/[pcre]/code/trunk/ChangeLog
ViewVC logotype

Diff of /code/trunk/ChangeLog

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 102 by ph10, Tue Mar 6 15:50:45 2007 UTC revision 167 by ph10, Wed May 9 15:53:54 2007 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.1 05-Mar-07  Version 7.2 01-May-07
5  ---------------------  ---------------------
6    
7   1. Applied Bob Rossi and Daniel G's patches to convert the build system to one   1. If the fr_FR locale cannot be found for test 3, try the "french" locale,
8      that is more "standard", making use of automake and other autotools. There      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    
37    Version 7.1 24-Apr-07
38    ---------------------
39    
40     1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
41        that is more "standard", making use of automake and other Autotools. There
42      is some re-arrangement of the files and adjustment of comments consequent      is some re-arrangement of the files and adjustment of comments consequent
43      on this.      on this.
44    
45   2. Part of the patch fixed a problem with the pcregrep tests. The test of -r   2. Part of the patch fixed a problem with the pcregrep tests. The test of -r
46      for recursive directory scanning broke on some systems because the files      for recursive directory scanning broke on some systems because the files
47      are not scanned in any specific order and on different systems the order      are not scanned in any specific order and on different systems the order
48      was different. A call to "sort" has been inserted into RunGrepTest for the      was different. A call to "sort" has been inserted into RunGrepTest for the
49      approprate test as a short-term fix. In the longer term there may be an      approprate test as a short-term fix. In the longer term there may be an
50      alternative.      alternative.
51    
52   3. I had an email from Eric Raymond about problems translating some of PCRE's   3. I had an email from Eric Raymond about problems translating some of PCRE's
53      man pages to HTML (despite the fact that I distribute HTML pages, some      man pages to HTML (despite the fact that I distribute HTML pages, some
54      people do their own conversions for various reasons). The problems      people do their own conversions for various reasons). The problems
55      concerned the use of low-level troff macros .br and .in. I have therefore      concerned the use of low-level troff macros .br and .in. I have therefore
56      removed all such uses from the man pages (some were redundant, some could      removed all such uses from the man pages (some were redundant, some could
57      be replaced by .nf/.fi pairs). The maintain/132html script that I use to      be replaced by .nf/.fi pairs). The 132html script that I use to generate
58      generate HTML has been updated to handle .nf/.fi and to complain if it      HTML has been updated to handle .nf/.fi and to complain if it encounters
59      encounters .br or .in.      .br or .in.
60    
61   4. Updated comments in configure.ac that get placed in config.h.in and also   4. Updated comments in configure.ac that get placed in config.h.in and also
62      arranged for config.h to be included in the distribution, for the benefit      arranged for config.h to be included in the distribution, with the name
63      of those who have to compile without Autotools (compare pcre.h).      config.h.generic, for the benefit of those who have to compile without
64        Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
65   5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan  
66      Weber: (1) pcre_internal.h was missing some function renames; (2) updated   5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
67      makevp.bat for the current PCRE, using the additional files !compile.txt,      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
68      !linklib.txt, and pcregexp.pas.      makevp.bat for the current PCRE, using the additional files
69        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
70   6. A Windows user reported a minor discrepancy with test 2, which turned out  
71      to be caused by a trailing space on an input line that had got lost in his   6. A Windows user reported a minor discrepancy with test 2, which turned out
72        to be caused by a trailing space on an input line that had got lost in his
73      copy. The trailing space was an accident, so I've just removed it.      copy. The trailing space was an accident, so I've just removed it.
74    
75     7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
76        that is needed.
77    
78     8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)
79        as "const" (a) because they are and (b) because it helps the PHP
80        maintainers who have recently made a script to detect big data structures
81        in the php code that should be moved to the .rodata section. I remembered
82        to update Builducptable as well, so it won't revert if ucptable.h is ever
83        re-created.
84    
85     9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,
86        pcre_printint.src, pcre_compile.c, pcre_study.c, and pcre_tables.c, in
87        order to be able to cut out the UTF-8 tables in the latter when UTF-8
88        support is not required. This saves 1.5-2K of code, which is important in
89        some applications.
90    
91        Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
