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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 161 by ph10, Thu May 3 10:28:07 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4    Version 7.2 01-May-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    
21    Version 7.1 24-Apr-07
22    ---------------------
23    
24     1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
25        that is more "standard", making use of automake and other Autotools. There
26        is some re-arrangement of the files and adjustment of comments consequent
27        on this.
28    
29     2. Part of the patch fixed a problem with the pcregrep tests. The test of -r
30        for recursive directory scanning broke on some systems because the files
31        are not scanned in any specific order and on different systems the order
32        was different. A call to "sort" has been inserted into RunGrepTest for the
33        approprate test as a short-term fix. In the longer term there may be an
34        alternative.
35    
36     3. I had an email from Eric Raymond about problems translating some of PCRE's
37        man pages to HTML (despite the fact that I distribute HTML pages, some
38        people do their own conversions for various reasons). The problems
39        concerned the use of low-level troff macros .br and .in. I have therefore
40        removed all such uses from the man pages (some were redundant, some could
41        be replaced by .nf/.fi pairs). The 132html script that I use to generate
42        HTML has been updated to handle .nf/.fi and to complain if it encounters
43        .br or .in.
44    
45     4. Updated comments in configure.ac that get placed in config.h.in and also
46        arranged for config.h to be included in the distribution, with the name
47        config.h.generic, for the benefit of those who have to compile without
48        Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
49    
50     5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
51        Weber: (1) pcre_internal.h was missing some function renames; (2) updated
52        makevp.bat for the current PCRE, using the additional files
53        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
54    
55     6. A Windows user reported a minor discrepancy with test 2, which turned out
56        to be caused by a trailing space on an input line that had got lost in his
57        copy. The trailing space was an accident, so I've just removed it.
58    
59     7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
60        that is needed.
61    
62     8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)
63        as "const" (a) because they are and (b) because it helps the PHP
64        maintainers who have recently made a script to detect big data structures
65        in the php code that should be moved to the .rodata section. I remembered
66        to update Builducptable as well, so it won't revert if ucptable.h is ever
67        re-created.
68    
69     9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,
70        pcre_printint.src, pcre_compile.c, pcre_study.c, and pcre_tables.c, in
71        order to be able to cut out the UTF-8 tables in the latter when UTF-8
72        support is not required. This saves 1.5-2K of code, which is important in
73        some applications.
74    
75        Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
76        so as not to refer to the tables, even though these functions will never be
77        called when UTF-8 support is disabled. Otherwise there are problems with a
78        shared library.
79    
80    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
81    
82        (a) It was defining its arguments as char * instead of void *.
83    
84        (b) It was assuming that all moves were upwards in memory; this was true
85            a long time ago when I wrote it, but is no longer the case.
86    
87        The emulated memove() is provided for those environments that have neither
88        memmove() nor bcopy(). I didn't think anyone used it these days, but that
89        is clearly not the case, as these two bugs were recently reported.
90    
91    11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
92        and Detrail to create the HTML documentation, the .txt form of the man
93        pages, and it removes trailing spaces from listed files. It also creates
94        pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
95        case, it wraps all the #defines with #ifndefs. This script should be run
96        before "make dist".
97    
98    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
99        with Unicode property support.
100    
101        (a) For a maximizing quantifier, if the two different cases of the
102            character were of different lengths in their UTF-8 codings (there are
103            some cases like this - I found 11), and the matching function had to
104            back up over a mixture of the two cases, it incorrectly assumed they
105            were both the same length.
106    
107        (b) When PCRE was configured to use the heap rather than the stack for
108            recursion during matching, it was not correctly preserving the data for
109            the other case of a UTF-8 character when checking ahead for a match
110            while processing a minimizing repeat. If the check also involved
111            matching a wide character, but failed, corruption could cause an
112            erroneous result when trying to check for a repeat of the original
113            character.
114    
115    13. Some tidying changes to the testing mechanism:
116    
117        (a) The RunTest script now detects the internal link size and whether there
118            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
119            values substituted by "configure". (The RunGrepTest script already did
120            this for UTF-8.) The configure.ac script no longer substitutes the
121            relevant variables.
122    
123        (b) The debugging options /B and /D in pcretest show the compiled bytecode
124            with length and offset values. This means that the output is different
125            for different internal link sizes. Test 2 is skipped for link sizes
126            other than 2 because of this, bypassing the problem. Unfortunately,
127            there was also a test in test 3 (the locale tests) that used /B and
128            failed for link sizes other than 2. Rather than cut the whole test out,
129            I have added a new /Z option to pcretest that replaces the length and
130            offset values with spaces. This is now used to make test 3 independent
131            of link size. (Test 2 will be tidied up later.)
132    
133    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
134        segmentation fault instead of returning the appropriate error message.
135    
136    15. In multiline mode when the newline sequence was set to "any", the pattern
137        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
138        This doesn't seem right; it now treats the CRLF combination as the line
139        ending, and so does not match in that case. It's only a pattern such as ^$
140        that would hit this one: something like ^ABC$ would have failed after \r
141        and then tried again after \r\n.
142    
143    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
144        in an attempt to make files that differ only in their line terminators
145        compare equal. This works on Linux.
146    
147    17. Under certain error circumstances pcregrep might try to free random memory
148        as it exited. This is now fixed, thanks to valgrind.
149    
150    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
151        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
152        was because its rules for how to advance for /g after matching an empty
153        string at the end of a line did not allow for this case. They now check for
154        it specially.
155    
156    20. pcretest is supposed to handle patterns and data of any length, by
157        extending its buffers when necessary. It was getting this wrong when the
158        buffer for a data line had to be extended.
159    
160    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
161        CRLF as a newline sequence.
162    
163    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
164        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
165        I have nevertheless tidied it up.
166    
167    23. Added some casts to kill warnings from HP-UX ia64 compiler.
168    
169    24. Added a man page for pcre-config.
170    
171    
172  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
173  ---------------------  ---------------------
174    

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