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revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC revision 328 by ph10, Wed Mar 26 17:39:06 2008 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.5 12-Nov-07  Version 7.7 05-Mar-08
5    ---------------------
6    
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.
10    
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.
14    
15    3.  Remove a line of dead code, identified by coverity and reported by Nuno
16        Lopes.
17    
18    4.  Fixed two related pcregrep bugs involving -r with --include or --exclude:
19    
20        (1) The include/exclude patterns were being applied to the whole pathnames
21            of files, instead of just to the final components.
22    
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.
29    
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.
32    
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.
36    
37    7.  Added some missing "const"s to declarations of static tables in
38        pcre_compile.c and pcre_dfa_exec.c.
39    
40    8.  Applied Craig's patch to pcrecpp.cc to fix a problem in OS X that was
41        caused by fix #2  above.
42    
43    
44    Version 7.6 28-Jan-08
45    ---------------------
46    
47    1.  A character class containing a very large number of characters with
48        codepoints greater than 255 (in UTF-8 mode, of course) caused a buffer
49        overflow.
50    
51    2.  Patch to cut out the "long long" test in pcrecpp_unittest when
52        HAVE_LONG_LONG is not defined.
53    
54    3.  Applied Christian Ehrlicher's patch to update the CMake build files to
55        bring them up to date and include new features. This patch includes:
56    
57        - Fixed PH's badly added libz and libbz2 support.
58        - Fixed a problem with static linking.
59        - Added pcredemo. [But later removed - see 7 below.]
60        - Fixed dftables problem and added an option.
61        - Added a number of HAVE_XXX tests, including HAVE_WINDOWS_H and
62            HAVE_LONG_LONG.
63        - Added readline support for pcretest.
64        - Added an listing of the option settings after cmake has run.
65    
66    4.  A user submitted a patch to Makefile that makes it easy to create
67        "pcre.dll" under mingw when using Configure/Make. I added stuff to
68        Makefile.am that cause it to include this special target, without
69        affecting anything else. Note that the same mingw target plus all
70        the other distribution libraries and programs are now supported
71        when configuring with CMake (see 6 below) instead of with
72        Configure/Make.
73    
74    5.  Applied Craig's patch that moves no_arg into the RE class in the C++ code.
75        This is an attempt to solve the reported problem "pcrecpp::no_arg is not
76        exported in the Windows port". It has not yet been confirmed that the patch
77        solves the problem, but it does no harm.
78    
79    6.  Applied Sheri's patch to CMakeLists.txt to add NON_STANDARD_LIB_PREFIX and
80        NON_STANDARD_LIB_SUFFIX for dll names built with mingw when configured
81        with CMake, and also correct the comment about stack recursion.
82    
83    7.  Remove the automatic building of pcredemo from the ./configure system and
84        from CMakeLists.txt. The whole idea of pcredemo.c is that it is an example
85        of a program that users should build themselves after PCRE is installed, so
86        building it automatically is not really right. What is more, it gave
87        trouble in some build environments.
88    
89    8.  Further tidies to CMakeLists.txt from Sheri and Christian.
90    
91    
92    Version 7.5 10-Jan-08
93  ---------------------  ---------------------
94    
95  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 76  Version 7.5 12-Nov-07 Line 164  Version 7.5 12-Nov-07
164      does the same. The return code can be used to tell if there were any      does the same. The return code can be used to tell if there were any
165      non-matching lines.      non-matching lines.
166    
167  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
168    
169    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
170      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
171      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
172      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
173    
174  15. Fixed two typos in the Windows-only code in pcregrep.c, and moved the  16. Fixed two typos in the Windows-only code in pcregrep.c, and moved the
175      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
176      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
177    
178  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
179      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
180      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
181      are: /\p{Zl}{2,3}+/8 and /\p{Cc}{2}+/8. It was the possessive "+" that      are: /\p{Zl}{2,3}+/8 and /\p{Cc}{2}+/8. It was the possessive "+" that
182      caused the error; without that there was no problem.      caused the error; without that there was no problem.
183    
184  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
185    
186    19. Added --enable-pcretest-libreadline.
187    
188    20. In pcrecpp.cc, the variable 'count' was incremented twice in
189        RE::GlobalReplace(). As a result, the number of replacements returned was
190        double what it should be. I removed one of the increments, but Craig sent a
191        later patch that removed the other one (the right fix) and added unit tests
192        that check the return values (which was not done before).
193    
194    21. Several CMake things:
195    
196        (1) Arranged that, when cmake is used on Unix, the libraries end up with
197            the names libpcre and libpcreposix, not just pcre and pcreposix.
198    
199        (2) The above change means that pcretest and pcregrep are now correctly
200            linked with the newly-built libraries, not previously installed ones.
201    
202        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
203    
204    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
205        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
206        UTF-8 newline character). The key issue is that the pattern starts .*;
207        this means that the match must be either at the beginning, or after a
208        newline. The bug was in the code for advancing after a failed match and
209        checking that the new position followed a newline. It was not taking
210        account of UTF-8 characters correctly.
211    
212    23. PCRE was behaving differently from Perl in the way it recognized POSIX
213        character classes. PCRE was not treating the sequence [:...:] as a
214        character class unless the ... were all letters. Perl, however, seems to
215        allow any characters between [: and :], though of course it rejects as
216        unknown any "names" that contain non-letters, because all the known class
217        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
218        for example, whereas PCRE did not - it did not recognize a POSIX character
219        class. This seemed a bit dangerous, so the code has been changed to be
220        closer to Perl. The behaviour is not identical to Perl, because PCRE will
221        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
222        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
223        Perl does, and where it didn't before.
224    
225    24. Rewrite so as to remove the single use of %n from pcregrep because in some
226        Windows environments %n is disabled by default.
227    
228    
229  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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