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revision 123 by ph10, Mon Mar 12 15:19:06 2007 UTC revision 181 by ph10, Wed Jun 13 14:55:18 2007 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.1 12-Mar-07  Version 7.2 13-June-07
5    ---------------------
6    
7     1. If the fr_FR locale cannot be found for test 3, try the "french" locale,
8        which is apparently normally available under Windows.
9    
10     2. Re-jig the pcregrep tests with different newline settings in an attempt
11        to make them independent of the local environment's newline setting.
12    
13     3. Add code to configure.ac to remove -g from the CFLAGS default settings.
14    
15     4. Some of the "internals" tests were previously cut out when the link size
16        was not 2, because the output contained actual offsets. The recent new
17        "Z" feature of pcretest means that these can be cut out, making the tests
18        usable with all link sizes.
19    
20     5. Implemented Stan Switzer's goto replacement for longjmp() when not using
21        stack recursion. This gives a massive performance boost under BSD, but just
22        a small improvement under Linux. However, it saves one field in the frame
23        in all cases.
24    
25     6. Added more features from the forthcoming Perl 5.10:
26    
27        (a) (?-n) (where n is a string of digits) is a relative subroutine or
28            recursion call. It refers to the nth most recently opened parentheses.
29    
30        (b) (?+n) is also a relative subroutine call; it refers to the nth next
31            to be opened parentheses.
32    
33        (c) Conditions that refer to capturing parentheses can be specified
34            relatively, for example, (?(-2)... or (?(+3)...
35    
36        (d) \K resets the start of the current match so that everything before
37            is not part of it.
38    
39        (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
40    
41        (f) \g{name} is another synonym - part of Perl 5.10's unification of
42            reference syntax.
43    
44        (g) (?| introduces a group in which the numbering of parentheses in each
45            alternative starts with the same number.
46    
47        (h) \h, \H, \v, and \V match horizontal and vertical whitespace.
48    
49     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
50        PCRE_INFO_JCHANGED.
51    
52     8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not
53        terminating or by crashing. Diagnosed by Viktor Griph; it was in the code
54        for detecting groups that can match an empty string.
55    
56     9. A pattern with a very large number of alternatives (more than several
57        hundred) was running out of internal workspace during the pre-compile
58        phase, where pcre_compile() figures out how much memory will be needed. A
59        bit of new cunning has reduced the workspace needed for groups with
60        alternatives. The 1000-alternative test pattern now uses 12 bytes of
61        workspace instead of running out of the 4096 that are available.
62    
63    10. Inserted some missing (unsigned int) casts to get rid of compiler warnings.
64    
65    11. Applied patch from Google to remove an optimization that didn't quite work.
66        The report of the bug said:
67    
68          pcrecpp::RE("a*").FullMatch("aaa") matches, while
69          pcrecpp::RE("a*?").FullMatch("aaa") does not, and
70          pcrecpp::RE("a*?\\z").FullMatch("aaa") does again.
71    
72    
73    Version 7.1 24-Apr-07
74  ---------------------  ---------------------
75    
76   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 32  Version 7.1 12-Mar-07 Line 101  Version 7.1 12-Mar-07
101    
102   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
103      Weber: (1) pcre_internal.h was missing some function renames; (2) updated      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
104      makevp.bat for the current PCRE, using the additional files !compile.txt,      makevp.bat for the current PCRE, using the additional files
105      !linklib.txt, and pcregexp.pas.      makevp_c.txt, makevp_l.txt, and pcregexp.pas.
106    
107   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
108      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 116  Version 7.1 12-Mar-07 Line 185  Version 7.1 12-Mar-07
185  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
186      segmentation fault instead of returning the appropriate error message.      segmentation fault instead of returning the appropriate error message.
187    
188    15. In multiline mode when the newline sequence was set to "any", the pattern
189        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
190        This doesn't seem right; it now treats the CRLF combination as the line
191        ending, and so does not match in that case. It's only a pattern such as ^$
192        that would hit this one: something like ^ABC$ would have failed after \r
193        and then tried again after \r\n.
194    
195    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
196        in an attempt to make files that differ only in their line terminators
197        compare equal. This works on Linux.
198    
199    17. Under certain error circumstances pcregrep might try to free random memory
200        as it exited. This is now fixed, thanks to valgrind.
201    
202    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
203        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
204        was because its rules for how to advance for /g after matching an empty
205        string at the end of a line did not allow for this case. They now check for
206        it specially.
207    
208    20. pcretest is supposed to handle patterns and data of any length, by
209        extending its buffers when necessary. It was getting this wrong when the
210        buffer for a data line had to be extended.
211    
212    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
213        CRLF as a newline sequence.
214    
215    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
216        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
217        I have nevertheless tidied it up.
218    
219    23. Added some casts to kill warnings from HP-UX ia64 compiler.
220    
221    24. Added a man page for pcre-config.
222    
223    
224  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
225  ---------------------  ---------------------

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