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revision 346 by ph10, Wed Apr 30 16:35:49 2008 UTC revision 376 by ph10, Sun Mar 1 12:00:59 2009 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.7 28-Apr-08  Version 7.9 xx-xxx-09
5    ---------------------
6    
7    1.  When building with support for bzlib/zlib (pcregrep) and/or readline
8        (pcretest), all targets were linked against these libraries. This included
9        libpcre, libpcreposix, and libpcrecpp, even though they do not use these
10        libraries. This caused unwanted dependencies to be created. This problem
11        has been fixed, and now only pcregrep is linked with bzlib/zlib and only
12        pcretest is linked with readline.
13    
14    2.  The "typedef int BOOL" in pcre_internal.h that was included inside the
15        "#ifndef FALSE" condition by an earlier change (probably 7.8/18) has been
16        moved outside it again, because FALSE and TRUE are already defined in AIX,
17        but BOOL is not.
18    
19    3.  The pcre_config() function was treating the PCRE_MATCH_LIMIT and
20        PCRE_MATCH_LIMIT_RETURSION values as ints, when they should be long ints.
21    
22    4.  The pcregrep documentation said spaces were inserted as well as colons (or
23        hyphens) following file names and line numbers when outputting matching
24        lines. This is not true; no spaces are inserted. I have also clarified the
25        wording for the --colour (or --color) option.
26    
27    
28    Version 7.8 05-Sep-08
29    ---------------------
30    
31    1.  Replaced UCP searching code with optimized version as implemented for Ad
32        Muncher (http://www.admuncher.com/) by Peter Kankowski. This uses a two-
33        stage table and inline lookup instead of a function, giving speed ups of 2
34        to 5 times on some simple patterns that I tested. Permission was given to
35        distribute the MultiStage2.py script that generates the tables (it's not in
36        the tarball, but is in the Subversion repository).
37    
38    2.  Updated the Unicode datatables to Unicode 5.1.0. This adds yet more
39        scripts.
40    
41    3.  Change 12 for 7.7 introduced a bug in pcre_study() when a pattern contained
42        a group with a zero qualifier. The result of the study could be incorrect,
43        or the function might crash, depending on the pattern.
44    
45    4.  Caseless matching was not working for non-ASCII characters in back
46        references. For example, /(\x{de})\1/8i was not matching \x{de}\x{fe}.
47        It now works when Unicode Property Support is available.
48    
49    5.  In pcretest, an escape such as \x{de} in the data was always generating
50        a UTF-8 string, even in non-UTF-8 mode. Now it generates a single byte in
51        non-UTF-8 mode. If the value is greater than 255, it gives a warning about
52        truncation.
53    
54    6.  Minor bugfix in pcrecpp.cc (change "" == ... to NULL == ...).
55    
56    7.  Added two (int) casts to pcregrep when printing the difference of two
57        pointers, in case they are 64-bit values.
58    
59    8.  Added comments about Mac OS X stack usage to the pcrestack man page and to
60        test 2 if it fails.
61    
62    9.  Added PCRE_CALL_CONVENTION just before the names of all exported functions,
63        and a #define of that name to empty if it is not externally set. This is to
64        allow users of MSVC to set it if necessary.
65    
66    10. The PCRE_EXP_DEFN macro which precedes exported functions was missing from
67        the convenience functions in the pcre_get.c source file.
68    
69    11. An option change at the start of a pattern that had top-level alternatives
70        could cause overwriting and/or a crash. This command provoked a crash in
71        some environments:
72    
73          printf "/(?i)[\xc3\xa9\xc3\xbd]|[\xc3\xa9\xc3\xbdA]/8\n" | pcretest
74    
75        This potential security problem was recorded as CVE-2008-2371.
76    
77    12. For a pattern where the match had to start at the beginning or immediately
78        after a newline (e.g /.*anything/ without the DOTALL flag), pcre_exec() and
79        pcre_dfa_exec() could read past the end of the passed subject if there was
80        no match. To help with detecting such bugs (e.g. with valgrind), I modified
81        pcretest so that it places the subject at the end of its malloc-ed buffer.
82    
83    13. The change to pcretest in 12 above threw up a couple more cases when pcre_
84        exec() might read past the end of the data buffer in UTF-8 mode.
85    
86    14. A similar bug to 7.3/2 existed when the PCRE_FIRSTLINE option was set and
87        the data contained the byte 0x85 as part of a UTF-8 character within its
88        first line. This applied both to normal and DFA matching.
89    
90    15. Lazy qualifiers were not working in some cases in UTF-8 mode. For example,
91        /^[^d]*?$/8 failed to match "abc".
92    
93    16. Added a missing copyright notice to pcrecpp_internal.h.
94    
95    17. Make it more clear in the documentation that values returned from
96        pcre_exec() in ovector are byte offsets, not character counts.
97    
98    18. Tidied a few places to stop certain compilers from issuing warnings.
99    
100    19. Updated the Virtual Pascal + BCC files to compile the latest v7.7, as
101        supplied by Stefan Weber. I made a further small update for 7.8 because
102        there is a change of source arrangements: the pcre_searchfuncs.c module is
103        replaced by pcre_ucd.c.
104    
105    
106    Version 7.7 07-May-08
107  ---------------------  ---------------------
108    
109  1.  Applied Craig's patch to sort out a long long problem: "If we can't convert  1.  Applied Craig's patch to sort out a long long problem: "If we can't convert
# Line 102  Version 7.7 28-Apr-08 Line 204  Version 7.7 28-Apr-08
204      ncurses library to be included for pcretest when ReadLine support is      ncurses library to be included for pcretest when ReadLine support is
205      requested, but also to allow for it to be overridden. This patch came from      requested, but also to allow for it to be overridden. This patch came from
206      Daniel Bergström.      Daniel Bergström.
207    
208  19. There was a typo in the file ucpinternal.h where f0_rangeflag was defined  19. There was a typo in the file ucpinternal.h where f0_rangeflag was defined
209      as 0x00f00000 instead of 0x00800000. Luckily, this would not have caused      as 0x00f00000 instead of 0x00800000. Luckily, this would not have caused
210      any errors with the current Unicode tables. Thanks to Peter Kankowski for      any errors with the current Unicode tables. Thanks to Peter Kankowski for
211      spotting this.      spotting this.
212    
213    
214  Version 7.6 28-Jan-08  Version 7.6 28-Jan-08

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