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 News about PCRE releases  News about PCRE releases
 ------------------------  ------------------------
   
   Release 8.33 28-May-2013
   --------------------------
   
   A number of bugs are fixed, and some performance improvements have been made.
   There are also some new features, of which these are the most important:
   
   .  The behaviour of the backtracking verbs has been rationalized and
      documented in more detail.
   
   .  JIT now supports callouts and all of the backtracking verbs.
   
   .  Unicode validation has been updated in the light of Unicode Corrigendum #9,
      which points out that "non characters" are not "characters that may not
      appear in Unicode strings" but rather "characters that are reserved for
      internal use and have only local meaning".
   
   .  (*LIMIT_MATCH=d) and (*LIMIT_RECURSION=d) have been added so that the
      creator of a pattern can specify lower (but not higher) limits for the
      matching process.
   
   .  The PCRE_NEVER_UTF option is available to prevent pattern-writers from using
      the (*UTF) feature, as this could be a security issue.
   
   
   Release 8.32 30-November-2012
   -----------------------------
   
   This release fixes a number of bugs, but also has some new features. These are
   the highlights:
   
   .  There is now support for 32-bit character strings and UTF-32. Like the
      16-bit support, this is done by compiling a separate 32-bit library.
   
   .  \X now matches a Unicode extended grapheme cluster.
   
   .  Case-independent matching of Unicode characters that have more than one
      "other case" now makes all three (or more) characters equivalent. This
      applies, for example, to Greek Sigma, which has two lowercase versions.
   
   .  Unicode character properties are updated to Unicode 6.2.0.
   
   .  The EBCDIC support, which had decayed, has had a spring clean.
   
   .  A number of JIT optimizations have been added, which give faster JIT
      execution speed. In addition, a new direct interface to JIT execution is
      available. This bypasses some of the sanity checks of pcre_exec() to give a
      noticeable speed-up.
   
   .  A number of issues in pcregrep have been fixed, making it more compatible
      with GNU grep. In particular, --exclude and --include (and variants) apply
      to all files now, not just those obtained from scanning a directory
      recursively. In Windows environments, the default action for directories is
      now "skip" instead of "read" (which provokes an error).
   
   .  If the --only-matching (-o) option in pcregrep is specified multiple
      times, each one causes appropriate output. For example, -o1 -o2 outputs the
      substrings matched by the 1st and 2nd capturing parentheses. A separating
      string can be specified by --om-separator (default empty).
   
   .  When PCRE is built via Autotools using a version of gcc that has the
      "visibility" feature, it is used to hide internal library functions that are
      not part of the public API.
   
   
   Release 8.31 06-July-2012
   -------------------------
   
   This is mainly a bug-fixing release, with a small number of developments:
   
   . The JIT compiler now supports partial matching and the (*MARK) and
     (*COMMIT) verbs.
   
   . PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
     pattern.
   
   . There should be a performance improvement when using the heap instead of the
     stack for recursion.
   
   . pcregrep can now be linked with libedit as an alternative to libreadline.
   
   . pcregrep now has a --file-list option where the list of files to scan is
     given as a file.
   
   . pcregrep now recognizes binary files and there are related options.
   
   . The Unicode tables have been updated to 6.1.0.
   
   As always, the full list of changes is in the ChangeLog file.
   
   
   Release 8.30 04-February-2012
   -----------------------------
   
   Release 8.30 introduces a major new feature: support for 16-bit character
   strings, compiled as a separate library. There are a few changes to the
   8-bit library, in addition to some bug fixes.
   
   . The pcre_info() function, which has been obsolete for over 10 years, has
     been removed.
   
   . When a compiled pattern was saved to a file and later reloaded on a host
     with different endianness, PCRE used automatically to swap the bytes in some
     of the data fields. With the advent of the 16-bit library, where more of this
     swapping is needed, it is no longer done automatically. Instead, the bad
     endianness is detected and a specific error is given. The user can then call
     a new function called pcre_pattern_to_host_byte_order() (or an equivalent
     16-bit function) to do the swap.
   
   . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
     code points and are now faulted. (They are the so-called "surrogates"
     that are reserved for coding high values in UTF-16.)
   
   
   Release 8.21 12-Dec-2011
   ------------------------
   
   This is almost entirely a bug-fix release. The only new feature is the ability
   to obtain the size of the memory used by the JIT compiler.
   
   
   Release 8.20 21-Oct-2011
   ------------------------
   
   The main change in this release is the inclusion of Zoltan Herczeg's
   just-in-time compiler support, which can be accessed by building PCRE with
   --enable-jit. Large performance benefits can be had in many situations. 8.20
   also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
   a number of infelicities and differences from Perl.
   
   
   Release 8.13 16-Aug-2011
   ------------------------
   
   This is mainly a bug-fix release. There has been a lot of internal refactoring.
   The Unicode tables have been updated. The only new feature in the library is
   the passing of *MARK information to callouts. Some additions have been made to
   pcretest to make testing easier and more comprehensive. There is a new option
   for pcregrep to adjust its internal buffer size.
   
   
 Release 8.12 15-Jan-2011  Release 8.12 15-Jan-2011
 ------------------------  ------------------------
   
Line 475  some of the new functionality in Perl 5. Line 615  some of the new functionality in Perl 5.
 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
 pcre_compile() function. An additional argument has been added to make it  pcre_compile() function. An additional argument has been added to make it
 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
 locale by pcre_maketables(). To use the default tables, this new arguement  locale by pcre_maketables(). To use the default tables, this new argument
 should be passed as NULL.  should be passed as NULL.
   
           IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05            IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05
Removed from v.1.5  
changed lines
  Added in v.1.7

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