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code/trunk/ChangeLog revision 733 by ph10, Tue Oct 11 10:29:36 2011 UTC code/branches/pcre16/ChangeLog revision 808 by ph10, Sun Dec 18 11:11:48 2011 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
4  Version 8.20 10-Oct-2011  Version 8.22
5    ------------
7    1.  Renamed "isnumber" as "is_a_number" because in some Mac environments this
8        name is defined in ctype.h.
10    2.  Fixed a bug in the code for calculating the fixed length of lookbehind
11        assertions.
14    Version 8.21 12-Dec-2011
15    ------------------------
17    1.  Updating the JIT compiler.
19    2.  JIT compiler now supports OP_NCREF, OP_RREF and OP_NRREF. New test cases
20        are added as well.
22    3.  Fix cache-flush issue on PowerPC (It is still an experimental JIT port).
23        PCRE_EXTRA_TABLES is not suported by JIT, and should be checked before
24        calling _pcre_jit_exec. Some extra comments are added.
26    4.  (*MARK) settings inside atomic groups that do not contain any capturing
27        parentheses, for example, (?>a(*:m)), were not being passed out. This bug
28        was introduced by change 18 for 8.20.
30    5.  Supporting of \x, \U and \u in JavaScript compatibility mode based on the
31        ECMA-262 standard.
33    6.  Lookbehinds such as (?<=a{2}b) that contained a fixed repetition were
34        erroneously being rejected as "not fixed length" if PCRE_CASELESS was set.
35        This bug was probably introduced by change 9 of 8.13.
37    7.  While fixing 6 above, I noticed that a number of other items were being
38        incorrectly rejected as "not fixed length". This arose partly because newer
39        opcodes had not been added to the fixed-length checking code. I have (a)
40        corrected the bug and added tests for these items, and (b) arranged for an
41        error to occur if an unknown opcode is encountered while checking for fixed
42        length instead of just assuming "not fixed length". The items that were
43        rejected were: (*ACCEPT), (*COMMIT), (*FAIL), (*MARK), (*PRUNE), (*SKIP),
44        (*THEN), \h, \H, \v, \V, and single character negative classes with fixed
45        repetitions, e.g. [^a]{3}, with and without PCRE_CASELESS.
47    8.  A possessively repeated conditional subpattern such as (?(?=c)c|d)++ was
48        being incorrectly compiled and would have given unpredicatble results.
50    9.  A possessively repeated subpattern with minimum repeat count greater than
51        one behaved incorrectly. For example, (A){2,}+ behaved as if it was
52        (A)(A)++ which meant that, after a subsequent mismatch, backtracking into
53        the first (A) could occur when it should not.
55    10. Add a cast and remove a redundant test from the code.
57    11. JIT should use pcre_malloc/pcre_free for allocation.
59    12. Updated pcre-config so that it no longer shows -L/usr/lib, which seems
60        best practice nowadays, and helps with cross-compiling. (If the exec_prefix
61        is anything other than /usr, -L is still shown).
63    13. In non-UTF-8 mode, \C is now supported in lookbehinds and DFA matching.
65    14. Perl does not support \N without a following name in a [] class; PCRE now
66        also gives an error.
68    15. If a forward reference was repeated with an upper limit of around 2000,
69        it caused the error "internal error: overran compiling workspace". The
70        maximum number of forward references (including repeats) was limited by the
71        internal workspace, and dependent on the LINK_SIZE. The code has been
72        rewritten so that the workspace expands (via pcre_malloc) if necessary, and
73        the default depends on LINK_SIZE. There is a new upper limit (for safety)
74        of around 200,000 forward references. While doing this, I also speeded up
75        the filling in of repeated forward references.
77    16. A repeated forward reference in a pattern such as (a)(?2){2}(.) was
78        incorrectly expecting the subject to contain another "a" after the start.
80    17. When (*SKIP:name) is activated without a corresponding (*MARK:name) earlier
81        in the match, the SKIP should be ignored. This was not happening; instead
82        the SKIP was being treated as NOMATCH. For patterns such as
83        /A(*MARK:A)A+(*SKIP:B)Z|AAC/ this meant that the AAC branch was never
84        tested.
