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revision 160 by ph10, Wed May 2 10:58:35 2007 UTC revision 189 by ph10, Thu Jul 5 11:50:49 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.2 01-May-07  Version 7.3 05-Jul-07
5    ---------------------
6    
7     1. In the rejigging of the build system that eventually resulted in 7.1, the
8        line "#include <pcre.h>" was included in pcre_internal.h. The use of angle
9        brackets there is not right, since it causes compilers to look for an
10        installed pcre.h, not the version that is in the source that is being
11        compiled (which of course may be different). I have changed it back to:
12    
13          #include "pcre.h"
14    
15        I have a vague recollection that the change was concerned with compiling in
16        different directories, but in the new build system, that is taken care of
17        by the VPATH setting the Makefile.
18    
19    
20    
21    Version 7.2 19-Jun-07
22  ---------------------  ---------------------
23    
24   1. If the fr_FR locale cannot be found for test 3, try the "french" locale,   1. If the fr_FR locale cannot be found for test 3, try the "french" locale,
# Line 12  Version 7.2 01-May-07 Line 29  Version 7.2 01-May-07
29    
30   3. Add code to configure.ac to remove -g from the CFLAGS default settings.   3. Add code to configure.ac to remove -g from the CFLAGS default settings.
31    
32     4. Some of the "internals" tests were previously cut out when the link size
33        was not 2, because the output contained actual offsets. The recent new
34        "Z" feature of pcretest means that these can be cut out, making the tests
35        usable with all link sizes.
36    
37     5. Implemented Stan Switzer's goto replacement for longjmp() when not using
38        stack recursion. This gives a massive performance boost under BSD, but just
39        a small improvement under Linux. However, it saves one field in the frame
40        in all cases.
41    
42     6. Added more features from the forthcoming Perl 5.10:
43    
44        (a) (?-n) (where n is a string of digits) is a relative subroutine or
45            recursion call. It refers to the nth most recently opened parentheses.
46    
47        (b) (?+n) is also a relative subroutine call; it refers to the nth next
48            to be opened parentheses.
49    
50        (c) Conditions that refer to capturing parentheses can be specified
51            relatively, for example, (?(-2)... or (?(+3)...
52    
53        (d) \K resets the start of the current match so that everything before
54            is not part of it.
55    
56        (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
57    
58        (f) \g{name} is another synonym - part of Perl 5.10's unification of
59            reference syntax.
60    
61        (g) (?| introduces a group in which the numbering of parentheses in each
62            alternative starts with the same number.
63    
64        (h) \h, \H, \v, and \V match horizontal and vertical whitespace.
65    
66     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
67        PCRE_INFO_JCHANGED.
68    
69     8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not
70        terminating or by crashing. Diagnosed by Viktor Griph; it was in the code
71        for detecting groups that can match an empty string.
72    
73     9. A pattern with a very large number of alternatives (more than several
74        hundred) was running out of internal workspace during the pre-compile
75        phase, where pcre_compile() figures out how much memory will be needed. A
76        bit of new cunning has reduced the workspace needed for groups with
77        alternatives. The 1000-alternative test pattern now uses 12 bytes of
78        workspace instead of running out of the 4096 that are available.
79    
80    10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.
81    
82    11. Applied patch from Google to remove an optimization that didn't quite work.
83        The report of the bug said:
84    
85          pcrecpp::RE("a*").FullMatch("aaa") matches, while
86          pcrecpp::RE("a*?").FullMatch("aaa") does not, and
87          pcrecpp::RE("a*?\\z").FullMatch("aaa") does again.
88    
89    12. If \p or \P was used in non-UTF-8 mode on a character greater than 127
90        it matched the wrong number of bytes.
91    
92    
93  Version 7.1 24-Apr-07  Version 7.1 24-Apr-07
94  ---------------------  ---------------------

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