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revision 298 by ph10, Thu Jan 10 17:09:12 2008 UTC revision 1335 by ph10, Tue May 28 09:13:59 2013 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4    Release 8.33 28-May-2013
5    --------------------------
6    
7    A number of bugs are fixed, and some performance improvements have been made.
8    There are also some new features, of which these are the most important:
9    
10    .  The behaviour of the backtracking verbs has been rationalized and
11       documented in more detail.
12    
13    .  JIT now supports callouts and all of the backtracking verbs.
14    
15    .  Unicode validation has been updated in the light of Unicode Corrigendum #9,
16       which points out that "non characters" are not "characters that may not
17       appear in Unicode strings" but rather "characters that are reserved for
18       internal use and have only local meaning".
19    
20    .  (*LIMIT_MATCH=d) and (*LIMIT_RECURSION=d) have been added so that the
21       creator of a pattern can specify lower (but not higher) limits for the
22       matching process.
23    
24    .  The PCRE_NEVER_UTF option is available to prevent pattern-writers from using
25       the (*UTF) feature, as this could be a security issue.
26    
27    
28    Release 8.32 30-November-2012
29    -----------------------------
30    
31    This release fixes a number of bugs, but also has some new features. These are
32    the highlights:
33    
34    .  There is now support for 32-bit character strings and UTF-32. Like the
35       16-bit support, this is done by compiling a separate 32-bit library.
36    
37    .  \X now matches a Unicode extended grapheme cluster.
38    
39    .  Case-independent matching of Unicode characters that have more than one
40       "other case" now makes all three (or more) characters equivalent. This
41       applies, for example, to Greek Sigma, which has two lowercase versions.
42    
43    .  Unicode character properties are updated to Unicode 6.2.0.
44    
45    .  The EBCDIC support, which had decayed, has had a spring clean.
46    
47    .  A number of JIT optimizations have been added, which give faster JIT
48       execution speed. In addition, a new direct interface to JIT execution is
49       available. This bypasses some of the sanity checks of pcre_exec() to give a
50       noticeable speed-up.
51    
52    .  A number of issues in pcregrep have been fixed, making it more compatible
53       with GNU grep. In particular, --exclude and --include (and variants) apply
54       to all files now, not just those obtained from scanning a directory
55       recursively. In Windows environments, the default action for directories is
56       now "skip" instead of "read" (which provokes an error).
57    
58    .  If the --only-matching (-o) option in pcregrep is specified multiple
59       times, each one causes appropriate output. For example, -o1 -o2 outputs the
60       substrings matched by the 1st and 2nd capturing parentheses. A separating
61       string can be specified by --om-separator (default empty).
62    
63    .  When PCRE is built via Autotools using a version of gcc that has the
64       "visibility" feature, it is used to hide internal library functions that are
65       not part of the public API.
66    
67    
68    Release 8.31 06-July-2012
69    -------------------------
70    
71    This is mainly a bug-fixing release, with a small number of developments:
72    
73    . The JIT compiler now supports partial matching and the (*MARK) and
74      (*COMMIT) verbs.
75    
76    . PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
77      pattern.
78    
79    . There should be a performance improvement when using the heap instead of the
80      stack for recursion.
81    
82    . pcregrep can now be linked with libedit as an alternative to libreadline.
83    
84    . pcregrep now has a --file-list option where the list of files to scan is
85      given as a file.
86    
87    . pcregrep now recognizes binary files and there are related options.
88    
89    . The Unicode tables have been updated to 6.1.0.
90    
91    As always, the full list of changes is in the ChangeLog file.
92    
93    
94    Release 8.30 04-February-2012
95    -----------------------------
96    
97    Release 8.30 introduces a major new feature: support for 16-bit character
98    strings, compiled as a separate library. There are a few changes to the
99    8-bit library, in addition to some bug fixes.
100    
101    . The pcre_info() function, which has been obsolete for over 10 years, has
102      been removed.
103    
104    . When a compiled pattern was saved to a file and later reloaded on a host
105      with different endianness, PCRE used automatically to swap the bytes in some
106      of the data fields. With the advent of the 16-bit library, where more of this
107      swapping is needed, it is no longer done automatically. Instead, the bad
108      endianness is detected and a specific error is given. The user can then call
109      a new function called pcre_pattern_to_host_byte_order() (or an equivalent
110      16-bit function) to do the swap.
111    
112    . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
113      code points and are now faulted. (They are the so-called "surrogates"
114      that are reserved for coding high values in UTF-16.)