86    18. The behaviour of (*MARK), (*PRUNE), and (*THEN) has been reworked and is
87        now much more compatible with Perl, in particular in cases where the result
88        is a non-match for a non-anchored pattern. For example, if
89        /b(*:m)f|a(*:n)w/ is matched against "abc", the non-match returns the name
90        "m", where previously it did not return a name. A side effect of this
91        change is that for partial matches, the last encountered mark name is
92        returned, as for non matches. A number of tests that were previously not
93        Perl-compatible have been moved into the Perl-compatible test files. The
94        refactoring has had the pleasing side effect of removing one argument from
95        the match() function, thus reducing its stack requirements.
97    19. If the /S+ option was used in pcretest to study a pattern using JIT,
98        subsequent uses of /S (without +) incorrectly behaved like /S+.
100    21. Retrieve executable code size support for the JIT compiler and fixing
101        some warnings.
103    22. A caseless match of a UTF-8 character whose other case uses fewer bytes did
104        not work when the shorter character appeared right at the end of the
105        subject string.
107    23. Added some (int) casts to non-JIT modules to reduce warnings on 64-bit
108        systems.
110    24. Added PCRE_INFO_JITSIZE to pass on the value from (21) above, and also
111        output it when the /M option is used in pcretest.
113    25. The CheckMan script was not being included in the distribution. Also, added
114        an explicit "perl" to run Perl scripts from the PrepareRelease script
115        because this is reportedly needed in Windows.
117    26. If study data was being save in a file and studying had not found a set of
118        "starts with" bytes for the pattern, the data written to the file (though
119        never used) was taken from uninitialized memory and so caused valgrind to
120        complain.
122    27. Updated RunTest.bat as provided by Sheri Pierce.
124    28. Fixed a possible uninitialized memory bug in pcre_jit_compile.c.
126    29. Computation of memory usage for the table of capturing group names was
127        giving an unnecessarily large value.
130    Version 8.20 21-Oct-2011
131  ------------------------  ------------------------
133  1.  Change 37 of 8.13 broke patterns like [:a]...[b:] because it thought it had  1.  Change 37 of 8.13 broke patterns like [:a]...[b:] because it thought it had
# Line 68  Version 8.20 10-Oct-2011 Line 194  Version 8.20 10-Oct-2011
195  12. In some environments, the output of pcretest -C is CRLF terminated. This  12. In some environments, the output of pcretest -C is CRLF terminated. This
196      broke RunTest's code that checks for the link size. A single white space      broke RunTest's code that checks for the link size. A single white space
197      after the value is now allowed for.      character after the value is now allowed for.
199  13. RunTest now checks for the "fr" locale as well as for "fr_FR" and "french".  13. RunTest now checks for the "fr" locale as well as for "fr_FR" and "french".
200      For "fr", it uses the Windows-specific input and output files.      For "fr", it uses the Windows-specific input and output files.
# Line 104  Version 8.20 10-Oct-2011 Line 230  Version 8.20 10-Oct-2011
230      suppress the check for a minimum subject length at run time. (If it was      suppress the check for a minimum subject length at run time. (If it was
231      given to pcre_exec() or pcre_dfa_exec() it did work.)      given to pcre_exec() or pcre_dfa_exec() it did work.)
233    20. Fixed an ASCII-dependent infelicity in pcretest that would have made it
234        fail to work when decoding hex characters in data strings in EBCDIC
235        environments.
237    21. It appears that in at least one Mac OS environment, the isxdigit() function
238        is implemented as a macro that evaluates to its argument more than once,
239        contravening the C 90 Standard (I haven't checked a later standard). There
240        was an instance in pcretest which caused it to go wrong when processing
241        \x{...} escapes in subject strings. The has been rewritten to avoid using
242        things like p++ in the argument of isxdigit().
245  Version 8.13 16-Aug-2011  Version 8.13 16-Aug-2011
246  ------------------------  ------------------------

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