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revision 292 by ph10, Thu Dec 27 09:27:23 2007 UTC revision 340 by ph10, Fri Apr 18 20:00:21 2008 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
4  Version 7.5 27-Dec-07  Version 7.7 05-Mar-08
5    ---------------------
7    1.  Applied Craig's patch to sort out a long long problem: "If we can't convert
8        a string to a long long, pretend we don't even have a long long." This is
9        done by checking for the strtoq, strtoll, and _strtoi64 functions.
11    2.  Applied Craig's patch to pcrecpp.cc to restore ABI compatibility with
12        pre-7.6 versions, which defined a global no_arg variable instead of putting
13        it in the RE class. (See also #8 below.)
15    3.  Remove a line of dead code, identified by coverity and reported by Nuno
16        Lopes.
18    4.  Fixed two related pcregrep bugs involving -r with --include or --exclude:
20        (1) The include/exclude patterns were being applied to the whole pathnames
21            of files, instead of just to the final components.
23        (2) If there was more than one level of directory, the subdirectories were
24            skipped unless they satisfied the include/exclude conditions. This is
25            inconsistent with GNU grep (and could even be seen as contrary to the
26            pcregrep specification - which I improved to make it absolutely clear).
27            The action now is always to scan all levels of directory, and just
28            apply the include/exclude patterns to regular files.
30    5.  Added the --include_dir and --exclude_dir patterns to pcregrep, and used
31        --exclude_dir in the tests to avoid scanning .svn directories.
33    6.  Applied Craig's patch to the QuoteMeta function so that it escapes the
34        NUL character as backslash + 0 rather than backslash + NUL, because PCRE
35        doesn't support NULs in patterns.
37    7.  Added some missing "const"s to declarations of static tables in
38        pcre_compile.c and pcre_dfa_exec.c.
40    8.  Applied Craig's patch to pcrecpp.cc to fix a problem in OS X that was
41        caused by fix #2  above. (Subsequently also a second patch to fix the
42        first patch. And a third patch - this was a messy problem.)
44    9.  Applied Craig's patch to remove the use of push_back().
46    10. Applied Alan Lehotsky's patch to add REG_STARTEND support to the POSIX
47        matching function regexec().
49    11. Added support for the Oniguruma syntax \g<name>, \g<n>, \g'name', \g'n',
50        which, however, unlike Perl's \g{...}, are subroutine calls, not back
51        references. PCRE supports relative numbers with this syntax (I don't think
52        Oniguruma does).
54    12. Previously, a group with a zero repeat such as (...){0} was completely
55        omitted from the compiled regex. However, this means that if the group
56        was called as a subroutine from elsewhere in the pattern, things went wrong
57        (an internal error was given). Such groups are now left in the compiled
58        pattern, with a new opcode that causes them to be skipped at execution
59        time.
61    13. Added the PCRE_JAVASCRIPT_COMPAT option. This currently does two things:
62        (a) A lone ] character is dis-allowed (Perl treats it as data).
63        (b) A back reference to an unmatched subpattern matches an empty string
64            (Perl fails the current match path).
66    14. A pattern such as /(?2)[]a()b](abc)/ which had a forward reference to a
67        non-existent subpattern following a character class starting with ']' and
68        containing () gave an internal compiling error instead of "reference to
69        non-existent subpattern". Fortunately, when the pattern did exist, the
70        compiled code was correct. (When scanning forwards to check for the
71        existencd of the subpattern, it was treating the data ']' as terminating
72        the class, so got the count wrong. When actually compiling, the reference
73        was subsequently set up correctly.)
76    Version 7.6 28-Jan-08
77    ---------------------
79    1.  A character class containing a very large number of characters with
80        codepoints greater than 255 (in UTF-8 mode, of course) caused a buffer
81        overflow.
