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revision 100 by ph10, Tue Mar 6 14:53:10 2007 UTC revision 157 by ph10, Tue May 1 09:19:56 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. There      which is apparently normally available under Windows.
9    
10    
11    Version 7.1 24-Apr-07
12    ---------------------
13    
14     1. Applied Bob Rossi and Daniel G's patches to convert the build system to one
15        that is more "standard", making use of automake and other Autotools. There
16      is some re-arrangement of the files and adjustment of comments consequent      is some re-arrangement of the files and adjustment of comments consequent
17      on this.      on this.
18    
19   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
20      for recursive directory scanning broke on some systems because the files      for recursive directory scanning broke on some systems because the files
21      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
22      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
23      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
24      alternative.      alternative.
25    
26   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
27      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
28      people do their own conversions for various reasons). The problems      people do their own conversions for various reasons). The problems
29      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
30      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
31      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
32      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
33      encounters .br or .in.      .br or .in.
34    
35   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
36      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
37      of those who have to compile without Autotools (compare pcre.h).      config.h.generic, for the benefit of those who have to compile without
38        Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
39    
40     5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan
41        Weber: (1) pcre_internal.h was missing some function renames; (2) updated
42        makevp.bat for the current PCRE, using the additional files
43        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
44    
45     6. A Windows user reported a minor discrepancy with test 2, which turned out
46        to be caused by a trailing space on an input line that had got lost in his
47        copy. The trailing space was an accident, so I've just removed it.
48    
49     7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
50        that is needed.
51    
52     8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)
53        as "const" (a) because they are and (b) because it helps the PHP
54        maintainers who have recently made a script to detect big data structures
55        in the php code that should be moved to the .rodata section. I remembered
56        to update Builducptable as well, so it won't revert if ucptable.h is ever
57        re-created.
58    
59     9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,
60        pcre_printint.src, pcre_compile.c, pcre_study.c, and pcre_tables.c, in
61        order to be able to cut out the UTF-8 tables in the latter when UTF-8
62        support is not required. This saves 1.5-2K of code, which is important in
63        some applications.
64    
65        Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
66        so as not to refer to the tables, even though these functions will never be
67        called when UTF-8 support is disabled. Otherwise there are problems with a
68        shared library.
69    
70    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
71    
72        (a) It was defining its arguments as char * instead of void *.
73    
74        (b) It was assuming that all moves were upwards in memory; this was true
75            a long time ago when I wrote it, but is no longer the case.
76    
77        The emulated memove() is provided for those environments that have neither
78        memmove() nor bcopy(). I didn't think anyone used it these days, but that
79        is clearly not the case, as these two bugs were recently reported.
80    
81    11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
82        and Detrail to create the HTML documentation, the .txt form of the man
83        pages, and it removes trailing spaces from listed files. It also creates
84        pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
85        case, it wraps all the #defines with #ifndefs. This script should be run
86        before "make dist".
87    
88    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
89        with Unicode property support.
90    
91        (a) For a maximizing quantifier, if the two different cases of the
92            character were of different lengths in their UTF-8 codings (there are
93            some cases like this - I found 11), and the matching function had to
94            back up over a mixture of the two cases, it incorrectly assumed they
95            were both the same length.
96    
97        (b) When PCRE was configured to use the heap rather than the stack for
98            recursion during matching, it was not correctly preserving the data for
99            the other case of a UTF-8 character when checking ahead for a match
100            while processing a minimizing repeat. If the check also involved
101            matching a wide character, but failed, corruption could cause an
102            erroneous result when trying to check for a repeat of the original
103            character.
104    
105    13. Some tidying changes to the testing mechanism:
106    
107        (a) The RunTest script now detects the internal link size and whether there
108            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
109            values substituted by "configure". (The RunGrepTest script already did
110            this for UTF-8.) The configure.ac script no longer substitutes the
111            relevant variables.
112    
113        (b) The debugging options /B and /D in pcretest show the compiled bytecode
114            with length and offset values. This means that the output is different
115            for different internal link sizes. Test 2 is skipped for link sizes
116            other than 2 because of this, bypassing the problem. Unfortunately,
117            there was also a test in test 3 (the locale tests) that used /B and
118            failed for link sizes other than 2. Rather than cut the whole test out,
119            I have added a new /Z option to pcretest that replaces the length and
120            offset values with spaces. This is now used to make test 3 independent
121            of link size. (Test 2 will be tidied up later.)
122    
123    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
124        segmentation fault instead of returning the appropriate error message.
125    
126    15. In multiline mode when the newline sequence was set to "any", the pattern
127        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
128        This doesn't seem right; it now treats the CRLF combination as the line
129        ending, and so does not match in that case. It's only a pattern such as ^$
130        that would hit this one: something like ^ABC$ would have failed after \r
131        and then tried again after \r\n.
132    
133    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
134        in an attempt to make files that differ only in their line terminators
135        compare equal. This works on Linux.
136    
137    17. Under certain error circumstances pcregrep might try to free random memory
138        as it exited. This is now fixed, thanks to valgrind.
139    
140    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
141        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
142        was because its rules for how to advance for /g after matching an empty
143        string at the end of a line did not allow for this case. They now check for
144        it specially.
145    
146    20. pcretest is supposed to handle patterns and data of any length, by
147        extending its buffers when necessary. It was getting this wrong when the
148        buffer for a data line had to be extended.
149    
150    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
151        CRLF as a newline sequence.
152    
153    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
154        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
155        I have nevertheless tidied it up.
156    
157    23. Added some casts to kill warnings from HP-UX ia64 compiler.
158    
159    24. Added a man page for pcre-config.
160    
161    
162  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
163  ---------------------  ---------------------

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