92        so as not to refer to the tables, even though these functions will never be
93        called when UTF-8 support is disabled. Otherwise there are problems with a
94        shared library.
95    
96    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
97    
98        (a) It was defining its arguments as char * instead of void *.
99    
100        (b) It was assuming that all moves were upwards in memory; this was true
101            a long time ago when I wrote it, but is no longer the case.
102    
103        The emulated memove() is provided for those environments that have neither
104        memmove() nor bcopy(). I didn't think anyone used it these days, but that
105        is clearly not the case, as these two bugs were recently reported.
106    
107    11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
108        and Detrail to create the HTML documentation, the .txt form of the man
109        pages, and it removes trailing spaces from listed files. It also creates
110        pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
111        case, it wraps all the #defines with #ifndefs. This script should be run
112        before "make dist".
113    
114    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
115        with Unicode property support.
116    
117        (a) For a maximizing quantifier, if the two different cases of the
118            character were of different lengths in their UTF-8 codings (there are
119            some cases like this - I found 11), and the matching function had to
120            back up over a mixture of the two cases, it incorrectly assumed they
121            were both the same length.
122    
123        (b) When PCRE was configured to use the heap rather than the stack for
124            recursion during matching, it was not correctly preserving the data for
125            the other case of a UTF-8 character when checking ahead for a match
126            while processing a minimizing repeat. If the check also involved
127            matching a wide character, but failed, corruption could cause an
128            erroneous result when trying to check for a repeat of the original
129            character.
130    
131    13. Some tidying changes to the testing mechanism:
132    
133        (a) The RunTest script now detects the internal link size and whether there
134            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
135            values substituted by "configure". (The RunGrepTest script already did
136            this for UTF-8.) The configure.ac script no longer substitutes the
137            relevant variables.
138    
139        (b) The debugging options /B and /D in pcretest show the compiled bytecode
140            with length and offset values. This means that the output is different
141            for different internal link sizes. Test 2 is skipped for link sizes
142            other than 2 because of this, bypassing the problem. Unfortunately,
143            there was also a test in test 3 (the locale tests) that used /B and
144            failed for link sizes other than 2. Rather than cut the whole test out,
145            I have added a new /Z option to pcretest that replaces the length and
146            offset values with spaces. This is now used to make test 3 independent
147            of link size. (Test 2 will be tidied up later.)
148    
149    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
150        segmentation fault instead of returning the appropriate error message.
151    
152    15. In multiline mode when the newline sequence was set to "any", the pattern
153        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
154        This doesn't seem right; it now treats the CRLF combination as the line
155        ending, and so does not match in that case. It's only a pattern such as ^$
156        that would hit this one: something like ^ABC$ would have failed after \r
157        and then tried again after \r\n.
158    
159    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
160        in an attempt to make files that differ only in their line terminators
161        compare equal. This works on Linux.
162    
163    17. Under certain error circumstances pcregrep might try to free random memory
164        as it exited. This is now fixed, thanks to valgrind.
165    
166    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
167        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
168        was because its rules for how to advance for /g after matching an empty
169        string at the end of a line did not allow for this case. They now check for
170        it specially.
171    
172    20. pcretest is supposed to handle patterns and data of any length, by
173        extending its buffers when necessary. It was getting this wrong when the
174        buffer for a data line had to be extended.
175    
176    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
177        CRLF as a newline sequence.
178    
179    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
180        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
181        I have nevertheless tidied it up.
182    
183    23. Added some casts to kill warnings from HP-UX ia64 compiler.
184    
185    24. Added a man page for pcre-config.
186    
187    
188  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
189  ---------------------  ---------------------

Legend:
Removed from v.102  
changed lines
  Added in v.167

webmaster@exim.org
ViewVC Help
Powered by ViewVC 1.1.12