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revision 161 by ph10, Thu May 3 10:28:07 2007 UTC revision 192 by ph10, Mon Jul 30 11:23:21 2007 UTC
# Line 1  Line 1 
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     2. The pattern .*$ when run in not-DOTALL UTF-8 mode with newline=any failed
20        when the subject happened to end in the byte 0x85 (e.g. if the last
21        character was \x{1ec5}). *Character* 0x85 is one of the "any" newline
22        characters but of course it shouldn't be taken as a newline when it is part
23        of another character. The bug was that, for an unlimited repeat of . in
24        not-DOTALL UTF-8 mode, PCRE was advancing by bytes rather than by
25        characters when looking for a newline.
26    
27     3. A small performance improvement in the DOTALL UTF-8 mode .* case.
28    
29     4. Debugging: adjusted the names of opcodes for different kinds of parentheses
30        in debug output.
31    
32    
33    
34    Version 7.2 19-Jun-07
35  ---------------------  ---------------------
36    
37   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 11  Version 7.2 01-May-07 Line 41  Version 7.2 01-May-07
41      to make them independent of the local environment's newline setting.      to make them independent of the local environment's newline setting.
42    
43   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.
44    
45   4. Some of the "internals" tests were previously cut out when the link size   4. Some of the "internals" tests were previously cut out when the link size
46      was not 2, because the output contained actual offsets. The recent new      was not 2, because the output contained actual offsets. The recent new
47      "Z" feature of pcretest means that these can be cut out, making the tests      "Z" feature of pcretest means that these can be cut out, making the tests
48      usable with all link sizes.      usable with all link sizes.
49    
50     5. Implemented Stan Switzer's goto replacement for longjmp() when not using
51        stack recursion. This gives a massive performance boost under BSD, but just
52        a small improvement under Linux. However, it saves one field in the frame
53        in all cases.
54    
55     6. Added more features from the forthcoming Perl 5.10:
56    
57        (a) (?-n) (where n is a string of digits) is a relative subroutine or
58            recursion call. It refers to the nth most recently opened parentheses.
59    
60        (b) (?+n) is also a relative subroutine call; it refers to the nth next
61            to be opened parentheses.
62    
63        (c) Conditions that refer to capturing parentheses can be specified
64            relatively, for example, (?(-2)... or (?(+3)...
65    
66        (d) \K resets the start of the current match so that everything before
67            is not part of it.
68    
69        (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
70    
71        (f) \g{name} is another synonym - part of Perl 5.10's unification of
72            reference syntax.
73    
74        (g) (?| introduces a group in which the numbering of parentheses in each
75            alternative starts with the same number.
76    
77        (h) \h, \H, \v, and \V match horizontal and vertical whitespace.
78    
79     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
80        PCRE_INFO_JCHANGED.
81    
82     8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not
83        terminating or by crashing. Diagnosed by Viktor Griph; it was in the code
84        for detecting groups that can match an empty string.
85    
86     9. A pattern with a very large number of alternatives (more than several
87        hundred) was running out of internal workspace during the pre-compile
88        phase, where pcre_compile() figures out how much memory will be needed. A
89        bit of new cunning has reduced the workspace needed for groups with
90        alternatives. The 1000-alternative test pattern now uses 12 bytes of
91        workspace instead of running out of the 4096 that are available.
92    
93    10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.
94    
95    11. Applied patch from Google to remove an optimization that didn't quite work.
96        The report of the bug said:
97    
98          pcrecpp::RE("a*").FullMatch("aaa") matches, while
99          pcrecpp::RE("a*?").FullMatch("aaa") does not, and
100          pcrecpp::RE("a*?\\z").FullMatch("aaa") does again.
101    
102    12. If \p or \P was used in non-UTF-8 mode on a character greater than 127
103        it matched the wrong number of bytes.
104    
105    
106  Version 7.1 24-Apr-07  Version 7.1 24-Apr-07

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