank you for the patch which I will apply. It may take a few days.
>
> The comment has nothing to do with examples, the comments is a line that should
> work but doesn't. I'd like to fix it and use it instead.
Oh, whoops. Didn't notice the +/* difference in it.
To make the commented version work (which I recommend) you need to use
enhanced regular expressions (egrep vs grep) since basic regexp doesn't
know about the + operator (see regex(7) for documentation on this).
To do that, you need REG_EXTENDED in your cflags (see regcomp(3)
manpage) when compiling the expression with regcomp(). In other words,
change the line
if(regcomp(®, *possible, 0) != 0) {
to
if(regcomp(®, *possible, REG_EXTENDED) != 0) {
If you're doing that, there are some other tricks you can use, like
writing 172.16/12 as ^172.(1[6-9]|2[0-9]|3[01]).[0-9]+.[0-9]+$ but that
may get excessively confusing by the time you throw 20 \'s into it. Up
to you whether you want to deal with that mess.
Damian Menscher
--
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