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revision 496 by ph10, Tue Mar 2 19:11:17 2010 UTC revision 513 by ph10, Mon May 3 11:13:37 2010 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.02 01-Mar-2010  Version 8.10 03 May-2010
5    ------------------------
6    
7    1.  Added support for (*MARK:ARG) and for ARG additions to PRUNE, SKIP, and
8        THEN.
9    
10    2.  (*ACCEPT) was not working when inside an atomic group.
11    
12    3.  Inside a character class, \B is treated as a literal by default, but
13        faulted if PCRE_EXTRA is set. This mimics Perl's behaviour (the -w option
14        causes the error). The code is unchanged, but I tidied the documentation.
15    
16    4.  Inside a character class, PCRE always treated \R and \X as literals,
17        whereas Perl faults them if its -w option is set. I have changed PCRE so
18        that it faults them when PCRE_EXTRA is set.
19    
20    
21    Version 8.02 19-Mar-2010
22  ------------------------  ------------------------
23    
24  1.  The Unicode data tables have been updated to Unicode 5.2.0.  1.  The Unicode data tables have been updated to Unicode 5.2.0.
25    
26  2.  Added the option --libs-cpp to pcre-config, but only when C++ support is  2.  Added the option --libs-cpp to pcre-config, but only when C++ support is
27      configured.      configured.
28    
29  3.  Updated the licensing terms in the pcregexp.pas file, as agreed with the  3.  Updated the licensing terms in the pcregexp.pas file, as agreed with the
30      original author of that file, following a query about its status.      original author of that file, following a query about its status.
31    
32  4.  On systems that do not have stdint.h (e.g. Solaris), check for and include  4.  On systems that do not have stdint.h (e.g. Solaris), check for and include
33      inttypes.h instead. This fixes a bug that was introduced by change 8.01/8.      inttypes.h instead. This fixes a bug that was introduced by change 8.01/8.
34    
35  5.  A pattern such as (?&t)*+(?(DEFINE)(?<t>.)) which has a possessive  5.  A pattern such as (?&t)*+(?(DEFINE)(?<t>.)) which has a possessive
36      quantifier applied to a forward-referencing subroutine call, could compile      quantifier applied to a forward-referencing subroutine call, could compile
37      incorrect code or give the error "internal error: previously-checked      incorrect code or give the error "internal error: previously-checked
38      referenced subpattern not found".      referenced subpattern not found".
39    
40    6.  Both MS Visual Studio and Symbian OS have problems with initializing
41        variables to point to external functions. For these systems, therefore,
42        pcre_malloc etc. are now initialized to local functions that call the
43        relevant global functions.
44    
45    7.  There were two entries missing in the vectors called coptable and poptable
46        in pcre_dfa_exec.c. This could lead to memory accesses outsize the vectors.
47        I've fixed the data, and added a kludgy way of testing at compile time that
48        the lengths are correct (equal to the number of opcodes).
49    
50    8.  Following on from 7, I added a similar kludge to check the length of the
51        eint vector in pcreposix.c.
52    
53    9.  Error texts for pcre_compile() are held as one long string to avoid too
54        much relocation at load time. To find a text, the string is searched,
55        counting zeros. There was no check for running off the end of the string,
56        which could happen if a new error number was added without updating the
57        string.
58    
59    10. \K gave a compile-time error if it appeared in a lookbehind assersion.
60    
61    11. \K was not working if it appeared in an atomic group or in a group that
62        was called as a "subroutine", or in an assertion. Perl 5.11 documents that
63        \K is "not well defined" if used in an assertion. PCRE now accepts it if
64        the assertion is positive, but not if it is negative.
65    
66    12. Change 11 fortuitously reduced the size of the stack frame used in the
67        "match()" function of pcre_exec.c by one pointer. Forthcoming
68        implementation of support for (*MARK) will need an extra pointer on the
69        stack; I have reserved it now, so that the stack frame size does not
70        decrease.
71    
72    13. A pattern such as (?P<L1>(?P<L2>0)|(?P>L2)(?P>L1)) in which the only other
73        item in branch that calls a recursion is a subroutine call - as in the
74        second branch in the above example - was incorrectly given the compile-
75        time error "recursive call could loop indefinitely" because pcre_compile()
76        was not correctly checking the subroutine for matching a non-empty string.
77    
78    14. The checks for overrunning compiling workspace could trigger after an
79        overrun had occurred. This is a "should never occur" error, but it can be
80        triggered by pathological patterns such as hundreds of nested parentheses.
81        The checks now trigger 100 bytes before the end of the workspace.
82    
83    15. Fix typo in configure.ac: "srtoq" should be "strtoq".
84    
85    
86  Version 8.01 19-Jan-2010  Version 8.01 19-Jan-2010
87  ------------------------  ------------------------

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