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revision 176 by ph10, Mon Jun 11 13:48:37 2007 UTC revision 197 by ph10, Tue Jul 31 10:50:18 2007 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.2 05-June-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     6. ESC_K was left out of the EBCDIC table.
36    
37     7. Change 7.0/38 introduced a new limit on the number of nested non-capturing
38        parentheses; I made it 1000, which seemed large enough. Unfortunately, the
39        limit also applies to "virtual nesting" when a pattern is recursive, and in
40        this case 1000 isn't so big. I have been able to remove this limit at the
41        expense of backing off one optimization in certain circumstances. Normally,
42        when pcre_exec() would call its internal match() function recursively and
43        immediately return the result unconditionally, it uses a "tail recursion"
44        feature to save stack. However, when a subpattern that can match an empty
45        string has an unlimited repetition quantifier, it no longer makes this
46        optimization. That gives it a stack frame in which to save the data for
47        checking that an empty string has been matched. Previously this was taken
48        from the 1000-entry workspace that had been reserved. So now there is no
49        explicit limit, but more stack is used.
50    
51    
52    Version 7.2 19-Jun-07
53  ---------------------  ---------------------
54    
55   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 40  Version 7.2 05-June-07 Line 88  Version 7.2 05-June-07
88    
89      (f) \g{name} is another synonym - part of Perl 5.10's unification of      (f) \g{name} is another synonym - part of Perl 5.10's unification of
90          reference syntax.          reference syntax.
91    
92      (g) (?| introduces a group in which the numbering of parentheses in each      (g) (?| introduces a group in which the numbering of parentheses in each
93          alternative starts with the same number.          alternative starts with the same number.
94    
95        (h) \h, \H, \v, and \V match horizontal and vertical whitespace.
96    
97   7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and   7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
98      PCRE_INFO_JCHANGED.      PCRE_INFO_JCHANGED.
# Line 57  Version 7.2 05-June-07 Line 107  Version 7.2 05-June-07
107      bit of new cunning has reduced the workspace needed for groups with      bit of new cunning has reduced the workspace needed for groups with
108      alternatives. The 1000-alternative test pattern now uses 12 bytes of      alternatives. The 1000-alternative test pattern now uses 12 bytes of
109      workspace instead of running out of the 4096 that are available.      workspace instead of running out of the 4096 that are available.
110    
111  10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.  10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.
112    
113    11. Applied patch from Google to remove an optimization that didn't quite work.
114        The report of the bug said:
115    
116          pcrecpp::RE("a*").FullMatch("aaa") matches, while
117          pcrecpp::RE("a*?").FullMatch("aaa") does not, and
118          pcrecpp::RE("a*?\\z").FullMatch("aaa") does again.
119    
120    12. If \p or \P was used in non-UTF-8 mode on a character greater than 127
121        it matched the wrong number of bytes.
122    
123    
124  Version 7.1 24-Apr-07  Version 7.1 24-Apr-07
125  ---------------------  ---------------------

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