83    2.  Patch to cut out the "long long" test in pcrecpp_unittest when
84        HAVE_LONG_LONG is not defined.
86    3.  Applied Christian Ehrlicher's patch to update the CMake build files to
87        bring them up to date and include new features. This patch includes:
89        - Fixed PH's badly added libz and libbz2 support.
90        - Fixed a problem with static linking.
91        - Added pcredemo. [But later removed - see 7 below.]
92        - Fixed dftables problem and added an option.
93        - Added a number of HAVE_XXX tests, including HAVE_WINDOWS_H and
94            HAVE_LONG_LONG.
95        - Added readline support for pcretest.
96        - Added an listing of the option settings after cmake has run.
98    4.  A user submitted a patch to Makefile that makes it easy to create
99        "pcre.dll" under mingw when using Configure/Make. I added stuff to
100        Makefile.am that cause it to include this special target, without
101        affecting anything else. Note that the same mingw target plus all
102        the other distribution libraries and programs are now supported
103        when configuring with CMake (see 6 below) instead of with
104        Configure/Make.
106    5.  Applied Craig's patch that moves no_arg into the RE class in the C++ code.
107        This is an attempt to solve the reported problem "pcrecpp::no_arg is not
108        exported in the Windows port". It has not yet been confirmed that the patch
109        solves the problem, but it does no harm.
111    6.  Applied Sheri's patch to CMakeLists.txt to add NON_STANDARD_LIB_PREFIX and
112        NON_STANDARD_LIB_SUFFIX for dll names built with mingw when configured
113        with CMake, and also correct the comment about stack recursion.
115    7.  Remove the automatic building of pcredemo from the ./configure system and
116        from CMakeLists.txt. The whole idea of pcredemo.c is that it is an example
117        of a program that users should build themselves after PCRE is installed, so
118        building it automatically is not really right. What is more, it gave
119        trouble in some build environments.
121    8.  Further tidies to CMakeLists.txt from Sheri and Christian.
124    Version 7.5 10-Jan-08
125  ---------------------  ---------------------
127  1.  Applied a patch from Craig: "This patch makes it possible to 'ignore'  1.  Applied a patch from Craig: "This patch makes it possible to 'ignore'
# Line 99  Version 7.5 27-Dec-07 Line 219  Version 7.5 27-Dec-07
220  20. In pcrecpp.cc, the variable 'count' was incremented twice in  20. In pcrecpp.cc, the variable 'count' was incremented twice in
221      RE::GlobalReplace(). As a result, the number of replacements returned was      RE::GlobalReplace(). As a result, the number of replacements returned was
222      double what it should be. I have removed one of the increments.      double what it should be. I removed one of the increments, but Craig sent a
223        later patch that removed the other one (the right fix) and added unit tests
224        that check the return values (which was not done before).
226  21. Several CMake things:  21. Several CMake things:
# Line 111  Version 7.5 27-Dec-07 Line 233  Version 7.5 27-Dec-07
236    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
237        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
238        UTF-8 newline character). The key issue is that the pattern starts .*;
239        this means that the match must be either at the beginning, or after a
240        newline. The bug was in the code for advancing after a failed match and
241        checking that the new position followed a newline. It was not taking
242        account of UTF-8 characters correctly.
244    23. PCRE was behaving differently from Perl in the way it recognized POSIX
245        character classes. PCRE was not treating the sequence [:...:] as a
246        character class unless the ... were all letters. Perl, however, seems to
247        allow any characters between [: and :], though of course it rejects as
248        unknown any "names" that contain non-letters, because all the known class
249        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
250        for example, whereas PCRE did not - it did not recognize a POSIX character
251        class. This seemed a bit dangerous, so the code has been changed to be
252        closer to Perl. The behaviour is not identical to Perl, because PCRE will
253        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
254        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
255        Perl does, and where it didn't before.
257    24. Rewrite so as to remove the single use of %n from pcregrep because in some
258        Windows environments %n is disabled by default.
261  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07
262  ---------------------  ---------------------

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