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revision 797 by ph10, Sun Dec 11 17:09:37 2011 UTC revision 933 by ph10, Sat Feb 25 12:18:23 2012 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4    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.  If JIT is requested using /S++ or -s++ (instead of just /S+ or -s+) when
37        running pcretest, the text "(JIT)" added to the output whenever JIT is
38        actually used to run the match.
39    
40    7.  Individual JIT compile options can be set in pcretest by following -s+[+]
41        or /S+[+] with a digit between 1 and 7.
42    
43    8.  OP_NOT now supports any UTF character not just single-byte ones.
44    
45    9.  (*MARK) control verb is now supported by the JIT compiler.
46    
47    10. The command "./RunTest list" lists the available tests without actually
48        running any of them. (Because I keep forgetting what they all are.)
49    
50    11. Add PCRE_INFO_MAXLOOKBEHIND.
51    
52    12. Applied a (slightly modified) user-supplied patch that improves performance
53        when the heap is used for recursion (compiled with --disable-stack-for-
54        recursion). Instead of malloc and free for each heap frame each time a
55        logical recursion happens, frames are retained on a chain and re-used where
56        possible. This sometimes gives as much as 30% improvement.
57    
58    
59    Version 8.30 04-February-2012
60    -----------------------------
61    
62    1.  Renamed "isnumber" as "is_a_number" because in some Mac environments this
63        name is defined in ctype.h.
64    
65    2.  Fixed a bug in fixed-length calculation for lookbehinds that would show up
66        only in quite long subpatterns.
67    
68    3.  Removed the function pcre_info(), which has been obsolete and deprecated
69        since it was replaced by pcre_fullinfo() in February 2000.
70    
71    4.  For a non-anchored pattern, if (*SKIP) was given with a name that did not
72        match a (*MARK), and the match failed at the start of the subject, a
73        reference to memory before the start of the subject could occur. This bug
74        was introduced by fix 17 of release 8.21.
75    
76    5.  A reference to an unset group with zero minimum repetition was giving
77        totally wrong answers (in non-JavaScript-compatibility mode). For example,
78        /(another)?(\1?)test/ matched against "hello world test". This bug was
79        introduced in release 8.13.
80    
81    6.  Add support for 16-bit character strings (a large amount of work involving
82        many changes and refactorings).
83    
84    7.  RunGrepTest failed on msys because \r\n was replaced by whitespace when the
85        command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken
86        from a file.
87    
88    8.  Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size
89        rounding is not applied in this particular case).
90    
91    9.  The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected
92        if they appear, or are escaped, in patterns.
93    
94    10. Get rid of a number of -Wunused-but-set-variable warnings.
95    
96    11. The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark
97        "x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all.
98        Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern
99        also returns the mark "x". This bug applied to capturing parentheses,
100        non-capturing parentheses, and atomic parentheses. It also applied to some
101        assertions.
102    
103    12. Stephen Kelly's patch to CMakeLists.txt allows it to parse the version
104        information out of configure.ac instead of relying on pcre.h.generic, which
105        is not stored in the repository.
106    
107    13. Applied Dmitry V. Levin's patch for a more portable method for linking with
108        -lreadline.
109    
110    14. ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C.
111    
112    15. Applied Graycode's patch to put the top-level frame on the stack rather
113        than the heap when not using the stack for recursion. This gives a
114        performance improvement in many cases when recursion is not deep.
115    
116    16. Experimental code added to "pcretest -C" to output the stack frame size.
117    
118    
119  Version 8.21 12-Dec-2011  Version 8.21 12-Dec-2011
120  ------------------------  ------------------------
121    

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