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revision 807 by ph10, Sun Dec 18 10:03:38 2011 UTC revision 949 by zherczeg, Thu Mar 8 10:28:49 2012 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.22  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    13. As documented, (*COMMIT) is now confined to within a recursive subpattern
59        call.
60    
61    14. As documented, (*COMMIT) is now confined to within a positive assertion.
62    
63    15. It is now possible to link pcretest with libedit as an alternative to
64        libreadline.
65    
66    16. (*COMMIT) control verb is now supported by the JIT compiler.
67    
68    17. The Unicode data tables have been updated to Unicode 6.1.0.
69    
70    18. Added --file-list option to pcregrep.
71    
72    19. Added binary file support to pcregrep, including the -a, --binary-files,
73        -I, and --text options.
74    
75    20. The madvise function is renamed for posix_madvise for QNX compatibility
76        reasons. Fixed by Giuseppe D'Angelo.
77    
78    
79    Version 8.30 04-February-2012
80    -----------------------------
81    
82  1.  Renamed "isnumber" as "is_a_number" because in some Mac environments this  1.  Renamed "isnumber" as "is_a_number" because in some Mac environments this
83      name is defined in ctype.h.      name is defined in ctype.h.
84    
85  2.  Fixed a bug in the code for calculating the fixed length of lookbehind  2.  Fixed a bug in fixed-length calculation for lookbehinds that would show up
86        only in quite long subpatterns.
87    
88    3.  Removed the function pcre_info(), which has been obsolete and deprecated
89        since it was replaced by pcre_fullinfo() in February 2000.
90    
91    4.  For a non-anchored pattern, if (*SKIP) was given with a name that did not
92        match a (*MARK), and the match failed at the start of the subject, a
93        reference to memory before the start of the subject could occur. This bug
94        was introduced by fix 17 of release 8.21.
95    
96    5.  A reference to an unset group with zero minimum repetition was giving
97        totally wrong answers (in non-JavaScript-compatibility mode). For example,
98        /(another)?(\1?)test/ matched against "hello world test". This bug was
99        introduced in release 8.13.
100    
101    6.  Add support for 16-bit character strings (a large amount of work involving
102        many changes and refactorings).
103    
104    7.  RunGrepTest failed on msys because \r\n was replaced by whitespace when the
105        command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken
106        from a file.
107    
108    8.  Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size
109        rounding is not applied in this particular case).
110    
111    9.  The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected
112        if they appear, or are escaped, in patterns.
113    
114    10. Get rid of a number of -Wunused-but-set-variable warnings.
115    
116    11. The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark
117        "x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all.
118        Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern
119        also returns the mark "x". This bug applied to capturing parentheses,
120        non-capturing parentheses, and atomic parentheses. It also applied to some
121      assertions.      assertions.
122    
123    12. Stephen Kelly's patch to CMakeLists.txt allows it to parse the version
124        information out of configure.ac instead of relying on pcre.h.generic, which
125        is not stored in the repository.
126    
127    13. Applied Dmitry V. Levin's patch for a more portable method for linking with
128        -lreadline.
129    
130    14. ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C.
131    
132    15. Applied Graycode's patch to put the top-level frame on the stack rather
133        than the heap when not using the stack for recursion. This gives a
134        performance improvement in many cases when recursion is not deep.
135    
136    16. Experimental code added to "pcretest -C" to output the stack frame size.
137    
138    
139  Version 8.21 12-Dec-2011  Version 8.21 12-Dec-2011
140  ------------------------  ------------------------

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