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revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC revision 303 by ph10, Sun Jan 20 19:39:43 2008 UTC
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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.
16    
17    
18    Version 7.5 10-Jan-08
19  ---------------------  ---------------------
20    
21  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 90  Version 7.5 12-Nov-07
90      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
91      non-matching lines.      non-matching lines.
92    
93  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
94    
95    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
96      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
97      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
98      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
99    
100  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
101      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
102      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
103    
104  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
105      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
106      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
107      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
108      caused the error; without that there was no problem.      caused the error; without that there was no problem.
109    
110  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
111    
112    19. Added --enable-pcretest-libreadline.
113    
114    20. In pcrecpp.cc, the variable 'count' was incremented twice in
115        RE::GlobalReplace(). As a result, the number of replacements returned was
116        double what it should be. I removed one of the increments, but Craig sent a
117        later patch that removed the other one (the right fix) and added unit tests
118        that check the return values (which was not done before).
119    
120    21. Several CMake things:
121    
122        (1) Arranged that, when cmake is used on Unix, the libraries end up with
123            the names libpcre and libpcreposix, not just pcre and pcreposix.
124    
125        (2) The above change means that pcretest and pcregrep are now correctly
126            linked with the newly-built libraries, not previously installed ones.
127    
128        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
129    
130    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
131        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
132        UTF-8 newline character). The key issue is that the pattern starts .*;
133        this means that the match must be either at the beginning, or after a
134        newline. The bug was in the code for advancing after a failed match and
135        checking that the new position followed a newline. It was not taking
136        account of UTF-8 characters correctly.
137    
138    23. PCRE was behaving differently from Perl in the way it recognized POSIX
139        character classes. PCRE was not treating the sequence [:...:] as a
140        character class unless the ... were all letters. Perl, however, seems to
141        allow any characters between [: and :], though of course it rejects as
142        unknown any "names" that contain non-letters, because all the known class
143        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
144        for example, whereas PCRE did not - it did not recognize a POSIX character
145        class. This seemed a bit dangerous, so the code has been changed to be
146        closer to Perl. The behaviour is not identical to Perl, because PCRE will
147        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
148        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
149        Perl does, and where it didn't before.
150    
151    24. Rewrite so as to remove the single use of %n from pcregrep because in some
152        Windows environments %n is disabled by default.
153    
154    
155  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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