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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4    Release 8.30
5    ------------
6    
7  Release 7.1 12-Mar-07  Release 8.30 introduces a major new feature: support for 16-bit character
8    strings, compiled as a separate library. There are a few changes to the
9    8-bit library, in addition to some bug fixes.
10    
11    . The pcre_info() function, which has been obsolete for over 10 years, has
12      been removed.
13    
14    . When a compiled pattern was saved to a file and later reloaded on a host
15      with different endianness, PCRE used automatically to swap the bytes in some
16      of the data fields. With the advent of the 16-bit library, where more of this
17      swapping is needed, it is no longer done automatically. Instead, the bad
18      endianness is detected and a specific error is given. The user can then call
19      a new function called pcre_pattern_to_host_byte_order() (or an equivalent
20      16-bit function) to do the swap.
21    
22    . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
23      code points and are now faulted. (They are the so-called "surrogates"
24      that are reserved for coding high values in UTF-16.)
25    
26    
27    Release 8.21 12-Dec-2011
28    ------------------------
29    
30    This is almost entirely a bug-fix release. The only new feature is the ability
31    to obtain the size of the memory used by the JIT compiler.
32    
33    
34    Release 8.20 21-Oct-2011
35    ------------------------
36    
37    The main change in this release is the inclusion of Zoltan Herczeg's
38    just-in-time compiler support, which can be accessed by building PCRE with
39    --enable-jit. Large performance benefits can be had in many situations. 8.20
40    also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
41    a number of infelicities and differences from Perl.
42    
43    
44    Release 8.13 16-Aug-2011
45    ------------------------
46    
47    This is mainly a bug-fix release. There has been a lot of internal refactoring.
48    The Unicode tables have been updated. The only new feature in the library is
49    the passing of *MARK information to callouts. Some additions have been made to
50    pcretest to make testing easier and more comprehensive. There is a new option
51    for pcregrep to adjust its internal buffer size.
52    
53    
54    Release 8.12 15-Jan-2011
55    ------------------------
56    
57    This release fixes some bugs in pcregrep, one of which caused the tests to fail
58    on 64-bit big-endian systems. There are no changes to the code of the library.
59    
60    
61    Release 8.11 10-Dec-2010
62    ------------------------
63    
64    A number of bugs in the library and in pcregrep have been fixed. As always, see
65    ChangeLog for details. The following are the non-bug-fix changes:
66    
67    . Added --match-limit and --recursion-limit to pcregrep.
68    
69    . Added an optional parentheses number to the -o and --only-matching options
70      of pcregrep.
71    
72    . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
73      \B.
74    
75    . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
76      bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
77    
78    . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
79      START_OPTIMIZE option, which is now allowed at compile time
80    
81    
82    Release 8.10 25-Jun-2010
83    ------------------------
84    
85    There are two major additions: support for (*MARK) and friends, and the option
86    PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
87    opposites) so that they make use of Unicode properties. There are also a number
88    of lesser new features, and several bugs have been fixed. A new option,
89    --line-buffered, has been added to pcregrep, for use when it is connected to
90    pipes.
91    
92    
93    Release 8.02 19-Mar-2010
94    ------------------------
95    
96    Another bug-fix release.
97    
98    
99    Release 8.01 19-Jan-2010
100    ------------------------
101    
102    This is a bug-fix release. Several bugs in the code itself and some bugs and
103    infelicities in the build system have been fixed.
104    
105    
106    Release 8.00 19-Oct-09
107    ----------------------
108    
109    Bugs have been fixed in the library and in pcregrep. There are also some
110    enhancements. Restrictions on patterns used for partial matching have been
111    removed, extra information is given for partial matches, the partial matching
112    process has been improved, and an option to make a partial match override a
113    full match is available. The "study" process has been enhanced by finding a
114    lower bound matching length. Groups with duplicate numbers may now have
115    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
116    different names. The documentation has been revised to reflect these changes.
117    The version number has been expanded to 3 digits as it is clear that the rate
118    of change is not slowing down.
119    
120    
121    Release 7.9 11-Apr-09
122  ---------------------  ---------------------
123    
124  There are no new features in this release. A few bugs are fixed (see ChangeLog  Mostly bugfixes and tidies with just a couple of minor functional additions.
