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revision 496 by ph10, Tue Mar 2 19:11:17 2010 UTC revision 515 by ph10, Tue May 4 09:12:25 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    5.  Added support for \N, which always matches any character other than
21        newline. (It is the same as "." when PCRE_DOTALL is not set.)
22    
23    6.  When compiling pcregrep with newer versions of gcc which may have
24        FORTIFY_SOURCE set, several warnings "ignoring return value of 'fwrite',
25        declared with attribute warn_unused_result" were given. Just casting the
26        result to (void) does not stop the warnings; a more elaborate fudge is
27        needed. I've used a macro to implement this.
28    
29    
30    Version 8.02 19-Mar-2010
31  ------------------------  ------------------------
32    
33  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.
34    
35  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
36      configured.      configured.
37    
38  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
39      original author of that file, following a query about its status.      original author of that file, following a query about its status.
40    
41  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
42      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.
43    
44  5.  A pattern such as (?&t)*+(?(DEFINE)(?<t>.)) which has a possessive  5.  A pattern such as (?&t)*+(?(DEFINE)(?<t>.)) which has a possessive
45      quantifier applied to a forward-referencing subroutine call, could compile      quantifier applied to a forward-referencing subroutine call, could compile
46      incorrect code or give the error "internal error: previously-checked      incorrect code or give the error "internal error: previously-checked
47      referenced subpattern not found".      referenced subpattern not found".
48    
49    6.  Both MS Visual Studio and Symbian OS have problems with initializing
50        variables to point to external functions. For these systems, therefore,
51        pcre_malloc etc. are now initialized to local functions that call the
52        relevant global functions.
53    
54    7.  There were two entries missing in the vectors called coptable and poptable
55        in pcre_dfa_exec.c. This could lead to memory accesses outsize the vectors.
56        I've fixed the data, and added a kludgy way of testing at compile time that
57        the lengths are correct (equal to the number of opcodes).
58    
59    8.  Following on from 7, I added a similar kludge to check the length of the
60        eint vector in pcreposix.c.
61    
62    9.  Error texts for pcre_compile() are held as one long string to avoid too
63        much relocation at load time. To find a text, the string is searched,
64        counting zeros. There was no check for running off the end of the string,
65        which could happen if a new error number was added without updating the
66        string.
67    
68    10. \K gave a compile-time error if it appeared in a lookbehind assersion.
69    
70    11. \K was not working if it appeared in an atomic group or in a group that
71        was called as a "subroutine", or in an assertion. Perl 5.11 documents that
72        \K is "not well defined" if used in an assertion. PCRE now accepts it if
73        the assertion is positive, but not if it is negative.
74    
75    12. Change 11 fortuitously reduced the size of the stack frame used in the
76        "match()" function of pcre_exec.c by one pointer. Forthcoming
77        implementation of support for (*MARK) will need an extra pointer on the
78        stack; I have reserved it now, so that the stack frame size does not
79        decrease.
80    
81    13. A pattern such as (?P<L1>(?P<L2>0)|(?P>L2)(?P>L1)) in which the only other
82        item in branch that calls a recursion is a subroutine call - as in the
83        second branch in the above example - was incorrectly given the compile-
84        time error "recursive call could loop indefinitely" because pcre_compile()
85        was not correctly checking the subroutine for matching a non-empty string.
86    
87    14. The checks for overrunning compiling workspace could trigger after an
88        overrun had occurred. This is a "should never occur" error, but it can be
89        triggered by pathological patterns such as hundreds of nested parentheses.
90        The checks now trigger 100 bytes before the end of the workspace.
91    
92    15. Fix typo in configure.ac: "srtoq" should be "strtoq".
93    
94    
95  Version 8.01 19-Jan-2010  Version 8.01 19-Jan-2010
96  ------------------------  ------------------------

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