/[pcre]/code/trunk/ChangeLog
ViewVC logotype

Diff of /code/trunk/ChangeLog

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 357 by ph10, Tue Jul 8 14:18:28 2008 UTC revision 409 by ph10, Sat Mar 28 17:10:56 2009 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.0 02 Jul-08  Version 7.9 xx-xxx-09
5    ---------------------
6    
7    1.  When building with support for bzlib/zlib (pcregrep) and/or readline
8        (pcretest), all targets were linked against these libraries. This included
9        libpcre, libpcreposix, and libpcrecpp, even though they do not use these
10        libraries. This caused unwanted dependencies to be created. This problem
11        has been fixed, and now only pcregrep is linked with bzlib/zlib and only
12        pcretest is linked with readline.
13    
14    2.  The "typedef int BOOL" in pcre_internal.h that was included inside the
15        "#ifndef FALSE" condition by an earlier change (probably 7.8/18) has been
16        moved outside it again, because FALSE and TRUE are already defined in AIX,
17        but BOOL is not.
18    
19    3.  The pcre_config() function was treating the PCRE_MATCH_LIMIT and
20        PCRE_MATCH_LIMIT_RECURSION values as ints, when they should be long ints.
21    
22    4.  The pcregrep documentation said spaces were inserted as well as colons (or
23        hyphens) following file names and line numbers when outputting matching
24        lines. This is not true; no spaces are inserted. I have also clarified the
25        wording for the --colour (or --color) option.
26    
27    5.  In pcregrep, when --colour was used with -o, the list of matching strings
28        was not coloured; this is different to GNU grep, so I have changed it to be
29        the same.
30    
31    6.  When --colo(u)r was used in pcregrep, only the first matching substring in
32        each matching line was coloured. Now it goes on to look for further matches
33        of any of the test patterns, which is the same behaviour as GNU grep.
34    
35    7.  A pattern that could match an empty string could cause pcregrep to loop; it
36        doesn't make sense to accept an empty string match in pcregrep, so I have
37        locked it out (using PCRE's PCRE_NOTEMPTY option). By experiment, this
38        seems to be how GNU grep behaves.
39    
40    8.  The pattern (?(?=.*b)b|^) was incorrectly compiled as "match must be at
41        start or after a newline", because the conditional assertion was not being
42        correctly handled. The rule now is that both the assertion and what follows
43        in the first alternative must satisfy the test.
44    
45    9.  If auto-callout was enabled in a pattern with a conditional group whose
46        condition was an assertion, PCRE could crash during matching, both with
47        pcre_exec() and pcre_dfa_exec().
48    
49    10. The PCRE_DOLLAR_ENDONLY option was not working when pcre_dfa_exec() was
50        used for matching.
51    
52    11. Unicode property support in character classes was not working for
53        characters (bytes) greater than 127 when not in UTF-8 mode.
54    
55    12. Added the -M command line option to pcretest.
56    
57    14. Added the non-standard REG_NOTEMPTY option to the POSIX interface.
58    
59    15. Added the PCRE_NO_START_OPTIMIZE match-time option.
60    
61    16. Added comments and documentation about mis-use of no_arg in the C++
62        wrapper.
63    
64    17. Implemented support for UTF-8 encoding in EBCDIC environments, a patch
65        from Martin Jerabek that uses macro names for all relevant character and
66        string constants.
67    
68    18. Added to pcre_internal.h two configuration checks: (a) If both EBCDIC and
69        SUPPORT_UTF8 are set, give an error; (b) If SUPPORT_UCP is set without
70        SUPPORT_UTF8, define SUPPORT_UTF8. The "configure" script handles both of
71        these, but not everybody uses configure.
72    
73    19. A conditional group that had only one branch was not being correctly
74        recognized as an item that could match an empty string. This meant that an
75        enclosing group might also not be so recognized, causing infinite looping
76        (and probably a segfault) for patterns such as ^"((?(?=[a])[^"])|b)*"$
77        with the subject "ab", where knowledge that the repeated group can match
78        nothing is needed in order to break the loop.
79    
80    20. If a pattern that was compiled with callouts was matched using pcre_dfa_
81        exec(), but without supplying a callout function, matching went wrong.
82    
83    21. If PCRE_ERROR_MATCHLIMIT occurred during a recursion, there was a memory
84        leak if the size of the offset vector was greater than 30. When the vector
85        is smaller, the saved offsets during recursion go onto a local stack
86        vector, but for larger vectors malloc() is used. It was failing to free
87        when the recursion yielded PCRE_ERROR_MATCH_LIMIT (or any other "abnormal"
88        error, in fact).
89    
90    22. There was a missing #ifdef SUPPORT_UTF8 round one of the variables in the
91        heapframe that is used only when UTF-8 support is enabled. This caused no
92        problem, but was untidy.
93    
94    23. Steven Van Ingelgem's patch to CMakeLists.txt to change the name
95        CMAKE_BINARY_DIR to PROJECT_BINARY_DIR so that it works when PCRE is
96        included within another project.
97    
98    24. Steven Van Ingelgem's patches to add more options to the CMake support,
99        slightly modified by me:
100    
101          (a) PCRE_BUILD_TESTS can be set OFF not to build the tests, including
102              not building pcregrep.
103    
104          (b) PCRE_BUILD_PCREGREP can be see OFF not to build pcregrep, but only
