147 lines
5.3 KiB
Plaintext
147 lines
5.3 KiB
Plaintext
News about PCRE2 releases
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-------------------------
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Version 10.23 16-January-2017
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-----------------------------
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1. ChangeLog has the details of a lot of bug fixes and tidies.
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2. There has been a major re-factoring of the pcre2_compile.c file. Most syntax
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checking is now done in the pre-pass that identifies capturing groups. This has
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reduced the amount of duplication and made the code tidier. While doing this,
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some minor bugs and Perl incompatibilities were fixed (see ChangeLog for
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details.)
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3. Back references are now permitted in lookbehind assertions when there are
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no duplicated group numbers (that is, (?| has not been used), and, if the
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reference is by name, there is only one group of that name. The referenced
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group must, of course be of fixed length.
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4. \g{+<number>} (e.g. \g{+2} ) is now supported. It is a "forward back
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reference" and can be useful in repetitions (compare \g{-<number>} ). Perl does
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not recognize this syntax.
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5. pcre2grep now automatically expands its buffer up to a maximum set by
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--max-buffer-size.
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6. The -t option (grand total) has been added to pcre2grep.
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7. A new function called pcre2_code_copy_with_tables() exists to copy a
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compiled pattern along with a private copy of the character tables that is
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uses.
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8. A user supplied a number of patches to upgrade pcre2grep under Windows and
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tidy the code.
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9. Several updates have been made to pcre2test and test scripts (see
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ChangeLog).
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Version 10.22 29-July-2016
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--------------------------
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1. ChangeLog has the details of a number of bug fixes.
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2. The POSIX wrapper function regcomp() did not used to support back references
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and subroutine calls if called with the REG_NOSUB option. It now does.
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3. A new function, pcre2_code_copy(), is added, to make a copy of a compiled
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pattern.
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4. Support for string callouts is added to pcre2grep.
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5. Added the PCRE2_NO_JIT option to pcre2_match().
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6. The pcre2_get_error_message() function now returns with a negative error
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code if the error number it is given is unknown.
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7. Several updates have been made to pcre2test and test scripts (see
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ChangeLog).
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Version 10.21 12-January-2016
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-----------------------------
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1. Many bugs have been fixed. A large number of them were provoked only by very
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strange pattern input, and were discovered by fuzzers. Some others were
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discovered by code auditing. See ChangeLog for details.
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2. The Unicode tables have been updated to Unicode version 8.0.0.
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3. For Perl compatibility in EBCDIC environments, ranges such as a-z in a
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class, where both values are literal letters in the same case, omit the
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non-letter EBCDIC code points within the range.
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4. There have been a number of enhancements to the pcre2_substitute() function,
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giving more flexibility to replacement facilities. It is now also possible to
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cause the function to return the needed buffer size if the one given is too
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small.
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5. The PCRE2_ALT_VERBNAMES option causes the "name" parts of special verbs such
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as (*THEN:name) to be processed for backslashes and to take note of
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PCRE2_EXTENDED.
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6. PCRE2_INFO_HASBACKSLASHC makes it possible for a client to find out if a
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pattern uses \C, and --never-backslash-C makes it possible to compile a version
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PCRE2 in which the use of \C is always forbidden.
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7. A limit to the length of pattern that can be handled can now be set by
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calling pcre2_set_max_pattern_length().
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8. When matching an unanchored pattern, a match can be required to begin within
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a given number of code units after the start of the subject by calling
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pcre2_set_offset_limit().
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9. The pcre2test program has been extended to test new facilities, and it can
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now run the tests when LF on its own is not a valid newline sequence.
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10. The RunTest script has also been updated to enable more tests to be run.
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11. There have been some minor performance enhancements.
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Version 10.20 30-June-2015
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--------------------------
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1. Callouts with string arguments and the pcre2_callout_enumerate() function
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have been implemented.
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2. The PCRE2_NEVER_BACKSLASH_C option, which locks out the use of \C, is added.
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3. The PCRE2_ALT_CIRCUMFLEX option lets ^ match after a newline at the end of a
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subject in multiline mode.
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4. The way named subpatterns are handled has been refactored. The previous
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approach had several bugs.
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5. The handling of \c in EBCDIC environments has been changed to conform to the
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perlebcdic document. This is an incompatible change.
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6. Bugs have been mended, many of them discovered by fuzzers.
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Version 10.10 06-March-2015
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---------------------------
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1. Serialization and de-serialization functions have been added to the API,
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making it possible to save and restore sets of compiled patterns, though
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restoration must be done in the same environment that was used for compilation.
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2. The (*NO_JIT) feature has been added; this makes it possible for a pattern
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creator to specify that JIT is not to be used.
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3. A number of bugs have been fixed. In particular, bugs that caused building
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on Windows using CMake to fail have been mended.
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Version 10.00 05-January-2015
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-----------------------------
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Version 10.00 is the first release of PCRE2, a revised API for the PCRE
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library. Changes prior to 10.00 are logged in the ChangeLog file for the old
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API, up to item 20 for release 8.36. New programs are recommended to use the
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new library. Programs that use the original (PCRE1) API will need changing
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before linking with the new library.
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****
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