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revision 788 by ph10, Tue Dec 6 15:38:01 2011 UTC revision 1221 by ph10, Sun Nov 11 20:27:03 2012 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4  Release 8.21 05-Dec-2011  Release 8.32 12-November-2012
5    -----------------------------
6    
7    This release fixes a number of bugs, but also has some new features. These are
8    the highlights:
9    
10    .  There is now support for 32-bit character strings and UTF-32. Like the
11       16-bit support, this is done by compiling a separate 32-bit library.
12    
13    .  \X now matches a Unicode extended grapheme cluster.
14    
15    .  Case-independent matching of Unicode characters that have more than one
16       "other case" now makes all three (or more) characters equivalent. This
17       applies, for example, to Greek Sigma, which has two lowercase versions.
18    
19    .  Unicode character properties are updated to Unicode 6.2.0.
20    
21    .  The EBCDIC support, which had decayed, has had a spring clean.
22    
23    .  A number of JIT optimizations have been added, which give faster JIT
24       execution speed. In addition, a new direct interface to JIT execution is
25       available. This bypasses some of the sanity checks of pcre_exec() to give a
26       noticeable speed-up.
27    
28    .  A number of issues in pcregrep have been fixed, making it more compatible
29       with GNU grep. In particular, --exclude and --include (and variants) apply
30       to all files now, not just those obtained from scanning a directory
31       recursively. In Windows environments, the default action for directories is
32       now "skip" instead of "read" (which provokes an error).
33    
34    .  If the --only-matching (-o) option in pcregrep is specified multiple
35       times, each one causes appropriate output. For example, -o1 -o2 outputs the
36       substrings matched by the 1st and 2nd capturing parentheses. A separating
37       string can be specified by --om-separator (default empty).
38    
39    .  When PCRE is built via Autotools using a version of gcc that has the
40       "visibility" feature, it is used to hide internal library functions that are
41       not part of the public API.
42    
43    
44    Release 8.31 06-July-2012
45    -------------------------
46    
47    This is mainly a bug-fixing release, with a small number of developments:
48    
49    . The JIT compiler now supports partial matching and the (*MARK) and
50      (*COMMIT) verbs.
51    
52    . PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
53      pattern.
54    
55    . There should be a performance improvement when using the heap instead of the
56      stack for recursion.
57    
58    . pcregrep can now be linked with libedit as an alternative to libreadline.
59    
60    . pcregrep now has a --file-list option where the list of files to scan is
61      given as a file.
62    
63    . pcregrep now recognizes binary files and there are related options.
64    
65    . The Unicode tables have been updated to 6.1.0.
66    
67    As always, the full list of changes is in the ChangeLog file.
68    
69    
70    Release 8.30 04-February-2012
71    -----------------------------
72    
73    Release 8.30 introduces a major new feature: support for 16-bit character
74    strings, compiled as a separate library. There are a few changes to the
75    8-bit library, in addition to some bug fixes.
76    
77    . The pcre_info() function, which has been obsolete for over 10 years, has
78      been removed.
79    
80    . When a compiled pattern was saved to a file and later reloaded on a host
81      with different endianness, PCRE used automatically to swap the bytes in some
82      of the data fields. With the advent of the 16-bit library, where more of this
83      swapping is needed, it is no longer done automatically. Instead, the bad
84      endianness is detected and a specific error is given. The user can then call
85      a new function called pcre_pattern_to_host_byte_order() (or an equivalent
86      16-bit function) to do the swap.
87    
88    . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
89      code points and are now faulted. (They are the so-called "surrogates"
90      that are reserved for coding high values in UTF-16.)
91    
92    
93    Release 8.21 12-Dec-2011
94  ------------------------  ------------------------
95    
96  This is mostly a bug-fix release. The only new feature is the ability to obtain  This is almost entirely a bug-fix release. The only new feature is the ability
97  the memory used by the JIT compiler.  to obtain the size of the memory used by the JIT compiler.
98    
99    
100  Release 8.20 21-Oct-2011  Release 8.20 21-Oct-2011

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