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revision 30 by nigel, Sat Feb 24 21:38:53 2007 UTC revision 31 by nigel, Sat Feb 24 21:38:57 2007 UTC
# Line 2  ChangeLog for PCRE Line 2  ChangeLog for PCRE
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3    
4    
5    Version 2.04 18-Feb-99
6    ----------------------
7    
8    1. For parenthesized subpatterns with repeats whose minimum was zero, the
9    computation of the store needed to hold the pattern was incorrect (too large).
10    If such patterns were nested a few deep, this could multiply and become a real
11    problem.
12    
13    2. Added /M option to pcretest to show the memory requirement of a specific
14    pattern. Made -m a synonym of -s (which does this globally) for compatibility.
15    
16    3. Subpatterns of the form (regex){n,m} (i.e. limited maximum) were being
17    compiled in such a way that the backtracking after subsequent failure was
18    pessimal. Something like (a){0,3} was compiled as (a)?(a)?(a)? instead of
19    ((a)((a)(a)?)?)? with disastrous performance if the maximum was of any size.
20    
21    
22  Version 2.03 02-Feb-99  Version 2.03 02-Feb-99
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24    
25  1. Fixed typo and small mistake in man page.  1. Fixed typo and small mistake in man page.
26    
27  2. Added 4th condition (GPL supersedes) and created separate LICENCE file.  2. Added 4th condition (GPL supersedes if conflict) and created separate
28    LICENCE file containing the conditions.
29    
30  3. Updated pcretest so that patterns such as /abc\/def/ work like they do in  3. Updated pcretest so that patterns such as /abc\/def/ work like they do in
31  Perl, that is the internal \ allows the delimiter to be included in the  Perl, that is the internal \ allows the delimiter to be included in the
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