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revision 108 by ph10, Wed Mar 7 11:11:23 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  ------------------  ------------------
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    
16    Version 7.1 24-Apr-07
17    ---------------------
18    
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      is some re-arrangement of the files and adjustment of comments consequent
22      on this.      on this.
23    
24   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
25      for recursive directory scanning broke on some systems because the files      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      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      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      approprate test as a short-term fix. In the longer term there may be an
29      alternative.      alternative.
30    
31   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
32      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
33      people do their own conversions for various reasons). The problems      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      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      removed all such uses from the man pages (some were redundant, some could
36      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
37      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
38      encounters .br or .in.      .br or .in.
39    
40   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
41      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
42      of those who have to compile without Autotools (compare pcre.h).      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).
44   5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan  
45      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
46      makevp.bat for the current PCRE, using the additional files !compile.txt,      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
47      !linklib.txt, and pcregexp.pas.      makevp.bat for the current PCRE, using the additional files
48        makevp_c.txt, makevp_l.txt, and pcregexp.pas.
49   6. A Windows user reported a minor discrepancy with test 2, which turned out  
50      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
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.      copy. The trailing space was an accident, so I've just removed it.
53    
54   7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told   7. Add -Wl,-R... flags in pcre-config.in for *BSD* systems, as I'm told
55      that is needed.      that is needed.
56    
57   8. Mark ucp_table (in ucptable.h) and ucp_gentype (in pcre_ucp_searchfuncs.c)   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      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      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      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      to update Builducptable as well, so it won't revert if ucptable.h is ever
62      re-created.      re-created.
63    
64   9. Added some extra #ifdef SUPPORT_UTF8 conditionals into pcretest.c,   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      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      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      support is not required. This saves 1.5-2K of code, which is important in
68      some applications.      some applications.
69    
70  10. The emulated memmove() function in pcre_internal.h (provided for those      Later: more #ifdefs are needed in pcre_ord2utf8.c and pcre_valid_utf8.c
71      environments that have neither memmove() nor bcopy()) was defining its      so as not to refer to the tables, even though these functions will never be
72      arguments as char * instead of void *.      called when UTF-8 support is disabled. Otherwise there are problems with a
73        shared library.
74    
75    10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
76    
77        (a) It was defining its arguments as char * instead of void *.
78    
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.
81    
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.
85    
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".
92    
93    12. Fixed two fairly obscure bugs concerned with quantified caseless matching
94        with Unicode property support.
95    
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.
101    
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.
109    
110    13. Some tidying changes to the testing mechanism:
111    
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.
117    
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.)
127    
128    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
129        segmentation fault instead of returning the appropriate error message.
130    
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.
137    
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.
141    
142    17. Under certain error circumstances pcregrep might try to free random memory
143        as it exited. This is now fixed, thanks to valgrind.
144    
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.
150    
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.
154    
155    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
156        CRLF as a newline sequence.
157    
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.
161    
162    23. Added some casts to kill warnings from HP-UX ia64 compiler.
163    
164    24. Added a man page for pcre-config.
165    
166    
167  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
168  ---------------------  ---------------------

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