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revision 288 by ph10, Wed Dec 19 12:21:45 2007 UTC revision 302 by ph10, Sun Jan 20 19:12:46 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    
15    Version 7.5 10-Jan-08
16  ---------------------  ---------------------
17    
18  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 87  Version 7.5 12-Nov-07
87      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
88      non-matching lines.      non-matching lines.
89    
90  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
91    
92    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
93      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
94      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
95      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
96    
97  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
98      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
99      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
100    
101  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
102      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
103      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
104      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
105      caused the error; without that there was no problem.      caused the error; without that there was no problem.
106    
107  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
108    
109  18. Added --enable-pcretest-libreadline.  19. Added --enable-pcretest-libreadline.
110    
111  19. In pcrecpp.cc, the variable 'count' was incremented twice in  20. In pcrecpp.cc, the variable 'count' was incremented twice in
112      RE::GlobalReplace(). As a result, the number of replacements returned was      RE::GlobalReplace(). As a result, the number of replacements returned was
113      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
114        later patch that removed the other one (the right fix) and added unit tests
115        that check the return values (which was not done before).
116    
117    21. Several CMake things:
118    
119        (1) Arranged that, when cmake is used on Unix, the libraries end up with
120            the names libpcre and libpcreposix, not just pcre and pcreposix.
121    
122        (2) The above change means that pcretest and pcregrep are now correctly
123            linked with the newly-built libraries, not previously installed ones.
124    
125        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
126    
127    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
128        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
129        UTF-8 newline character). The key issue is that the pattern starts .*;
130        this means that the match must be either at the beginning, or after a
131        newline. The bug was in the code for advancing after a failed match and
132        checking that the new position followed a newline. It was not taking
133        account of UTF-8 characters correctly.
134    
135    23. PCRE was behaving differently from Perl in the way it recognized POSIX
136        character classes. PCRE was not treating the sequence [:...:] as a
137        character class unless the ... were all letters. Perl, however, seems to
138        allow any characters between [: and :], though of course it rejects as
139        unknown any "names" that contain non-letters, because all the known class
140        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
141        for example, whereas PCRE did not - it did not recognize a POSIX character
142        class. This seemed a bit dangerous, so the code has been changed to be
143        closer to Perl. The behaviour is not identical to Perl, because PCRE will
144        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
145        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
146        Perl does, and where it didn't before.
147    
148    24. Rewrite so as to remove the single use of %n from pcregrep because in some
149        Windows environments %n is disabled by default.
150    
151    
152  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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