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revision 170 by ph10, Mon Jun 4 11:21:13 2007 UTC revision 193 by ph10, Mon Jul 30 11:34:18 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     5. Arrange to use "%I64d" instead of "%lld" for long printing in the pcrecpp
33        unittest when running under MinGW.
34    
35    
36    
37    Version 7.2 19-Jun-07
38  ---------------------  ---------------------
39    
40   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 21  Version 7.2 01-May-07 Line 54  Version 7.2 01-May-07
54      stack recursion. This gives a massive performance boost under BSD, but just      stack recursion. This gives a massive performance boost under BSD, but just
55      a small improvement under Linux. However, it saves one field in the frame      a small improvement under Linux. However, it saves one field in the frame
56      in all cases.      in all cases.
57    
58   6. Added more features from the forthcoming Perl 5.10:   6. Added more features from the forthcoming Perl 5.10:
59    
60      (a) (?-n) (where n is a string of digits) is a relative subroutine or      (a) (?-n) (where n is a string of digits) is a relative subroutine or
61          recursion call. It refers to the nth most recently opened parentheses.          recursion call. It refers to the nth most recently opened parentheses.
62    
63      (b) (?+n) is also a relative subroutine call; it refers to the nth next      (b) (?+n) is also a relative subroutine call; it refers to the nth next
64          to be opened parentheses.          to be opened parentheses.
65    
66      (c) Conditions that refer to capturing parentheses can be specified      (c) Conditions that refer to capturing parentheses can be specified
67          relatively, for example, (?(-2)... or (?(+3)...          relatively, for example, (?(-2)... or (?(+3)...
68    
69      (d) \K resets the start of the current match so that everything before      (d) \K resets the start of the current match so that everything before
70          is not part of it.          is not part of it.
71    
72   7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and      (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
73      PCRE_INFO_JCHANGED.  
74        (f) \g{name} is another synonym - part of Perl 5.10's unification of
75   8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not          reference syntax.
76      terminating or by crashing. Diagnosed by Viktor Griph; it was in the code  
77        (g) (?| introduces a group in which the numbering of parentheses in each
78            alternative starts with the same number.
79    
80        (h) \h, \H, \v, and \V match horizontal and vertical whitespace.
81    
82     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
83        PCRE_INFO_JCHANGED.
84    
85     8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not
86        terminating or by crashing. Diagnosed by Viktor Griph; it was in the code
87      for detecting groups that can match an empty string.      for detecting groups that can match an empty string.
88    
89     9. A pattern with a very large number of alternatives (more than several
90        hundred) was running out of internal workspace during the pre-compile
91        phase, where pcre_compile() figures out how much memory will be needed. A
92        bit of new cunning has reduced the workspace needed for groups with
93        alternatives. The 1000-alternative test pattern now uses 12 bytes of
94        workspace instead of running out of the 4096 that are available.
95    
96    10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.
97    
98    11. Applied patch from Google to remove an optimization that didn't quite work.
99        The report of the bug said:
100    
101          pcrecpp::RE("a*").FullMatch("aaa") matches, while
102          pcrecpp::RE("a*?").FullMatch("aaa") does not, and
103          pcrecpp::RE("a*?\\z").FullMatch("aaa") does again.
104    
105    12. If \p or \P was used in non-UTF-8 mode on a character greater than 127
106        it matched the wrong number of bytes.
107    
108    
109  Version 7.1 24-Apr-07  Version 7.1 24-Apr-07
110  ---------------------  ---------------------

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