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 News about PCRE releases  News about PCRE releases
 ------------------------  ------------------------
   
   Note that this library (now called PCRE1) is now being maintained for bug fixes
   only. New projects are advised to use the new PCRE2 libraries.
   
   
   Release 8.43 23-February-2019
   -----------------------------
   
   This is a bug-fix release.
   
   
   Release 8.42 20-March-2018
   --------------------------
   
   This is a bug-fix release.
   
   
   Release 8.41 13-June-2017
   -------------------------
   
   This is a bug-fix release.
   
   
   Release 8.40 11-January-2017
   ----------------------------
   
   This is a bug-fix release.
   
   
   Release 8.39 14-June-2016
   -------------------------
   
   Some appropriate PCRE2 JIT improvements have been retro-fitted to PCRE1. Apart
   from that, this is another bug-fix release. Note that this library (now called
   PCRE1) is now being maintained for bug fixes only. New projects are advised to
   use the new PCRE2 libraries.
   
   
   Release 8.38 23-November-2015
   -----------------------------
   
   This is bug-fix release. Note that this library (now called PCRE1) is now being
   maintained for bug fixes only. New projects are advised to use the new PCRE2
   libraries.
   
   
   Release 8.37 28-April-2015
   --------------------------
   
   This is bug-fix release. Note that this library (now called PCRE1) is now being
   maintained for bug fixes only. New projects are advised to use the new PCRE2
   libraries.
   
   
   Release 8.36 26-September-2014
   ------------------------------
   
   This is primarily a bug-fix release. However, in addition, the Unicode data
   tables have been updated to Unicode 7.0.0.
   
   
   Release 8.35 04-April-2014
   --------------------------
   
   There have been performance improvements for classes containing non-ASCII
   characters and the "auto-possessification" feature has been extended. Other
   minor improvements have been implemented and bugs fixed. There is a new callout
   feature to enable applications to do detailed stack checks at compile time, to
   avoid running out of stack for deeply nested parentheses. The JIT compiler has
   been extended with experimental support for ARM-64, MIPS-64, and PPC-LE.
   
   
   Release 8.34 15-December-2013
   -----------------------------
   
   As well as fixing the inevitable bugs, performance has been improved by
   refactoring and extending the amount of "auto-possessification" that PCRE does.
   Other notable changes:
   
   .  Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
      an empty string. If it can, pcretest shows this in its information output.
   
   .  A back reference to a named subpattern when there is more than one of the
      same name now checks them in the order in which they appear in the pattern.
      The first one that is set is used for the reference. Previously only the
      first one was inspected. This change makes PCRE more compatible with Perl.
   
   .  Unicode character properties were updated from Unicode 6.3.0.
   
   .  The character VT has been added to the set of characters that match \s and
      are generally treated as white space, following this same change in Perl
      5.18. There is now no difference between "Perl space" and "POSIX space".
   
   .  Perl has changed its handling of \8 and \9. If there is no previously
      encountered capturing group of those numbers, they are treated as the
      literal characters 8 and 9 instead of a binary zero followed by the
      literals. PCRE now does the same.
   
   .  Following Perl, added \o{} to specify codepoints in octal, making it
      possible to specify values greater than 0777 and also making them
      unambiguous.
   
   .  In UCP mode, \s was not matching two of the characters that Perl matches,
      namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
      were matched by \h.
   
   .  Add JIT support for the 64 bit TileGX architecture.
   
   .  Upgraded the handling of the POSIX classes [:graph:], [:print:], and
      [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
      does in Unicode mode.
   
   .  Perl no longer allows group names to start with digits, so I have made this
      change also in PCRE.
   
   .  Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
      mean "start of word" and "end of word", respectively, as a transition aid.
   
   
   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
   ------------------------
   
   This release fixes some bugs in pcregrep, one of which caused the tests to fail
   on 64-bit big-endian systems. There are no changes to the code of the library.
   
   
   Release 8.11 10-Dec-2010
   ------------------------
   
   A number of bugs in the library and in pcregrep have been fixed. As always, see
   ChangeLog for details. The following are the non-bug-fix changes:
   
   . Added --match-limit and --recursion-limit to pcregrep.
   
   . Added an optional parentheses number to the -o and --only-matching options
     of pcregrep.
   
   . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
     \B.
   
   . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
     bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
   
   . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
     START_OPTIMIZE option, which is now allowed at compile time
   
   
   Release 8.10 25-Jun-2010
   ------------------------
   
   There are two major additions: support for (*MARK) and friends, and the option
   PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
   opposites) so that they make use of Unicode properties. There are also a number
   of lesser new features, and several bugs have been fixed. A new option,
   --line-buffered, has been added to pcregrep, for use when it is connected to
   pipes.
   
   
   Release 8.02 19-Mar-2010
   ------------------------
   
   Another bug-fix release.
   
   
   Release 8.01 19-Jan-2010
   ------------------------
   
   This is a bug-fix release. Several bugs in the code itself and some bugs and
   infelicities in the build system have been fixed.
   
   
   Release 8.00 19-Oct-09
   ----------------------
   
   Bugs have been fixed in the library and in pcregrep. There are also some
   enhancements. Restrictions on patterns used for partial matching have been
   removed, extra information is given for partial matches, the partial matching
   process has been improved, and an option to make a partial match override a
   full match is available. The "study" process has been enhanced by finding a
   lower bound matching length. Groups with duplicate numbers may now have
   duplicated names without the use of PCRE_DUPNAMES. However, they may not have
   different names. The documentation has been revised to reflect these changes.
   The version number has been expanded to 3 digits as it is clear that the rate
   of change is not slowing down.
   
   
   Release 7.9 11-Apr-09
   ---------------------
   
   Mostly bugfixes and tidies with just a couple of minor functional additions.
   
   
   Release 7.8 05-Sep-08
   ---------------------
   
   More bug fixes, plus a performance improvement in Unicode character property
   lookup.
   
   
 Release 7.7 07-May-08  Release 7.7 07-May-08
 ---------------------  ---------------------
Line 396  some of the new functionality in Perl 5. Line 733  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.1.1  
changed lines
  Added in v.1.9

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