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revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC revision 304 by ph10, Sun Jan 20 19:52:18 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 19-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.
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    
27    Version 7.5 10-Jan-08
28  ---------------------  ---------------------
29    
30  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 99  Version 7.5 12-Nov-07
99      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
100      non-matching lines.      non-matching lines.
101    
102  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
103    
104    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
105      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
106      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
107      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
108    
109  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
110      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
111      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
112    
113  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
114      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
115      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
116      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
117      caused the error; without that there was no problem.      caused the error; without that there was no problem.
118    
119  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
120    
121    19. Added --enable-pcretest-libreadline.
122    
123    20. In pcrecpp.cc, the variable 'count' was incremented twice in
124        RE::GlobalReplace(). As a result, the number of replacements returned was
125        double what it should be. I removed one of the increments, but Craig sent a
126        later patch that removed the other one (the right fix) and added unit tests
127        that check the return values (which was not done before).
128    
129    21. Several CMake things:
130    
131        (1) Arranged that, when cmake is used on Unix, the libraries end up with
132            the names libpcre and libpcreposix, not just pcre and pcreposix.
133    
134        (2) The above change means that pcretest and pcregrep are now correctly
135            linked with the newly-built libraries, not previously installed ones.
136    
137        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
138    
139    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
140        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
141        UTF-8 newline character). The key issue is that the pattern starts .*;
142        this means that the match must be either at the beginning, or after a
143        newline. The bug was in the code for advancing after a failed match and
144        checking that the new position followed a newline. It was not taking
145        account of UTF-8 characters correctly.
146    
147    23. PCRE was behaving differently from Perl in the way it recognized POSIX
148        character classes. PCRE was not treating the sequence [:...:] as a
149        character class unless the ... were all letters. Perl, however, seems to
150        allow any characters between [: and :], though of course it rejects as
151        unknown any "names" that contain non-letters, because all the known class
152        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
153        for example, whereas PCRE did not - it did not recognize a POSIX character
154        class. This seemed a bit dangerous, so the code has been changed to be
155        closer to Perl. The behaviour is not identical to Perl, because PCRE will
156        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
157        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
158        Perl does, and where it didn't before.
159    
160    24. Rewrite so as to remove the single use of %n from pcregrep because in some
161        Windows environments %n is disabled by default.
162    
163    
164  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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