Re: Problem with regular expressions

[Khaled Noaman <kn...@ca.ibm.com>]

Hi Bojan,

The following should fix the infinite loop problem with patterns starting
with ".*".

Index: RegularExpression.cpp
===================================================================
  @@ -1174,15 +1177,6 @@
        XMLMutexLock lockInit(&fMutex);

        compile(fTokenTree);
  -
  -     if (fOperations->getOpType() == Op::CLOSURE &&
  -             fOperations->getChild()->getOpType() ==
Op::DOT)                        {
  -
  -             Op* anchor = fOpFactory.createAnchorOp(isSet(fOptions,
SINGLE_LINE) ? chLatin_A

-
: chAt);
  -             anchor->setNextOp(fOperations);
  -             fOperations = anchor;
  -     }


Regards,
Khaled


Bojan Resnik wrote:

>   Greetings, everyone.
>
>   I see that the regular expression classes are not documented, but I
> still need to use them. However, I found that their behaviour is
> somewhat strange. Consider the program fragment below:
>
> #include <util/PlatformUtils.hpp>
> #include <util/regx/RegularExpression.hpp>
> ...
> void SomeFunction()
> {
>     RegularExpression regexp(".*i.*", "X");
>     regexp.matches("String");
> }
>
>   If the option string doesn't contain "X", that all the comparisons I
> tried failed miserably, even those that were not supposed to fail. If
> "X" is specified, then most of the comparisons are executed correctly,
> but the above code enters an infinite loop. Actually, if the pattern
> begins with ".*" and "X" is specified as an option, the code will
> enter infinite loop.
>
>   Is there a solution to this problem? I need regular expressions for
> the project I am working on.
>
>   Best regards,
>     Bojan
>
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Re[2]: Problem with regular expressions

[Bojan Resnik <re...@EUnet.yu>]

> Hi Bojan,

> The following should fix the infinite loop problem with patterns starting
> with ".*".

  Thank you, Khaled!
  This has indeed solved the problem.

  Best regards,
     Bojan




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