On Sat, 2007-09-15 at 00:12 +0300, Atis wrote:
> On 9/14/07, Jared Smith <[EMAIL PROTECTED]> wrote:
> > On Fri, 2007-09-14 at 10:51 -0600, Anthony Francis wrote:
> > > . matches any number of the preceding character, change it to _X.*X.
> >
> > That still won't help. Once the Asterisk pattern matching parser sees a
> > period in the pattern, it ignores anything after it. (I'm not exactly
> > happy about that, but that's the way it is.) In short, Asterisk doesn't
> > currently have a good way of handling this situation. Hopefully
> > somebody infinitely smarter than I am will take pity on our plight and
> > give us a some more advanced pattern-matching tools. (Hint, hint)
>
> Well, you can have some 10 or so patterns (how long can the number
> before be), with X, as X means one digit..
>
> For example:
>
> exten => _X*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXXXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> exten => _XXXXXXXXXX*.,1,Goto(default-wildcard|${EXTEN}|1)
> Atis-- People are spoiled by regex's, and they want to able to make a match vs. something I call "trailing context". What they don't realize is that such matches take (possibly) large amounts of time to complete, because they loop or are recursive, depending on the implementation. Thus, a regex like X+\* (which would mean "1 or more X's followed by an asterisk." would expand out to the 10 (actually perhaps many more) lines above-- and run (unexpectedly) slower. The trouble is, the pattern matcher wouldn't know how long an expression like X+\* should be, and could generate hundreds of entries. (if the pattern length is limited to 256 chars, say). It is far better to explode out the entries yourself, as you outlined above. You know the max size of incoming stream.... murf > [default-wildcard] > exten => _X.,1,Macro(whatever) > > Regards, > Atis > -- Steve Murphy Software Developer Digium
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