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revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC revision 314 by ph10, Fri Jan 25 17:09:21 2008 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.5 12-Nov-07  Version 7.6 21-Jan-08
5    ---------------------
6    
7    1.  A character class containing a very large number of characters with
8        codepoints greater than 255 (in UTF-8 mode, of course) caused a buffer
9        overflow.
10    
11    2.  Patch to cut out the "long long" test in pcrecpp_unittest when
12        HAVE_LONG_LONG is not defined.
13    
14    3.  Applied Christian Ehrlicher's patch to update the CMake build files to
15        bring them up to date and include new features. This patch includes:
16    
17        - Fixed PH's badly added libz and libbz2 support.
18        - Fixed a problem with static linking.
19        - Added pcredemo. [But later removed - see 7 below.]
20        - Fixed dftables problem and added an option.
21        - Added a number of HAVE_XXX tests, including HAVE_WINDOWS_H and
22            HAVE_LONG_LONG.
23        - Added readline support for pcretest.
24        - Added an listing of the option settings after cmake has run.
25    
26    4.  A user submitted a patch to Makefile that makes it easy to create
27        "pcre.dll" under mingw when using Configure/Make. I added stuff to
28        Makefile.am that cause it to include this special target, without
29        affecting anything else. Note that the same mingw target plus all
30        the other distribution libraries and programs are now supported
31        when configuring with CMake (see 6 below) instead of with
32        Configure/Make.
33    
34    5.  Applied Craig's patch that moves no_arg into the RE class in the C++ code.
35        This is an attempt to solve the reported problem "pcrecpp::no_arg is not
36        exported in the Windows port". It has not yet been confirmed that the patch
37        solves the problem, but it does no harm.
38    
39    6.  Applied Sheri's patch to CMakeLists.txt to add NON_STANDARD_LIB_PREFIX and
40        NON_STANDARD_LIB_SUFFIX for dll names built with mingw when configured
41        with CMake, and also correct the comment about stack recursion.
42    
43    7.  Remove the automatic building of pcredemo from the ./configure system and
44        from CMakeLists.txt. The whole idea of pcredemo.c is that it is an example
45        of a program that users should build themselves after PCRE is installed, so
46        building it automatically is not really right. What is more, it gave
47        trouble in some build environments.
48    
49    
50    Version 7.5 10-Jan-08
51  ---------------------  ---------------------
52    
53  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 122  Version 7.5 12-Nov-07
122      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
123      non-matching lines.      non-matching lines.
124    
125  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
126    
127    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
128      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
129      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
130      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
131    
132  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
133      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
134      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
135    
136  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
137      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
138      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
139      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
140      caused the error; without that there was no problem.      caused the error; without that there was no problem.
141    
142  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
143    
144    19. Added --enable-pcretest-libreadline.
145    
146    20. In pcrecpp.cc, the variable 'count' was incremented twice in
147        RE::GlobalReplace(). As a result, the number of replacements returned was
148        double what it should be. I removed one of the increments, but Craig sent a
149        later patch that removed the other one (the right fix) and added unit tests
150        that check the return values (which was not done before).
151    
152    21. Several CMake things:
153    
154        (1) Arranged that, when cmake is used on Unix, the libraries end up with
155            the names libpcre and libpcreposix, not just pcre and pcreposix.
156    
157        (2) The above change means that pcretest and pcregrep are now correctly
158            linked with the newly-built libraries, not previously installed ones.
159    
160        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
161    
162    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
163        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
164        UTF-8 newline character). The key issue is that the pattern starts .*;
165        this means that the match must be either at the beginning, or after a
166        newline. The bug was in the code for advancing after a failed match and
167        checking that the new position followed a newline. It was not taking
168        account of UTF-8 characters correctly.
169    
170    23. PCRE was behaving differently from Perl in the way it recognized POSIX
171        character classes. PCRE was not treating the sequence [:...:] as a
172        character class unless the ... were all letters. Perl, however, seems to
173        allow any characters between [: and :], though of course it rejects as
174        unknown any "names" that contain non-letters, because all the known class
175        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
176        for example, whereas PCRE did not - it did not recognize a POSIX character
177        class. This seemed a bit dangerous, so the code has been changed to be
178        closer to Perl. The behaviour is not identical to Perl, because PCRE will
179        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
180        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
181        Perl does, and where it didn't before.
182    
183    24. Rewrite so as to remove the single use of %n from pcregrep because in some
184        Windows environments %n is disabled by default.
185    
186    
187  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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