105              if PCRE_BUILD_TESTS is also set OFF, because the tests use pcregrep.
106    
107    25. Forward references, both numeric and by name, in patterns that made use of
108        duplicate group numbers, could behave incorrectly or give incorrect errors,
109        because when scanning forward to find the reference group, PCRE was not
110        taking into account the duplicate group numbers. A pattern such as
111        ^X(?3)(a)(?|(b)|(q))(Y) is an example.
112    
113    26. Changed a few more instances of "const unsigned char *" to USPTR, making
114        the feature of a custom pointer more persuasive (as requested by a user).
115    
116    
117    
118    Version 7.8 05-Sep-08
119  ---------------------  ---------------------
120    
121  1.  Replaced UCP searching code with optimized version as implemented for Ad  1.  Replaced UCP searching code with optimized version as implemented for Ad
# Line 13  Version 8.0 02 Jul-08 Line 127  Version 8.0 02 Jul-08
127    
128  2.  Updated the Unicode datatables to Unicode 5.1.0. This adds yet more  2.  Updated the Unicode datatables to Unicode 5.1.0. This adds yet more
129      scripts.      scripts.
130    
131  3.  Change 12 for 7.7 introduced a bug in pcre_study() when a pattern contained  3.  Change 12 for 7.7 introduced a bug in pcre_study() when a pattern contained
132      a group with a zero qualifier. The result of the study could be incorrect,      a group with a zero qualifier. The result of the study could be incorrect,
133      or the function might crash, depending on the pattern.      or the function might crash, depending on the pattern.
134    
135  4.  Caseless matching was not working for non-ASCII characters in back  4.  Caseless matching was not working for non-ASCII characters in back
136      references. For example, /(\x{de})\1/8i was not matching \x{de}\x{fe}.      references. For example, /(\x{de})\1/8i was not matching \x{de}\x{fe}.
137      It now works when Unicode Property Support is available.      It now works when Unicode Property Support is available.
138    
139  5.  In pcretest, an escape such as \x{de} in the data was always generating  5.  In pcretest, an escape such as \x{de} in the data was always generating
140      a UTF-8 string, even in non-UTF-8 mode. Now it generates a single byte in      a UTF-8 string, even in non-UTF-8 mode. Now it generates a single byte in
141      non-UTF-8 mode. If the value is greater than 255, it gives a warning about      non-UTF-8 mode. If the value is greater than 255, it gives a warning about
142      truncation.      truncation.
143    
144  6.  Minor bugfix in pcrecpp.cc (change "" == ... to NULL == ...).  6.  Minor bugfix in pcrecpp.cc (change "" == ... to NULL == ...).
145    
146  7.  Added two (int) casts to pcregrep when printing the difference of two  7.  Added two (int) casts to pcregrep when printing the difference of two
147      pointers, in case they are 64-bit values.      pointers, in case they are 64-bit values.
148    
149    8.  Added comments about Mac OS X stack usage to the pcrestack man page and to
150        test 2 if it fails.
151    
152    9.  Added PCRE_CALL_CONVENTION just before the names of all exported functions,
153        and a #define of that name to empty if it is not externally set. This is to
154        allow users of MSVC to set it if necessary.
155    
156    10. The PCRE_EXP_DEFN macro which precedes exported functions was missing from
157        the convenience functions in the pcre_get.c source file.
158    
159    11. An option change at the start of a pattern that had top-level alternatives
160        could cause overwriting and/or a crash. This command provoked a crash in
161        some environments:
162    
163          printf "/(?i)[\xc3\xa9\xc3\xbd]|[\xc3\xa9\xc3\xbdA]/8\n" | pcretest
164    
165        This potential security problem was recorded as CVE-2008-2371.
166    
167    12. For a pattern where the match had to start at the beginning or immediately
168        after a newline (e.g /.*anything/ without the DOTALL flag), pcre_exec() and
169        pcre_dfa_exec() could read past the end of the passed subject if there was
170        no match. To help with detecting such bugs (e.g. with valgrind), I modified
171        pcretest so that it places the subject at the end of its malloc-ed buffer.
172    
173    13. The change to pcretest in 12 above threw up a couple more cases when pcre_
174        exec() might read past the end of the data buffer in UTF-8 mode.
175    
176    14. A similar bug to 7.3/2 existed when the PCRE_FIRSTLINE option was set and
177        the data contained the byte 0x85 as part of a UTF-8 character within its
178        first line. This applied both to normal and DFA matching.
179    
180    15. Lazy qualifiers were not working in some cases in UTF-8 mode. For example,
181        /^[^d]*?$/8 failed to match "abc".
182    
183    16. Added a missing copyright notice to pcrecpp_internal.h.
184    
185    17. Make it more clear in the documentation that values returned from
186        pcre_exec() in ovector are byte offsets, not character counts.
187    
188    18. Tidied a few places to stop certain compilers from issuing warnings.
189    
190    19. Updated the Virtual Pascal + BCC files to compile the latest v7.7, as
191        supplied by Stefan Weber. I made a further small update for 7.8 because
192        there is a change of source arrangements: the pcre_searchfuncs.c module is
193        replaced by pcre_ucd.c.
194    
195    
196  Version 7.7 07-May-08  Version 7.7 07-May-08
197  ---------------------  ---------------------

Legend:
Removed from v.357  
changed lines
  Added in v.409

webmaster@exim.org
ViewVC Help
Powered by ViewVC 1.1.12