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revision 98 by ph10, Mon Mar 5 15:55:02 2007 UTC revision 160 by ph10, Wed May 2 10:58:35 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
4  Version 7.1 05-Mar-07  Version 7.2 01-May-07
5  ---------------------  ---------------------
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.
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.
13     3. Add code to configure.ac to remove -g from the CFLAGS default settings.
16    Version 7.1 24-Apr-07
17    ---------------------
19     1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
20        that is more "standard", making use of automake and other Autotools. There
21        is some re-arrangement of the files and adjustment of comments consequent
22        on this.
24     2. Part of the patch fixed a problem with the pcregrep tests. The test of -r
25        for recursive directory scanning broke on some systems because the files
26        are not scanned in any specific order and on different systems the order
27        was different. A call to "sort" has been inserted into RunGrepTest for the
28        approprate test as a short-term fix. In the longer term there may be an
29        alternative.
31     3. I had an email from Eric Raymond about problems translating some of PCRE's
32        man pages to HTML (despite the fact that I distribute HTML pages, some
33        people do their own conversions for various reasons). The problems
34        concerned the use of low-level troff macros .br and .in. I have therefore
35        removed all such uses from the man pages (some were redundant, some could
36        be replaced by .nf/.fi pairs). The 132html script that I use to generate
37        HTML has been updated to handle .nf/.fi and to complain if it encounters
38        .br or .in.
40     4. Updated comments in configure.ac that get placed in config.h.in and also
41        arranged for config.h to be included in the distribution, with the name
42        config.h.generic, for the benefit of those who have to compile without
43        Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
45     5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
46        Weber: (1) pcre_internal.h was missing some function renames; (2) updated
47        makevp.bat for the current PCRE, using the additional files
48        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
50     6. A Windows user reported a minor discrepancy with test 2, which turned out
51        to be caused by a trailing space on an input line that had got lost in his
52        copy. The trailing space was an accident, so I've just removed it.
54     7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
55        that is needed.
57     8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)
58        as "const" (a) because they are and (b) because it helps the PHP
59        maintainers who have recently made a script to detect big data structures
60        in the php code that should be moved to the .rodata section. I remembered
61        to update Builducptable as well, so it won't revert if ucptable.h is ever
62        re-created.
64     9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,
65        pcre_printint.src, pcre_compile.c, pcre_study.c, and pcre_tables.c, in
66        order to be able to cut out the UTF-8 tables in the latter when UTF-8
67        support is not required. This saves 1.5-2K of code, which is important in
68        some applications.
70        Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
71        so as not to refer to the tables, even though these functions will never be
72        called when UTF-8 support is disabled. Otherwise there are problems with a
73        shared library.
75    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
77        (a) It was defining its arguments as char * instead of void *.
79        (b) It was assuming that all moves were upwards in memory; this was true
80            a long time ago when I wrote it, but is no longer the case.
82        The emulated memove() is provided for those environments that have neither
83        memmove() nor bcopy(). I didn't think anyone used it these days, but that
84        is clearly not the case, as these two bugs were recently reported.
86    11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
87        and Detrail to create the HTML documentation, the .txt form of the man
88        pages, and it removes trailing spaces from listed files. It also creates
89        pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
90        case, it wraps all the #defines with #ifndefs. This script should be run
91        before "make dist".
93    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
94        with Unicode property support.
96        (a) For a maximizing quantifier, if the two different cases of the
97            character were of different lengths in their UTF-8 codings (there are
98            some cases like this - I found 11), and the matching function had to
99            back up over a mixture of the two cases, it incorrectly assumed they
100            were both the same length.
102        (b) When PCRE was configured to use the heap rather than the stack for
103            recursion during matching, it was not correctly preserving the data for
104            the other case of a UTF-8 character when checking ahead for a match
105            while processing a minimizing repeat. If the check also involved
106            matching a wide character, but failed, corruption could cause an
107            erroneous result when trying to check for a repeat of the original
108            character.
110    13. Some tidying changes to the testing mechanism:
112        (a) The RunTest script now detects the internal link size and whether there
113            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
114            values substituted by "configure". (The RunGrepTest script already did
115            this for UTF-8.) The configure.ac script no longer substitutes the
116            relevant variables.
118        (b) The debugging options /B and /D in pcretest show the compiled bytecode
119            with length and offset values. This means that the output is different
120            for different internal link sizes. Test 2 is skipped for link sizes
121            other than 2 because of this, bypassing the problem. Unfortunately,
122            there was also a test in test 3 (the locale tests) that used /B and
123            failed for link sizes other than 2. Rather than cut the whole test out,
124            I have added a new /Z option to pcretest that replaces the length and
125            offset values with spaces. This is now used to make test 3 independent
126            of link size. (Test 2 will be tidied up later.)
128    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
129        segmentation fault instead of returning the appropriate error message.
131    15. In multiline mode when the newline sequence was set to "any", the pattern
132        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
133        This doesn't seem right; it now treats the CRLF combination as the line
134        ending, and so does not match in that case. It's only a pattern such as ^$
135        that would hit this one: something like ^ABC$ would have failed after \r
136        and then tried again after \r\n.
138    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
139        in an attempt to make files that differ only in their line terminators
140        compare equal. This works on Linux.
142    17. Under certain error circumstances pcregrep might try to free random memory
143        as it exited. This is now fixed, thanks to valgrind.
145    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
146        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
147        was because its rules for how to advance for /g after matching an empty
148        string at the end of a line did not allow for this case. They now check for
149        it specially.
151    20. pcretest is supposed to handle patterns and data of any length, by
152        extending its buffers when necessary. It was getting this wrong when the
153        buffer for a data line had to be extended.
155    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
156        CRLF as a newline sequence.
158    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
159        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
160        I have nevertheless tidied it up.
162    23. Added some casts to kill warnings from HP-UX ia64 compiler.
164    24. Added a man page for pcre-config.
167  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06

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