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revision 93 by nigel, Sat Feb 24 21:41:42 2007 UTC revision 579 by ph10, Wed Nov 24 17:39:25 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 8.11 24-Nov-2010
5    ------------------------
6    
7    A number of bugs in the library and in pcregrep have been fixed. As always, see
8    ChangeLog for details. The following are the non-bug-fix changes:
9    
10    . Added --match-limit and --recursion-limit to pcregrep.
11    
12    . Added an optional parentheses number to the -o and --only-matching options
13      of pcregrep.
14    
15    . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
16      \B.
17    
18    . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
19      bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
20    
21    . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
22      START_OPTIMIZE option, which is now allowed at compile time
23    
24    
25    Release 8.10 25-Jun-2010
26    ------------------------
27    
28    There are two major additions: support for (*MARK) and friends, and the option
29    PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
30    opposites) so that they make use of Unicode properties. There are also a number
31    of lesser new features, and several bugs have been fixed. A new option,
32    --line-buffered, has been added to pcregrep, for use when it is connected to
33    pipes.
34    
35    
36    Release 8.02 19-Mar-2010
37    ------------------------
38    
39    Another bug-fix release.
40    
41    
42    Release 8.01 19-Jan-2010
43    ------------------------
44    
45    This is a bug-fix release. Several bugs in the code itself and some bugs and
46    infelicities in the build system have been fixed.
47    
48    
49    Release 8.00 19-Oct-09
50    ----------------------
51    
52    Bugs have been fixed in the library and in pcregrep. There are also some
53    enhancements. Restrictions on patterns used for partial matching have been
54    removed, extra information is given for partial matches, the partial matching
55    process has been improved, and an option to make a partial match override a
56    full match is available. The "study" process has been enhanced by finding a
57    lower bound matching length. Groups with duplicate numbers may now have
58    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
59    different names. The documentation has been revised to reflect these changes.
60    The version number has been expanded to 3 digits as it is clear that the rate
61    of change is not slowing down.
62    
63    
64    Release 7.9 11-Apr-09
65    ---------------------
66    
67    Mostly bugfixes and tidies with just a couple of minor functional additions.
68    
69    
70    Release 7.8 05-Sep-08
71    ---------------------
72    
73    More bug fixes, plus a performance improvement in Unicode character property
74    lookup.
75    
76    
77    Release 7.7 07-May-08
78    ---------------------
79    
80    This is once again mainly a bug-fix release, but there are a couple of new
81    features.
82    
83    
84    Release 7.6 28-Jan-08
85    ---------------------
86    
87    The main reason for having this release so soon after 7.5 is because it fixes a
88    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
89    addition, the CMake configuration files have been brought up to date.
90    
91    
92    Release 7.5 10-Jan-08
93    ---------------------
94    
95    This is mainly a bug-fix release. However the ability to link pcregrep with
96    libz or libbz2 and the ability to link pcretest with libreadline have been
97    added. Also the --line-offsets and --file-offsets options were added to
98    pcregrep.
99    
100    
101    Release 7.4 21-Sep-07
102    ---------------------
103    
104    The only change of specification is the addition of options to control whether
105    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
106    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
107    relocations needed in a shared library. There have also been some documentation
108    updates, in particular, some more information about using CMake to build PCRE
109    has been added to the NON-UNIX-USE file.
110    
111    
112    Release 7.3 28-Aug-07
113    ---------------------
114    
115    Most changes are bug fixes. Some that are not:
116    
117    1. There is some support for Perl 5.10's experimental "backtracking control
118       verbs" such as (*PRUNE).
119    
120    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
121       restrictive in the strings it accepts.
122    
123    3. Checking for potential integer overflow has been made more dynamic, and as a
124       consequence there is no longer a hard limit on the size of a subpattern that
125       has a limited repeat count.
126    
127    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
128       no longer advance by two characters instead of one when an unanchored match
129       fails at CRLF if there are explicit CR or LF matches within the pattern.
130       This gets rid of some anomalous effects that previously occurred.
131    
132    5. Some PCRE-specific settings for varying the newline options at the start of
133       a pattern have been added.
134    
135    
136    Release 7.2 19-Jun-07
137    ---------------------
138    
139    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
140    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
141    and \V).
142    
143    Correction to the notes for 7.1: the note about shared libraries for Windows is
144    wrong. Previously, three libraries were built, but each could function
145    independently. For example, the pcreposix library also included all the
146    functions from the basic pcre library. The change is that the three libraries
147    are no longer independent. They are like the Unix libraries. To use the
148    pcreposix functions, for example, you need to link with both the pcreposix and
149    the basic pcre library.
150    
151    Some more features from Perl 5.10 have been added:
152    
153      (?-n) and (?+n) relative references for recursion and subroutines.
154    
155      (?(-n) and (?(+n) relative references as conditions.
156    
157      \k{name} and \g{name} are synonyms for \k<name>.
158    
159      \K to reset the start of the matched string; for example, (foo)\Kbar
160      matches bar preceded by foo, but only sets bar as the matched string.
161    
162      (?| introduces a group where the capturing parentheses in each alternative
163      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
164      parentheses number 1 in both cases.
165    
166      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
167    
168    
169    Release 7.1 24-Apr-07
170    ---------------------
171    
172    There is only one new feature in this release: a linebreak setting of
173    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
174    recognizes only CRLF, CR, and LF as linebreaks.
175    
176    A few bugs are fixed (see ChangeLog for details), but the major change is a
177    complete re-implementation of the build system. This now has full Autotools
178    support and so is now "standard" in some sense. It should help with compiling
179    PCRE in a wide variety of environments.
180    
181    NOTE: when building shared libraries for Windows, three dlls are now built,
182    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
183    included in a single dll.
184    
185    Another important change is that the dftables auxiliary program is no longer
186    compiled and run at "make" time by default. Instead, a default set of character
187    tables (assuming ASCII coding) is used. If you want to use dftables to generate
188    the character tables as previously, add --enable-rebuild-chartables to the
189    "configure" command. You must do this if you are compiling PCRE to run on a
190    system that uses EBCDIC code.
191    
192    There is a discussion about character tables in the README file. The default is
193    not to use dftables so that that there is no problem when cross-compiling.
194    
195    
196    Release 7.0 19-Dec-06
197  ---------------------  ---------------------
198    
199  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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