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revision 288 by ph10, Wed Dec 19 12:21:45 2007 UTC revision 300 by ph10, Mon Jan 14 19:43:19 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 14-Jan-08
5    ---------------------
6    
7    1.  A class with a very large number of characters with codepoints greater
8        than 255 (in UTF-8 mode, of course), caused a buffer overflow.
9    
10    
11    Version 7.5 10-Jan-08
12  ---------------------  ---------------------
13    
14  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 83  Version 7.5 12-Nov-07
83      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
84      non-matching lines.      non-matching lines.
85    
86  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
87    
88    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
89      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
90      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
91      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
92    
93  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
94      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
95      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
96    
97  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
98      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
99      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
100      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
101      caused the error; without that there was no problem.      caused the error; without that there was no problem.
102    
103  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
104    
105  18. Added --enable-pcretest-libreadline.  19. Added --enable-pcretest-libreadline.
106    
107  19. In pcrecpp.cc, the variable 'count' was incremented twice in  20. In pcrecpp.cc, the variable 'count' was incremented twice in
108      RE::GlobalReplace(). As a result, the number of replacements returned was      RE::GlobalReplace(). As a result, the number of replacements returned was
109      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
110        later patch that removed the other one (the right fix) and added unit tests
111        that check the return values (which was not done before).
112    
113    21. Several CMake things:
114    
115        (1) Arranged that, when cmake is used on Unix, the libraries end up with
116            the names libpcre and libpcreposix, not just pcre and pcreposix.
117    
118        (2) The above change means that pcretest and pcregrep are now correctly
119            linked with the newly-built libraries, not previously installed ones.
120    
121        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
122    
123    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
124        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
125        UTF-8 newline character). The key issue is that the pattern starts .*;
126        this means that the match must be either at the beginning, or after a
127        newline. The bug was in the code for advancing after a failed match and
128        checking that the new position followed a newline. It was not taking
129        account of UTF-8 characters correctly.
130    
131    23. PCRE was behaving differently from Perl in the way it recognized POSIX
132        character classes. PCRE was not treating the sequence [:...:] as a
133        character class unless the ... were all letters. Perl, however, seems to
134        allow any characters between [: and :], though of course it rejects as
135        unknown any "names" that contain non-letters, because all the known class
136        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
137        for example, whereas PCRE did not - it did not recognize a POSIX character
138        class. This seemed a bit dangerous, so the code has been changed to be
139        closer to Perl. The behaviour is not identical to Perl, because PCRE will
140        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
141        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
142        Perl does, and where it didn't before.
143    
144    24. Rewrite so as to remove the single use of %n from pcregrep because in some
145        Windows environments %n is disabled by default.
146    
147    
148  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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