Updated PCRE source to version 8.32 (bug 5593).
This commit is contained in:
Nicholas Hastings
+183
@@ -1,6 +1,189 @@
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News about PCRE releases
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------------------------
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Release 8.32 30-November-2012
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-----------------------------
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This release fixes a number of bugs, but also has some new features. These are
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the highlights:
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. There is now support for 32-bit character strings and UTF-32. Like the
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16-bit support, this is done by compiling a separate 32-bit library.
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. \X now matches a Unicode extended grapheme cluster.
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. Case-independent matching of Unicode characters that have more than one
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"other case" now makes all three (or more) characters equivalent. This
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applies, for example, to Greek Sigma, which has two lowercase versions.
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. Unicode character properties are updated to Unicode 6.2.0.
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. The EBCDIC support, which had decayed, has had a spring clean.
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. A number of JIT optimizations have been added, which give faster JIT
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execution speed. In addition, a new direct interface to JIT execution is
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available. This bypasses some of the sanity checks of pcre_exec() to give a
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noticeable speed-up.
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. A number of issues in pcregrep have been fixed, making it more compatible
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with GNU grep. In particular, --exclude and --include (and variants) apply
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to all files now, not just those obtained from scanning a directory
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recursively. In Windows environments, the default action for directories is
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now "skip" instead of "read" (which provokes an error).
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. If the --only-matching (-o) option in pcregrep is specified multiple
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times, each one causes appropriate output. For example, -o1 -o2 outputs the
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substrings matched by the 1st and 2nd capturing parentheses. A separating
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string can be specified by --om-separator (default empty).
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. When PCRE is built via Autotools using a version of gcc that has the
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"visibility" feature, it is used to hide internal library functions that are
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not part of the public API.
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Release 8.31 06-July-2012
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-------------------------
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This is mainly a bug-fixing release, with a small number of developments:
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. The JIT compiler now supports partial matching and the (*MARK) and
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(*COMMIT) verbs.
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. PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
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pattern.
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. There should be a performance improvement when using the heap instead of the
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stack for recursion.
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. pcregrep can now be linked with libedit as an alternative to libreadline.
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. pcregrep now has a --file-list option where the list of files to scan is
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given as a file.
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. pcregrep now recognizes binary files and there are related options.
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. The Unicode tables have been updated to 6.1.0.
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As always, the full list of changes is in the ChangeLog file.
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Release 8.30 04-February-2012
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-----------------------------
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Release 8.30 introduces a major new feature: support for 16-bit character
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strings, compiled as a separate library. There are a few changes to the
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8-bit library, in addition to some bug fixes.
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. The pcre_info() function, which has been obsolete for over 10 years, has
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been removed.
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. When a compiled pattern was saved to a file and later reloaded on a host
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with different endianness, PCRE used automatically to swap the bytes in some
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of the data fields. With the advent of the 16-bit library, where more of this
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swapping is needed, it is no longer done automatically. Instead, the bad
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endianness is detected and a specific error is given. The user can then call
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a new function called pcre_pattern_to_host_byte_order() (or an equivalent
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16-bit function) to do the swap.
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. In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
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code points and are now faulted. (They are the so-called "surrogates"
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that are reserved for coding high values in UTF-16.)
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Release 8.21 12-Dec-2011
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------------------------
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This is almost entirely a bug-fix release. The only new feature is the ability
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to obtain the size of the memory used by the JIT compiler.
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Release 8.20 21-Oct-2011
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------------------------
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The main change in this release is the inclusion of Zoltan Herczeg's
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just-in-time compiler support, which can be accessed by building PCRE with
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--enable-jit. Large performance benefits can be had in many situations. 8.20
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also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
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a number of infelicities and differences from Perl.
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Release 8.13 16-Aug-2011
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------------------------
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This is mainly a bug-fix release. There has been a lot of internal refactoring.
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The Unicode tables have been updated. The only new feature in the library is
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the passing of *MARK information to callouts. Some additions have been made to
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pcretest to make testing easier and more comprehensive. There is a new option
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for pcregrep to adjust its internal buffer size.
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Release 8.12 15-Jan-2011
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------------------------
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This release fixes some bugs in pcregrep, one of which caused the tests to fail
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on 64-bit big-endian systems. There are no changes to the code of the library.
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Release 8.11 10-Dec-2010
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------------------------
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A number of bugs in the library and in pcregrep have been fixed. As always, see
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ChangeLog for details. The following are the non-bug-fix changes:
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. Added --match-limit and --recursion-limit to pcregrep.
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. Added an optional parentheses number to the -o and --only-matching options
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of pcregrep.
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. Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
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\B.
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. Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
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bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
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. Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
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START_OPTIMIZE option, which is now allowed at compile time
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Release 8.10 25-Jun-2010
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------------------------
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There are two major additions: support for (*MARK) and friends, and the option
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PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
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opposites) so that they make use of Unicode properties. There are also a number
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of lesser new features, and several bugs have been fixed. A new option,
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--line-buffered, has been added to pcregrep, for use when it is connected to
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pipes.
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Release 8.02 19-Mar-2010
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------------------------
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Another bug-fix release.
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Release 8.01 19-Jan-2010
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------------------------
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This is a bug-fix release. Several bugs in the code itself and some bugs and
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infelicities in the build system have been fixed.
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Release 8.00 19-Oct-09
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----------------------
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Bugs have been fixed in the library and in pcregrep. There are also some
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enhancements. Restrictions on patterns used for partial matching have been
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removed, extra information is given for partial matches, the partial matching
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process has been improved, and an option to make a partial match override a
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full match is available. The "study" process has been enhanced by finding a
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lower bound matching length. Groups with duplicate numbers may now have
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duplicated names without the use of PCRE_DUPNAMES. However, they may not have
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different names. The documentation has been revised to reflect these changes.
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The version number has been expanded to 3 digits as it is clear that the rate
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of change is not slowing down.
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Release 7.9 11-Apr-09
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---------------------
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