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revision 346 by ph10, Wed Apr 30 16:35:49 2008 UTC revision 378 by ph10, Sun Mar 1 14:13:34 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    5.  In pcregrep, when --colour was used with -o, the list of matching strings
28        was not coloured; this is different to GNU grep, so I have changed it to be
29        the same.
30    
31    6.  When --colo(u)r was used in pcregrep, only the first matching substring in
32        each matching line was coloured. Now it goes on to look for further matches
33        of any of the test patterns, which is the same behaviour as GNU grep.
34    
35    
36    Version 7.8 05-Sep-08
37    ---------------------
38    
39    1.  Replaced UCP searching code with optimized version as implemented for Ad
40        Muncher (http://www.admuncher.com/) by Peter Kankowski. This uses a two-
41        stage table and inline lookup instead of a function, giving speed ups of 2
42        to 5 times on some simple patterns that I tested. Permission was given to
43        distribute the MultiStage2.py script that generates the tables (it's not in
44        the tarball, but is in the Subversion repository).
45    
46    2.  Updated the Unicode datatables to Unicode 5.1.0. This adds yet more
47        scripts.
48    
49    3.  Change 12 for 7.7 introduced a bug in pcre_study() when a pattern contained
50        a group with a zero qualifier. The result of the study could be incorrect,
51        or the function might crash, depending on the pattern.
52    
53    4.  Caseless matching was not working for non-ASCII characters in back
54        references. For example, /(\x{de})\1/8i was not matching \x{de}\x{fe}.
55        It now works when Unicode Property Support is available.
56    
57    5.  In pcretest, an escape such as \x{de} in the data was always generating
58        a UTF-8 string, even in non-UTF-8 mode. Now it generates a single byte in
59        non-UTF-8 mode. If the value is greater than 255, it gives a warning about
60        truncation.
61    
62    6.  Minor bugfix in pcrecpp.cc (change "" == ... to NULL == ...).
63    
64    7.  Added two (int) casts to pcregrep when printing the difference of two
65        pointers, in case they are 64-bit values.
66    
67    8.  Added comments about Mac OS X stack usage to the pcrestack man page and to
68        test 2 if it fails.
69    
70    9.  Added PCRE_CALL_CONVENTION just before the names of all exported functions,
71        and a #define of that name to empty if it is not externally set. This is to
72        allow users of MSVC to set it if necessary.
73    
74    10. The PCRE_EXP_DEFN macro which precedes exported functions was missing from
75        the convenience functions in the pcre_get.c source file.
76    
77    11. An option change at the start of a pattern that had top-level alternatives
78        could cause overwriting and/or a crash. This command provoked a crash in
79        some environments:
80    
81          printf "/(?i)[\xc3\xa9\xc3\xbd]|[\xc3\xa9\xc3\xbdA]/8\n" | pcretest
82    
83        This potential security problem was recorded as CVE-2008-2371.
84    
85    12. For a pattern where the match had to start at the beginning or immediately
86        after a newline (e.g /.*anything/ without the DOTALL flag), pcre_exec() and
87        pcre_dfa_exec() could read past the end of the passed subject if there was
88        no match. To help with detecting such bugs (e.g. with valgrind), I modified
89        pcretest so that it places the subject at the end of its malloc-ed buffer.
90    
91    13. The change to pcretest in 12 above threw up a couple more cases when pcre_
92        exec() might read past the end of the data buffer in UTF-8 mode.
93    
94    14. A similar bug to 7.3/2 existed when the PCRE_FIRSTLINE option was set and
95        the data contained the byte 0x85 as part of a UTF-8 character within its
96        first line. This applied both to normal and DFA matching.
97    
98    15. Lazy qualifiers were not working in some cases in UTF-8 mode. For example,
99        /^[^d]*?$/8 failed to match "abc".
100    
101    16. Added a missing copyright notice to pcrecpp_internal.h.
102    
103    17. Make it more clear in the documentation that values returned from
104        pcre_exec() in ovector are byte offsets, not character counts.
105    
106    18. Tidied a few places to stop certain compilers from issuing warnings.
107    
108    19. Updated the Virtual Pascal + BCC files to compile the latest v7.7, as
109        supplied by Stefan Weber. I made a further small update for 7.8 because
110        there is a change of source arrangements: the pcre_searchfuncs.c module is
111        replaced by pcre_ucd.c.
112    
113    
114    Version 7.7 07-May-08
115  ---------------------  ---------------------
116    
117  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 212  Version 7.7 28-Apr-08
212      ncurses library to be included for pcretest when ReadLine support is      ncurses library to be included for pcretest when ReadLine support is
213      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
214      Daniel Bergström.      Daniel Bergström.
215    
216  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
217      as 0x00f00000 instead of 0x00800000. Luckily, this would not have caused      as 0x00f00000 instead of 0x00800000. Luckily, this would not have caused
218      any errors with the current Unicode tables. Thanks to Peter Kankowski for      any errors with the current Unicode tables. Thanks to Peter Kankowski for
219      spotting this.      spotting this.
220    
221    
222  Version 7.6 28-Jan-08  Version 7.6 28-Jan-08

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