115    
116    
117    Release 8.21 12-Dec-2011
118    ------------------------
119    
120    This is almost entirely a bug-fix release. The only new feature is the ability
121    to obtain the size of the memory used by the JIT compiler.
122    
123    
124    Release 8.20 21-Oct-2011
125    ------------------------
126    
127    The main change in this release is the inclusion of Zoltan Herczeg's
128    just-in-time compiler support, which can be accessed by building PCRE with
129    --enable-jit. Large performance benefits can be had in many situations. 8.20
130    also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
131    a number of infelicities and differences from Perl.
132    
133    
134    Release 8.13 16-Aug-2011
135    ------------------------
136    
137    This is mainly a bug-fix release. There has been a lot of internal refactoring.
138    The Unicode tables have been updated. The only new feature in the library is
139    the passing of *MARK information to callouts. Some additions have been made to
140    pcretest to make testing easier and more comprehensive. There is a new option
141    for pcregrep to adjust its internal buffer size.
142    
143    
144    Release 8.12 15-Jan-2011
145    ------------------------
146    
147    This release fixes some bugs in pcregrep, one of which caused the tests to fail
148    on 64-bit big-endian systems. There are no changes to the code of the library.
149    
150    
151    Release 8.11 10-Dec-2010
152    ------------------------
153    
154    A number of bugs in the library and in pcregrep have been fixed. As always, see
155    ChangeLog for details. The following are the non-bug-fix changes:
156    
157    . Added --match-limit and --recursion-limit to pcregrep.
158    
159    . Added an optional parentheses number to the -o and --only-matching options
160      of pcregrep.
161    
162    . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
163      \B.
164    
165    . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
166      bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
167    
168    . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
169      START_OPTIMIZE option, which is now allowed at compile time
170    
171    
172    Release 8.10 25-Jun-2010
173    ------------------------
174    
175    There are two major additions: support for (*MARK) and friends, and the option
176    PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
177    opposites) so that they make use of Unicode properties. There are also a number
178    of lesser new features, and several bugs have been fixed. A new option,
179    --line-buffered, has been added to pcregrep, for use when it is connected to
180    pipes.
181    
182    
183    Release 8.02 19-Mar-2010
184    ------------------------
185    
186    Another bug-fix release.
187    
188    
189    Release 8.01 19-Jan-2010
190    ------------------------
191    
192    This is a bug-fix release. Several bugs in the code itself and some bugs and
193    infelicities in the build system have been fixed.
194    
195    
196    Release 8.00 19-Oct-09
197    ----------------------
198    
199    Bugs have been fixed in the library and in pcregrep. There are also some
200    enhancements. Restrictions on patterns used for partial matching have been
201    removed, extra information is given for partial matches, the partial matching
202    process has been improved, and an option to make a partial match override a
203    full match is available. The "study" process has been enhanced by finding a
204    lower bound matching length. Groups with duplicate numbers may now have
205    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
206    different names. The documentation has been revised to reflect these changes.
207    The version number has been expanded to 3 digits as it is clear that the rate
208    of change is not slowing down.
209    
210    
211    Release 7.9 11-Apr-09
212    ---------------------
213    
214    Mostly bugfixes and tidies with just a couple of minor functional additions.
215    
216    
217    Release 7.8 05-Sep-08
218    ---------------------
219    
220    More bug fixes, plus a performance improvement in Unicode character property
221    lookup.
222    
223    
224    Release 7.7 07-May-08
225    ---------------------
226    
227    This is once again mainly a bug-fix release, but there are a couple of new
228    features.
229    
230    
231    Release 7.6 28-Jan-08
232    ---------------------
233    
234    The main reason for having this release so soon after 7.5 is because it fixes a
235    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
236    addition, the CMake configuration files have been brought up to date.
237    
238    
239  Release 7.5 10-Jan-08  Release 7.5 10-Jan-08
240  ---------------------  ---------------------
241    
# Line 380  some of the new functionality in Perl 5. Line 615  some of the new functionality in Perl 5.
615  Another (I hope this is the last!) change has been made to the API for the  Another (I hope this is the last!) change has been made to the API for the
616  pcre_compile() function. An additional argument has been added to make it  pcre_compile() function. An additional argument has been added to make it
617  possible to pass over a pointer to character tables built in the current  possible to pass over a pointer to character tables built in the current
618  locale by pcre_maketables(). To use the default tables, this new arguement  locale by pcre_maketables(). To use the default tables, this new argument
619  should be passed as NULL.  should be passed as NULL.
620    
621            IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05            IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05

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