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revision 135 by ph10, Thu Mar 29 09:09:33 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 7.1 12-Mar-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,
41        which is apparently normally available under Windows.
42    
43     2. Re-jig the pcregrep tests with different newline settings in an attempt
44        to make them independent of the local environment's newline setting.
45    
46     3. Add code to configure.ac to remove -g from the CFLAGS default settings.
47    
48     4. Some of the "internals" tests were previously cut out when the link size
49        was not 2, because the output contained actual offsets. The recent new
50        "Z" feature of pcretest means that these can be cut out, making the tests
51        usable with all link sizes.
52    
53     5. Implemented Stan Switzer's goto replacement for longjmp() when not using
54        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
56        in all cases.
57    
58     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
61            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
64            to be opened parentheses.
65    
66        (c) Conditions that refer to capturing parentheses can be specified
67            relatively, for example, (?(-2)... or (?(+3)...
68    
69        (d) \K resets the start of the current match so that everything before
70            is not part of it.
71    
72        (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
73    
74        (f) \g{name} is another synonym - part of Perl 5.10's unification of
75            reference syntax.
76    
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.
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
110  ---------------------  ---------------------
111    
112   1. Applied Bob Rossi and Daniel G's patches to convert the build system to one   1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
# Line 127  Version 7.1 12-Mar-07 Line 232  Version 7.1 12-Mar-07
232      in an attempt to make files that differ only in their line terminators      in an attempt to make files that differ only in their line terminators
233      compare equal. This works on Linux.      compare equal. This works on Linux.
234    
235    17. Under certain error circumstances pcregrep might try to free random memory
236        as it exited. This is now fixed, thanks to valgrind.
237    
238    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
239        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
240        was because its rules for how to advance for /g after matching an empty
241        string at the end of a line did not allow for this case. They now check for
242        it specially.
243    
244    20. pcretest is supposed to handle patterns and data of any length, by
245        extending its buffers when necessary. It was getting this wrong when the
246        buffer for a data line had to be extended.
247    
248    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
249        CRLF as a newline sequence.
250    
251    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
252        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
253        I have nevertheless tidied it up.
254    
255    23. Added some casts to kill warnings from HP-UX ia64 compiler.
256    
257    24. Added a man page for pcre-config.
258    
259    
260  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
261  ---------------------  ---------------------

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