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revision 131 by ph10, Mon Mar 26 15:10:12 2007 UTC revision 192 by ph10, Mon Jul 30 11:23:21 2007 UTC
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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    
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,
38        which is apparently normally available under Windows.
39    
40     2. Re-jig the pcregrep tests with different newline settings in an attempt
41        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.
44    
45     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
47        "Z" feature of pcretest means that these can be cut out, making the tests
48        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
107  ---------------------  ---------------------
108    
109   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 33  Version 7.1 12-Mar-07 Line 135  Version 7.1 12-Mar-07
135   5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan   5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
136      Weber: (1) pcre_internal.h was missing some function renames; (2) updated      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
137      makevp.bat for the current PCRE, using the additional files      makevp.bat for the current PCRE, using the additional files
138      makevp-c.txt, makevp-l.txt, and pcregexp.pas.      makevp_c.txt, makevp_l.txt, and pcregexp.pas.
139    
140   6. A Windows user reported a minor discrepancy with test 2, which turned out   6. A Windows user reported a minor discrepancy with test 2, which turned out
141      to be caused by a trailing space on an input line that had got lost in his      to be caused by a trailing space on an input line that had got lost in his
# Line 115  Version 7.1 12-Mar-07 Line 217  Version 7.1 12-Mar-07
217    
218  14. If erroroffset was passed as NULL to pcre_compile, it provoked a  14. If erroroffset was passed as NULL to pcre_compile, it provoked a
219      segmentation fault instead of returning the appropriate error message.      segmentation fault instead of returning the appropriate error message.
220    
221  15. In multiline mode when the newline sequence was set to "any", the pattern  15. In multiline mode when the newline sequence was set to "any", the pattern
222      ^$ would give a match between the \r and \n of a subject such as "A\r\nB".      ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
223      This doesn't seem right; it now treats the CRLF combination as the line      This doesn't seem right; it now treats the CRLF combination as the line
224      ending, and so does not match in that case. It's only a pattern such as ^$      ending, and so does not match in that case. It's only a pattern such as ^$
225      that would hit this one: something like ^ABC$ would have failed after \r      that would hit this one: something like ^ABC$ would have failed after \r
226      and then tried again after \r\n.      and then tried again after \r\n.
227    
228  16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"  16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
229      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
230      compare equal. This works on Linux.      compare equal. This works on Linux.
231    
232    17. Under certain error circumstances pcregrep might try to free random memory
233        as it exited. This is now fixed, thanks to valgrind.
234    
235    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
236        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
237        was because its rules for how to advance for /g after matching an empty
238        string at the end of a line did not allow for this case. They now check for
239        it specially.
240    
241    20. pcretest is supposed to handle patterns and data of any length, by
242        extending its buffers when necessary. It was getting this wrong when the
243        buffer for a data line had to be extended.
244    
245    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
246        CRLF as a newline sequence.
247    
248    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
249        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
250        I have nevertheless tidied it up.
251    
252    23. Added some casts to kill warnings from HP-UX ia64 compiler.
253    
254    24. Added a man page for pcre-config.
255    
256    
257  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06

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