125  for details), but the major change is a complete re-implementation of the build  
126  system. This now has full Autotools support and so is now "standard" in some  
127  sense. It should help with compiling PCRE in a wide variety of environments.  Release 7.8 05-Sep-08
128    ---------------------
129    
130    More bug fixes, plus a performance improvement in Unicode character property
131    lookup.
132    
133    
134    Release 7.7 07-May-08
135    ---------------------
136    
137    This is once again mainly a bug-fix release, but there are a couple of new
138    features.
139    
140    
141    Release 7.6 28-Jan-08
142    ---------------------
143    
144    The main reason for having this release so soon after 7.5 is because it fixes a
145    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
146    addition, the CMake configuration files have been brought up to date.
147    
148    
149    Release 7.5 10-Jan-08
150    ---------------------
151    
152    This is mainly a bug-fix release. However the ability to link pcregrep with
153    libz or libbz2 and the ability to link pcretest with libreadline have been
154    added. Also the --line-offsets and --file-offsets options were added to
155    pcregrep.
156    
157    
158    Release 7.4 21-Sep-07
159    ---------------------
160    
161    The only change of specification is the addition of options to control whether
162    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
163    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
164    relocations needed in a shared library. There have also been some documentation
165    updates, in particular, some more information about using CMake to build PCRE
166    has been added to the NON-UNIX-USE file.
167    
168    
169    Release 7.3 28-Aug-07
170    ---------------------
171    
172    Most changes are bug fixes. Some that are not:
173    
174    1. There is some support for Perl 5.10's experimental "backtracking control
175       verbs" such as (*PRUNE).
176    
177    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
178       restrictive in the strings it accepts.
179    
180    3. Checking for potential integer overflow has been made more dynamic, and as a
181       consequence there is no longer a hard limit on the size of a subpattern that
182       has a limited repeat count.
183    
184    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
185       no longer advance by two characters instead of one when an unanchored match
186       fails at CRLF if there are explicit CR or LF matches within the pattern.
187       This gets rid of some anomalous effects that previously occurred.
188    
189    5. Some PCRE-specific settings for varying the newline options at the start of
190       a pattern have been added.
191    
192    
193    Release 7.2 19-Jun-07
194    ---------------------
195    
196    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
197    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
198    and \V).
199    
200    Correction to the notes for 7.1: the note about shared libraries for Windows is
201    wrong. Previously, three libraries were built, but each could function
202    independently. For example, the pcreposix library also included all the
203    functions from the basic pcre library. The change is that the three libraries
204    are no longer independent. They are like the Unix libraries. To use the
205    pcreposix functions, for example, you need to link with both the pcreposix and
206    the basic pcre library.
207    
208    Some more features from Perl 5.10 have been added:
209    
210      (?-n) and (?+n) relative references for recursion and subroutines.
211    
212      (?(-n) and (?(+n) relative references as conditions.
213    
214      \k{name} and \g{name} are synonyms for \k<name>.
215    
216      \K to reset the start of the matched string; for example, (foo)\Kbar
217      matches bar preceded by foo, but only sets bar as the matched string.
218    
219      (?| introduces a group where the capturing parentheses in each alternative
220      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
221      parentheses number 1 in both cases.
222    
223      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
224    
225    
226    Release 7.1 24-Apr-07
227    ---------------------
228    
229    There is only one new feature in this release: a linebreak setting of
230    PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
231    recognizes only CRLF, CR, and LF as linebreaks.
232    
233    A few bugs are fixed (see ChangeLog for details), but the major change is a
234    complete re-implementation of the build system. This now has full Autotools
235    support and so is now "standard" in some sense. It should help with compiling
236    PCRE in a wide variety of environments.
237    
238    NOTE: when building shared libraries for Windows, three dlls are now built,
239    called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
240    included in a single dll.
241    
242    Another important change is that the dftables auxiliary program is no longer
243    compiled and run at "make" time by default. Instead, a default set of character
244    tables (assuming ASCII coding) is used. If you want to use dftables to generate
245    the character tables as previously, add --enable-rebuild-chartables to the
246    "configure" command. You must do this if you are compiling PCRE to run on a
247    system that uses EBCDIC code.
248    
249    There is a discussion about character tables in the README file. The default is
250    not to use dftables so that that there is no problem when cross-compiling.
251    
252    
253  Release 7.0 19-Dec-06  Release 7.0 19-Dec-06

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