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revision 793 by ph10, Wed Dec 7 16:52:34 2011 UTC revision 922 by ph10, Mon Feb 20 18:44:42 2012 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.21 05-Dec-2011  Version 8.31
5    -----------------------------
6    
7    1.  Fixing a wrong JIT test case and some compiler warnings.
8    
9    2.  Removed a bashism from the RunTest script.
10    
11    3.  Add a cast to pcre_exec.c to fix the warning "unary minus operator applied
12        to unsigned type, result still unsigned" that was given by an MS compiler
13        on encountering the code "-sizeof(xxx)".
14    
15    4.  Partial matching support is added to the JIT compiler.
16    
17    5.  Fixed several bugs concerned with partial matching of items that consist
18        of more than one character:
19    
20        (a) /^(..)\1/ did not partially match "aba" because checking references was
21            done on an "all or nothing" basis. This also applied to repeated
22            references.
23    
24        (b) \R did not give a hard partial match if \r was found at the end of the
25            subject.
26    
27        (c) \X did not give a hard partial match after matching one or more
28            characters at the end of the subject.
29    
30        (d) When newline was set to CRLF, a pattern such as /a$/ did not recognize
31            a partial match for the string "\r".
32    
33        (e) When newline was set to CRLF, the metacharacter "." did not recognize
34            a partial match for a CR character at the end of the subject string.
35    
36    6.  When matching is performed using JIT-compiled code, the flag bit
37        PCRE_EXTRA_USED_JIT is set in the pcre_extra block and can be tested by the
38        caller. This bit is checked by pcretest if JIT is requested by /S++ or -s++
39        (instead of just /S+ or -s+) and the text "(JIT)" added to the output if
40        the bit is set.
41    
42    
43    Version 8.30 04-February-2012
44    -----------------------------
45    
46    1.  Renamed "isnumber" as "is_a_number" because in some Mac environments this
47        name is defined in ctype.h.
48    
49    2.  Fixed a bug in fixed-length calculation for lookbehinds that would show up
50        only in quite long subpatterns.
51    
52    3.  Removed the function pcre_info(), which has been obsolete and deprecated
53        since it was replaced by pcre_fullinfo() in February 2000.
54    
55    4.  For a non-anchored pattern, if (*SKIP) was given with a name that did not
56        match a (*MARK), and the match failed at the start of the subject, a
57        reference to memory before the start of the subject could occur. This bug
58        was introduced by fix 17 of release 8.21.
59    
60    5.  A reference to an unset group with zero minimum repetition was giving
61        totally wrong answers (in non-JavaScript-compatibility mode). For example,
62        /(another)?(\1?)test/ matched against "hello world test". This bug was
63        introduced in release 8.13.
64    
65    6.  Add support for 16-bit character strings (a large amount of work involving
66        many changes and refactorings).
67    
68    7.  RunGrepTest failed on msys because \r\n was replaced by whitespace when the
69        command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken
70        from a file.
71    
72    8.  Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size
73        rounding is not applied in this particular case).
74    
75    9.  The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected
76        if they appear, or are escaped, in patterns.
77    
78    10. Get rid of a number of -Wunused-but-set-variable warnings.
79    
80    11. The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark
81        "x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all.
82        Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern
83        also returns the mark "x". This bug applied to capturing parentheses,
84        non-capturing parentheses, and atomic parentheses. It also applied to some
85        assertions.
86    
87    12. Stephen Kelly's patch to CMakeLists.txt allows it to parse the version
88        information out of configure.ac instead of relying on pcre.h.generic, which
89        is not stored in the repository.
90    
91    13. Applied Dmitry V. Levin's patch for a more portable method for linking with
92        -lreadline.
93    
94    14. ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C.
95    
96    15. Applied Graycode's patch to put the top-level frame on the stack rather
97        than the heap when not using the stack for recursion. This gives a
98        performance improvement in many cases when recursion is not deep.
99    
100    16. Experimental code added to "pcretest -C" to output the stack frame size.
101    
102    
103    Version 8.21 12-Dec-2011
104  ------------------------  ------------------------
105    
106  1.  Updating the JIT compiler.  1.  Updating the JIT compiler.
# Line 103  Version 8.21 05-Dec-2011 Line 202  Version 8.21 05-Dec-2011
202  25. The CheckMan script was not being included in the distribution. Also, added  25. The CheckMan script was not being included in the distribution. Also, added
203      an explicit "perl" to run Perl scripts from the PrepareRelease script      an explicit "perl" to run Perl scripts from the PrepareRelease script
204      because this is reportedly needed in Windows.      because this is reportedly needed in Windows.
205    
206  26. If study data was being save in a file and studying had not found a set of  26. If study data was being save in a file and studying had not found a set of
207      "starts with" bytes for the pattern, the data written to the file (though      "starts with" bytes for the pattern, the data written to the file (though
208      never used) was taken from uninitialized memory and so caused valgrind to      never used) was taken from uninitialized memory and so caused valgrind to
209      complain.      complain.
210    
211  27. Updated RunTest.bat as provided by Sheri Pierce.  27. Updated RunTest.bat as provided by Sheri Pierce.
212    
213  28. Fixed a possible uninitialized memory bug in pcre_jit_compile.c.  28. Fixed a possible uninitialized memory bug in pcre_jit_compile.c.
214    

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