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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4  Release 8.20  Release 8.33 28-April-2013
5  ------------  --------------------------
6    
7  The main change in this release is the inclusion of Zoltan Herczeg's  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  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  --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  also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
131  a couple of infelicities.  a number of infelicities and differences from Perl.
132    
133    
134  Release 8.13 16-Aug-2011  Release 8.13 16-Aug-2011

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