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revision 288 by ph10, Wed Dec 19 12:21:45 2007 UTC revision 297 by ph10, Fri Jan 4 19:44:00 2008 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.5 12-Nov-07  Version 7.5 04-Jan-08
5  ---------------------  ---------------------
6    
7  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 76  Version 7.5 12-Nov-07
76      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
77      non-matching lines.      non-matching lines.
78    
79  14. The pattern (?=something)(?R) was not being diagnosed as a potentially  14. Added --file-offsets and --line-offsets to pcregrep.
80    
81    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
82      infinitely looping recursion. The bug was that positive lookaheads were not      infinitely looping recursion. The bug was that positive lookaheads were not
83      being skipped when checking for a possible empty match (negative lookaheads      being skipped when checking for a possible empty match (negative lookaheads
84      and both kinds of lookbehind were skipped).      and both kinds of lookbehind were skipped).
85    
86  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
87      inclusion of <windows.h> to before rather than after the definition of      inclusion of <windows.h> to before rather than after the definition of
88      INVALID_FILE_ATTRIBUTES (patch from David Byron).      INVALID_FILE_ATTRIBUTES (patch from David Byron).
89    
90  16. Specifying a possessive quantifier with a specific limit for a Unicode  17. Specifying a possessive quantifier with a specific limit for a Unicode
91      character property caused pcre_compile() to compile bad code, which led at      character property caused pcre_compile() to compile bad code, which led at
92      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this      runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
93      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
94      caused the error; without that there was no problem.      caused the error; without that there was no problem.
95    
96  17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.  18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
97    
98  18. Added --enable-pcretest-libreadline.  19. Added --enable-pcretest-libreadline.
99    
100  19. In pcrecpp.cc, the variable 'count' was incremented twice in  20. In pcrecpp.cc, the variable 'count' was incremented twice in
101      RE::GlobalReplace(). As a result, the number of replacements returned was      RE::GlobalReplace(). As a result, the number of replacements returned was
102      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
103        later patch that removed the other one (the right fix) and added unit tests
104        that check the return values (which was not done before).
105    
106    21. Several CMake things:
107    
108        (1) Arranged that, when cmake is used on Unix, the libraries end up with
109            the names libpcre and libpcreposix, not just pcre and pcreposix.
110    
111        (2) The above change means that pcretest and pcregrep are now correctly
112            linked with the newly-built libraries, not previously installed ones.
113    
114        (3) Added PCRE_SUPPORT_LIBREADLINE, PCRE_SUPPORT_LIBZ, PCRE_SUPPORT_LIBBZ2.
115    
116    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
117        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
118        UTF-8 newline character). The key issue is that the pattern starts .*;
119        this means that the match must be either at the beginning, or after a
120        newline. The bug was in the code for advancing after a failed match and
121        checking that the new position followed a newline. It was not taking
122        account of UTF-8 characters correctly.
123    
124    23. PCRE was behaving differently from Perl in the way it recognized POSIX
125        character classes. PCRE was not treating the sequence [:...:] as a
126        character class unless the ... were all letters. Perl, however, seems to
127        allow any characters between [: and :], though of course it rejects as
128        unknown any "names" that contain non-letters, because all the known class
129        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
130        for example, whereas PCRE did not - it did not recognize a POSIX character
131        class. This seemed a bit dangerous, so the code has been changed to be
132        closer to Perl. The behaviour is not identical to Perl, because PCRE will
133        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
134        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
135        Perl does, and where it didn't before.
136    
137    24. Rewrite so as to remove the single use of %n from pcregrep because in some
138        Windows environments %n is disabled by default.
139    
140    
141  Version 7.4 21-Sep-07  Version 7.4 21-Sep-07

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