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revision 98 by ph10, Mon Mar 5 15:55:02 2007 UTC revision 158 by ph10, Tue May 1 10:30:14 2007 UTC
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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.      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    
14    Version 7.1 24-Apr-07
15    ---------------------
16    
17     1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
18        that is more "standard", making use of automake and other Autotools. There
19        is some re-arrangement of the files and adjustment of comments consequent
20        on this.
21    
22     2. Part of the patch fixed a problem with the pcregrep tests. The test of -r
23        for recursive directory scanning broke on some systems because the files
24        are not scanned in any specific order and on different systems the order
25        was different. A call to "sort" has been inserted into RunGrepTest for the
26        approprate test as a short-term fix. In the longer term there may be an
27        alternative.
28    
29     3. I had an email from Eric Raymond about problems translating some of PCRE's
30        man pages to HTML (despite the fact that I distribute HTML pages, some
31        people do their own conversions for various reasons). The problems
32        concerned the use of low-level troff macros .br and .in. I have therefore
33        removed all such uses from the man pages (some were redundant, some could
34        be replaced by .nf/.fi pairs). The 132html script that I use to generate
35        HTML has been updated to handle .nf/.fi and to complain if it encounters
36        .br or .in.
37    
38     4. Updated comments in configure.ac that get placed in config.h.in and also
39        arranged for config.h to be included in the distribution, with the name
40        config.h.generic, for the benefit of those who have to compile without
41        Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
42    
43     5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
44        Weber: (1) pcre_internal.h was missing some function renames; (2) updated
45        makevp.bat for the current PCRE, using the additional files
46        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
47    
48     6. A Windows user reported a minor discrepancy with test 2, which turned out
49        to be caused by a trailing space on an input line that had got lost in his
50        copy. The trailing space was an accident, so I've just removed it.
51    
52     7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
53        that is needed.
54    
55     8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)
56        as "const" (a) because they are and (b) because it helps the PHP
57        maintainers who have recently made a script to detect big data structures
58        in the php code that should be moved to the .rodata section. I remembered
59        to update Builducptable as well, so it won't revert if ucptable.h is ever
60        re-created.
61    
62     9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,
63        pcre_printint.src, pcre_compile.c, pcre_study.c, and pcre_tables.c, in
64        order to be able to cut out the UTF-8 tables in the latter when UTF-8
65        support is not required. This saves 1.5-2K of code, which is important in
66        some applications.
67    
68        Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
69        so as not to refer to the tables, even though these functions will never be
70        called when UTF-8 support is disabled. Otherwise there are problems with a
71        shared library.
72    
73    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
74    
75        (a) It was defining its arguments as char * instead of void *.
76    
77        (b) It was assuming that all moves were upwards in memory; this was true
78            a long time ago when I wrote it, but is no longer the case.
79    
80        The emulated memove() is provided for those environments that have neither
81        memmove() nor bcopy(). I didn't think anyone used it these days, but that
82        is clearly not the case, as these two bugs were recently reported.
83    
84    11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
85        and Detrail to create the HTML documentation, the .txt form of the man
86        pages, and it removes trailing spaces from listed files. It also creates
87        pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
88        case, it wraps all the #defines with #ifndefs. This script should be run
89        before "make dist".
90    
91    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
92        with Unicode property support.
93    
94        (a) For a maximizing quantifier, if the two different cases of the
95            character were of different lengths in their UTF-8 codings (there are
96            some cases like this - I found 11), and the matching function had to
97            back up over a mixture of the two cases, it incorrectly assumed they
98            were both the same length.
99    
100        (b) When PCRE was configured to use the heap rather than the stack for
101            recursion during matching, it was not correctly preserving the data for
102            the other case of a UTF-8 character when checking ahead for a match
103            while processing a minimizing repeat. If the check also involved
104            matching a wide character, but failed, corruption could cause an
105            erroneous result when trying to check for a repeat of the original
106            character.
107    
108    13. Some tidying changes to the testing mechanism:
109    
110        (a) The RunTest script now detects the internal link size and whether there
111            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
112            values substituted by "configure". (The RunGrepTest script already did
113            this for UTF-8.) The configure.ac script no longer substitutes the
114            relevant variables.
115    
116        (b) The debugging options /B and /D in pcretest show the compiled bytecode
117            with length and offset values. This means that the output is different
118            for different internal link sizes. Test 2 is skipped for link sizes
119            other than 2 because of this, bypassing the problem. Unfortunately,
120            there was also a test in test 3 (the locale tests) that used /B and
121            failed for link sizes other than 2. Rather than cut the whole test out,
122            I have added a new /Z option to pcretest that replaces the length and
123            offset values with spaces. This is now used to make test 3 independent
124            of link size. (Test 2 will be tidied up later.)
125    
126    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
127        segmentation fault instead of returning the appropriate error message.
128    
129    15. In multiline mode when the newline sequence was set to "any", the pattern
130        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
131        This doesn't seem right; it now treats the CRLF combination as the line
132        ending, and so does not match in that case. It's only a pattern such as ^$
133        that would hit this one: something like ^ABC$ would have failed after \r
134        and then tried again after \r\n.
135    
136    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
137        in an attempt to make files that differ only in their line terminators
138        compare equal. This works on Linux.
139    
140    17. Under certain error circumstances pcregrep might try to free random memory
141        as it exited. This is now fixed, thanks to valgrind.
142    
143    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
144        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
145        was because its rules for how to advance for /g after matching an empty
146        string at the end of a line did not allow for this case. They now check for
147        it specially.
148    
149    20. pcretest is supposed to handle patterns and data of any length, by
150        extending its buffers when necessary. It was getting this wrong when the
151        buffer for a data line had to be extended.
152    
153    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
154        CRLF as a newline sequence.
155    
156    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
157        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
158        I have nevertheless tidied it up.
159    
160    23. Added some casts to kill warnings from HP-UX ia64 compiler.
161    
162    24. Added a man page for pcre-config.
163    
164    
165  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06

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