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http://bugs.exim.org/show_bug.cgi?id=1368




--- Comment #3 from Philip Hazel <[email protected]>  2013-07-15 10:13:48 
---
On Sun, 14 Jul 2013, Sébastien Wilmet  wrote:

> OK, so the safer way is to use pcre_exec() with PCRE_PARTIAL_HARD, with a
> larger segment if a partial match is returned, until a complete match is 
> found,
> or there is no match.

Yes.

> However we can see in the documentation (in the "ISSUES WITH MULTI-SEGMENT
> MATCHING" section):
> 
> > 4. Matching a subject string that is split into multiple  segments  may
> > not  always produce exactly the same result as matching over one single
> > long string, especially when PCRE_PARTIAL_SOFT  is  used.
> 
> Is it also true for pcre_exec() with PCRE_PARTIAL_HARD?

If you make correct use of the information about earliest character 
inspected and where the start of the match is, you should get the 
"right" result with PCRE_PARTIAL_HARD and pcre_exec(). The changes that
have happened to partial matches in different releases of PCRE are the
result of figuring out, over time, exactly what is needed to make this 
work.

Philip


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