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revision 96 by nigel, Fri Mar 2 13:10:43 2007 UTC revision 548 by ph10, Fri Jun 25 14:42:00 2010 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4  Release 7.0 23-Nov-06  Release 8.10 25-Jun-2010
5    ------------------------
6    
7    There are two major additions: support for (*MARK) and friends, and the option
8    PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
9    opposites) so that they make use of Unicode properties. There are also a number
10    of lesser new features, and several bugs have been fixed. A new option,
11    --line-buffered, has been added to pcregrep, for use when it is connected to
12    pipes.
13    
14    
15    Release 8.02 19-Mar-2010
16    ------------------------
17    
18    Another bug-fix release.
19    
20    
21    Release 8.01 19-Jan-2010
22    ------------------------
23    
24    This is a bug-fix release. Several bugs in the code itself and some bugs and
25    infelicities in the build system have been fixed.
26    
27    
28    Release 8.00 19-Oct-09
29    ----------------------
30    
31    Bugs have been fixed in the library and in pcregrep. There are also some
32    enhancements. Restrictions on patterns used for partial matching have been
33    removed, extra information is given for partial matches, the partial matching
34    process has been improved, and an option to make a partial match override a
35    full match is available. The "study" process has been enhanced by finding a
36    lower bound matching length. Groups with duplicate numbers may now have
37    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
38    different names. The documentation has been revised to reflect these changes.
39    The version number has been expanded to 3 digits as it is clear that the rate
40    of change is not slowing down.
41    
42    
43    Release 7.9 11-Apr-09
44    ---------------------
45    
46    Mostly bugfixes and tidies with just a couple of minor functional additions.
47    
48    
49    Release 7.8 05-Sep-08
50    ---------------------
51    
52    More bug fixes, plus a performance improvement in Unicode character property
53    lookup.
54    
55    
56    Release 7.7 07-May-08
57    ---------------------
58    
59    This is once again mainly a bug-fix release, but there are a couple of new
60    features.
61    
62    
63    Release 7.6 28-Jan-08
64    ---------------------
65    
66    The main reason for having this release so soon after 7.5 is because it fixes a
67    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
68    addition, the CMake configuration files have been brought up to date.
69    
70    
71    Release 7.5 10-Jan-08
72    ---------------------
73    
74    This is mainly a bug-fix release. However the ability to link pcregrep with
75    libz or libbz2 and the ability to link pcretest with libreadline have been
76    added. Also the --line-offsets and --file-offsets options were added to
77    pcregrep.
78    
79    
80    Release 7.4 21-Sep-07
81    ---------------------
82    
83    The only change of specification is the addition of options to control whether
84    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
85    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
86    relocations needed in a shared library. There have also been some documentation
87    updates, in particular, some more information about using CMake to build PCRE
88    has been added to the NON-UNIX-USE file.
89    
90    
91    Release 7.3 28-Aug-07
92    ---------------------
93    
94    Most changes are bug fixes. Some that are not:
95    
96    1. There is some support for Perl 5.10's experimental "backtracking control
97       verbs" such as (*PRUNE).
98    
99    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
100       restrictive in the strings it accepts.
101    
102    3. Checking for potential integer overflow has been made more dynamic, and as a
103       consequence there is no longer a hard limit on the size of a subpattern that
104       has a limited repeat count.
105    
106    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
107       no longer advance by two characters instead of one when an unanchored match
108       fails at CRLF if there are explicit CR or LF matches within the pattern.
109       This gets rid of some anomalous effects that previously occurred.
110    
111    5. Some PCRE-specific settings for varying the newline options at the start of
112       a pattern have been added.
113    
114    
115    Release 7.2 19-Jun-07
116    ---------------------
117    
118    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
119    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
120    and \V).
121    
122    Correction to the notes for 7.1: the note about shared libraries for Windows is
123    wrong. Previously, three libraries were built, but each could function
124    independently. For example, the pcreposix library also included all the
125    functions from the basic pcre library. The change is that the three libraries
126    are no longer independent. They are like the Unix libraries. To use the
127    pcreposix functions, for example, you need to link with both the pcreposix and
128    the basic pcre library.
129    
130    Some more features from Perl 5.10 have been added:
131    
132      (?-n) and (?+n) relative references for recursion and subroutines.
133    
134      (?(-n) and (?(+n) relative references as conditions.
135    
136      \k{name} and \g{name} are synonyms for \k<name>.
137    
138      \K to reset the start of the matched string; for example, (foo)\Kbar
139      matches bar preceded by foo, but only sets bar as the matched string.
140    
141      (?| introduces a group where the capturing parentheses in each alternative
142      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
143      parentheses number 1 in both cases.
144    
145      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
146    
147    
148    Release 7.1 24-Apr-07
149    ---------------------
150    
151    There is only one new feature in this release: a linebreak setting of
152    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
153    recognizes only CRLF, CR, and LF as linebreaks.
154    
155    A few bugs are fixed (see ChangeLog for details), but the major change is a
156    complete re-implementation of the build system. This now has full Autotools
157    support and so is now "standard" in some sense. It should help with compiling
158    PCRE in a wide variety of environments.
159    
160    NOTE: when building shared libraries for Windows, three dlls are now built,
161    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
162    included in a single dll.
163    
164    Another important change is that the dftables auxiliary program is no longer
165    compiled and run at "make" time by default. Instead, a default set of character
166    tables (assuming ASCII coding) is used. If you want to use dftables to generate
167    the character tables as previously, add --enable-rebuild-chartables to the
168    "configure" command. You must do this if you are compiling PCRE to run on a
169    system that uses EBCDIC code.
170    
171    There is a discussion about character tables in the README file. The default is
172    not to use dftables so that that there is no problem when cross-compiling.
173    
174    
175    Release 7.0 19-Dec-06
176  ---------------------  ---------------------
177    
178  This release has a new major number because there have been some internal  This release has a new major number because there have been some internal

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