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revision 513 by ph10, Mon May 3 11:13:37 2010 UTC revision 550 by ph10, Sun Oct 10 16:24:11 2010 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.10 03 May-2010  Version 8.11 10-Oct-2010
5    ------------------------
6    
7    1.  (*THEN) was not working properly if there were untried alternatives prior
8        to it in the current branch. For example, in ((a|b)(*THEN)(*F)|c..) it
9        backtracked to try for "b" instead of moving to the next alternative branch
10        at the same level (in this case, to look for "c"). The Perl documentation
11        is clear that when (*THEN) is backtracked onto, it goes to the "next
12        alternative in the innermost enclosing group".
13    
14    
15    Version 8.10 25-Jun-2010
16  ------------------------  ------------------------
17    
18  1.  Added support for (*MARK:ARG) and for ARG additions to PRUNE, SKIP, and  1.  Added support for (*MARK:ARG) and for ARG additions to PRUNE, SKIP, and
# Line 9  Version 8.10 03 May-2010 Line 20  Version 8.10 03 May-2010
20    
21  2.  (*ACCEPT) was not working when inside an atomic group.  2.  (*ACCEPT) was not working when inside an atomic group.
22    
23  3.  Inside a character class, \B is treated as a literal by default, but  3.  Inside a character class, \B is treated as a literal by default, but
24      faulted if PCRE_EXTRA is set. This mimics Perl's behaviour (the -w option      faulted if PCRE_EXTRA is set. This mimics Perl's behaviour (the -w option
25      causes the error). The code is unchanged, but I tidied the documentation.      causes the error). The code is unchanged, but I tidied the documentation.
26    
27  4.  Inside a character class, PCRE always treated \R and \X as literals,  4.  Inside a character class, PCRE always treated \R and \X as literals,
28      whereas Perl faults them if its -w option is set. I have changed PCRE so      whereas Perl faults them if its -w option is set. I have changed PCRE so
29      that it faults them when PCRE_EXTRA is set.      that it faults them when PCRE_EXTRA is set.
30    
31    5.  Added support for \N, which always matches any character other than
32        newline. (It is the same as "." when PCRE_DOTALL is not set.)
33    
34    6.  When compiling pcregrep with newer versions of gcc which may have
35        FORTIFY_SOURCE set, several warnings "ignoring return value of 'fwrite',
36        declared with attribute warn_unused_result" were given. Just casting the
37        result to (void) does not stop the warnings; a more elaborate fudge is
38        needed. I've used a macro to implement this.
39    
40    7.  Minor change to pcretest.c to avoid a compiler warning.
41    
42    8.  Added four artifical Unicode properties to help with an option to make
43        \s etc use properties (see next item). The new properties are: Xan
44        (alphanumeric), Xsp (Perl space), Xps (POSIX space), and Xwd (word).
45    
46    9.  Added PCRE_UCP to make \b, \d, \s, \w, and certain POSIX character classes
47        use Unicode properties. (*UCP) at the start of a pattern can be used to set
48        this option. Modified pcretest to add /W to test this facility. Added
49        REG_UCP to make it available via the POSIX interface.
50    
51    10. Added --line-buffered to pcregrep.
52    
53    11. In UTF-8 mode, if a pattern that was compiled with PCRE_CASELESS was
54        studied, and the match started with a letter with a code point greater than
55        127 whose first byte was different to the first byte of the other case of
56        the letter, the other case of this starting letter was not recognized
57        (#976).
58    
59    12. If a pattern that was studied started with a repeated Unicode property
60        test, for example, \p{Nd}+, there was the theoretical possibility of
61        setting up an incorrect bitmap of starting bytes, but fortunately it could
62        not have actually happened in practice until change 8 above was made (it
63        added property types that matched character-matching opcodes).
64    
65    13. pcre_study() now recognizes \h, \v, and \R when constructing a bit map of
66        possible starting bytes for non-anchored patterns.
67    
68    14. Extended the "auto-possessify" feature of pcre_compile(). It now recognizes
69        \R, and also a number of cases that involve Unicode properties, both
70        explicit and implicit when PCRE_UCP is set.
71    
72    15. If a repeated Unicode property match (e.g. \p{Lu}*) was used with non-UTF-8
73        input, it could crash or give wrong results if characters with values
74        greater than 0xc0 were present in the subject string. (Detail: it assumed
75        UTF-8 input when processing these items.)
76    
77    16. Added a lot of (int) casts to avoid compiler warnings in systems where
78        size_t is 64-bit (#991).
79    
80    17. Added a check for running out of memory when PCRE is compiled with
81        --disable-stack-for-recursion (#990).
82    
83    18. If the last data line in a file for pcretest does not have a newline on
84        the end, a newline was missing in the output.
85    
86    19. The default pcre_chartables.c file recognizes only ASCII characters (values
87        less than 128) in its various bitmaps. However, there is a facility for
88        generating tables according to the current locale when PCRE is compiled. It
89        turns out that in some environments, 0x85 and 0xa0, which are Unicode space
90        characters, are recognized by isspace() and therefore were getting set in
91        these tables, and indeed these tables seem to approximate to ISO 8859. This
92        caused a problem in UTF-8 mode when pcre_study() was used to create a list
93        of bytes that can start a match. For \s, it was including 0x85 and 0xa0,
94        which of course cannot start UTF-8 characters. I have changed the code so
95        that only real ASCII characters (less than 128) and the correct starting
96        bytes for UTF-8 encodings are set for characters greater than 127 when in
97        UTF-8 mode. (When PCRE_UCP is set - see 9 above - the code is different
98        altogether.)
99    
100    20. Added the /T option to pcretest so as to be able to run tests with non-
101        standard character tables, thus making it possible to include the tests
102        used for 19 above in the standard set of tests.
103    
104    21. A pattern such as (?&t)(?#()(?(DEFINE)(?<t>a)) which has a forward
105        reference to a subpattern the other side of a comment that contains an
106        opening parenthesis caused either an internal compiling error, or a
107        reference to the wrong subpattern.
108    
109    
110  Version 8.02 19-Mar-2010  Version 8.02 19-Mar-2010
111  ------------------------  ------------------------

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