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News about PCRE releases |
News about PCRE releases |
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Release 8.20 |
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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 couple of infelicities. |
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Release 8.13 16-Aug-2011 |
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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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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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Mostly bugfixes and tidies with just a couple of minor functional additions. |
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Release 7.8 05-Sep-08 |
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More bug fixes, plus a performance improvement in Unicode character property |
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lookup. |
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Release 7.7 07-May-08 |
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This is once again mainly a bug-fix release, but there are a couple of new |
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features. |
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Release 7.6 28-Jan-08 |
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The main reason for having this release so soon after 7.5 is because it fixes a |
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potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In |
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addition, the CMake configuration files have been brought up to date. |
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Release 7.5 10-Jan-08 |
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This is mainly a bug-fix release. However the ability to link pcregrep with |
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libz or libbz2 and the ability to link pcretest with libreadline have been |
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added. Also the --line-offsets and --file-offsets options were added to |
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pcregrep. |
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Release 7.4 21-Sep-07 |
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The only change of specification is the addition of options to control whether |
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\R matches any Unicode line ending (the default) or just CR, LF, and CRLF. |
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Otherwise, the changes are bug fixes and a refactoring to reduce the number of |
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relocations needed in a shared library. There have also been some documentation |
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updates, in particular, some more information about using CMake to build PCRE |
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has been added to the NON-UNIX-USE file. |
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Release 7.3 28-Aug-07 |
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Most changes are bug fixes. Some that are not: |
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1. There is some support for Perl 5.10's experimental "backtracking control |
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verbs" such as (*PRUNE). |
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2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more |
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restrictive in the strings it accepts. |
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3. Checking for potential integer overflow has been made more dynamic, and as a |
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consequence there is no longer a hard limit on the size of a subpattern that |
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has a limited repeat count. |
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4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec() |
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no longer advance by two characters instead of one when an unanchored match |
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fails at CRLF if there are explicit CR or LF matches within the pattern. |
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This gets rid of some anomalous effects that previously occurred. |
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5. Some PCRE-specific settings for varying the newline options at the start of |
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a pattern have been added. |
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Release 7.2 19-Jun-07 |
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WARNING: saved patterns that were compiled by earlier versions of PCRE must be |
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recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v, |
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and \V). |
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Correction to the notes for 7.1: the note about shared libraries for Windows is |
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wrong. Previously, three libraries were built, but each could function |
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independently. For example, the pcreposix library also included all the |
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functions from the basic pcre library. The change is that the three libraries |
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are no longer independent. They are like the Unix libraries. To use the |
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pcreposix functions, for example, you need to link with both the pcreposix and |
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the basic pcre library. |
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Some more features from Perl 5.10 have been added: |
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(?-n) and (?+n) relative references for recursion and subroutines. |
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(?(-n) and (?(+n) relative references as conditions. |
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\k{name} and \g{name} are synonyms for \k<name>. |
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\K to reset the start of the matched string; for example, (foo)\Kbar |
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matches bar preceded by foo, but only sets bar as the matched string. |
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(?| introduces a group where the capturing parentheses in each alternative |
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start from the same number; for example, (?|(abc)|(xyz)) sets capturing |
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parentheses number 1 in both cases. |
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\h, \H, \v, \V match horizontal and vertical whitespace, respectively. |
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Release 7.1 24-Apr-07 |
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There is only one new feature in this release: a linebreak setting of |
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PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which |
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recognizes only CRLF, CR, and LF as linebreaks. |
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A few bugs are fixed (see ChangeLog for details), but the major change is a |
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complete re-implementation of the build system. This now has full Autotools |
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support and so is now "standard" in some sense. It should help with compiling |
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PCRE in a wide variety of environments. |
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NOTE: when building shared libraries for Windows, three dlls are now built, |
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called libpcre, libpcreposix, and libpcrecpp. Previously, everything was |
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included in a single dll. |
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Another important change is that the dftables auxiliary program is no longer |
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compiled and run at "make" time by default. Instead, a default set of character |
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tables (assuming ASCII coding) is used. If you want to use dftables to generate |
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the character tables as previously, add --enable-rebuild-chartables to the |
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"configure" command. You must do this if you are compiling PCRE to run on a |
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system that uses EBCDIC code. |
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There is a discussion about character tables in the README file. The default is |
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not to use dftables so that that there is no problem when cross-compiling. |
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Release 7.0 19-Dec-06 |
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--------------------- |
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This release has a new major number because there have been some internal |
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upheavals to facilitate the addition of new optimizations and other facilities, |
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and to make subsequent maintenance and extension easier. Compilation is likely |
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to be a bit slower, but there should be no major effect on runtime performance. |
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Previously compiled patterns are NOT upwards compatible with this release. If |
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you have saved compiled patterns from a previous release, you will have to |
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re-compile them. Important changes that are visible to users are: |
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1. The Unicode property tables have been updated to Unicode 5.0.0, which adds |
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some more scripts. |
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2. The option PCRE_NEWLINE_ANY causes PCRE to recognize any Unicode newline |
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sequence as a newline. |
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3. The \R escape matches a single Unicode newline sequence as a single unit. |
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4. New features that will appear in Perl 5.10 are now in PCRE. These include |
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alternative Perl syntax for named parentheses, and Perl syntax for |
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recursion. |
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5. The C++ wrapper interface has been extended by the addition of a |
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QuoteMeta function and the ability to allow copy construction and |
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assignment. |
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For a complete list of changes, see the ChangeLog file. |
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Release 6.7 04-Jul-06 |
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--------------------- |
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The main additions to this release are the ability to use the same name for |
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multiple sets of parentheses, and support for CRLF line endings in both the |
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library and pcregrep (and in pcretest for testing). |
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Thanks to Ian Taylor, the stack usage for many kinds of pattern has been |
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significantly reduced for certain subject strings. |
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Release 6.5 01-Feb-06 |
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--------------------- |
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Important changes in this release: |
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1. A number of new features have been added to pcregrep. |
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2. The Unicode property tables have been updated to Unicode 4.1.0, and the |
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supported properties have been extended with script names such as "Arabic", |
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and the derived properties "Any" and "L&". This has necessitated a change to |
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the interal format of compiled patterns. Any saved compiled patterns that |
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use \p or \P must be recompiled. |
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3. The specification of recursion in patterns has been changed so that all |
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recursive subpatterns are automatically treated as atomic groups. Thus, for |
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example, (?R) is treated as if it were (?>(?R)). This is necessary because |
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otherwise there are situations where recursion does not work. |
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See the ChangeLog for a complete list of changes, which include a number of bug |
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fixes and tidies. |
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Release 6.0 07-Jun-05 |
Release 6.0 07-Jun-05 |
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--------------------- |
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