חדשות, עדכונים, מדריכים ועזרים | עדכוני תוכנות ואפליקציות - (30.11.12) - גרסה חדשה: PCRE 8.32 released

(30.11.12) - גרסה חדשה: PCRE 8.32 released

עדכוני תוכנות ואפליקציות

חדשות, עדכונים, מדריכים ועזרים


http://pcre.org/changelog.txt
http://pcre.org/news.txt

מה חדש:
Version 8.32 30-November-2012
-----------------------------
1.  Improved JIT compiler optimizations for first character search and single
    character iterators.

2.  Supporting IBM XL C compilers for PPC architectures in the JIT compiler.
    Patch by Daniel Richard G.

3.  Single character iterator optimizations in the JIT compiler.

4.  Improved JIT compiler optimizations for character ranges.

5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
    Reported by Giuseppe D'Angelo.

6.  The PCRE_STARTLINE bit, indicating that a match can occur only at the start
    of a line, was being set incorrectly in cases where .* appeared inside
    atomic brackets at the start of a pattern, or where there was a subsequent
    *PRUNE or *SKIP.

7.  Improved instruction cache flush for POWER/PowerPC.
    Patch by Daniel Richard G.

8.  Fixed a number of issues in pcregrep, making it more compatible with GNU
    grep:

    (a) There is now no limit to the number of patterns to be matched.

    (b) An error is given if a pattern is too long.

    (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
        are now supported.

    (d) --exclude-from and --include-from (multiple use) have been added.

    (e) Exclusions and inclusions now apply to all files and directories, not
        just to those obtained from scanning a directory recursively.

    (f) Multiple uses of -f and --file-list are now supported.

    (g) In a Windows environment, the default for -d has been changed from
        "read" (the GNU grep default) to "skip", because otherwise the presence
        of a directory in the file list provokes an error.

    (h) The documentation has been revised and clarified in places.

9.  Improve the matching speed of capturing brackets.

10. Changed the meaning of \X so that it now matches a Unicode extended
    grapheme cluster.

11. Patch by Daniel Richard G to the autoconf files to add a macro for sorting
    out POSIX threads when JIT support is configured.

12. Added support for PCRE_STUDY_EXTRA_NEEDED.

13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg
    structure could go wrong in environments where size_t is not the same size
    as int.

14. Applied user-supplied patch to pcrecpp.cc to allow PCRE_NO_UTF8_CHECK to be
    set.

15. The EBCDIC support had decayed; later updates to the code had included
    explicit references to (e.g.) \x0a instead of CHAR_LF. There has been a
    general tidy up of EBCDIC-related issues, and the documentation was also
    not quite right. There is now a test that can be run on ASCII systems to
    check some of the EBCDIC-related things (but is it not a full test).

16. The new PCRE_STUDY_EXTRA_NEEDED option is now used by pcregrep, resulting
    in a small tidy to the code.

17. Fix JIT tests when UTF is disabled and both 8 and 16 bit mode are enabled.

18. 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).

19. Improving the first n character searches.

20. Turn case lists for horizontal and vertical white space into macros so that
    they are defined only once.

21. This set of changes together give more compatible Unicode case-folding
    behaviour for characters that have more than one other case when UCP
    support is available.

    (a) The Unicode property table now has offsets into a new table of sets of
        three or more characters that are case-equivalent. The MultiStage2.py
        script that generates these tables (the pcre_ucd.c file) now scans
        CaseFolding.txt instead of UnicodeData.txt for character case
        information.

    (b) The code for adding characters or ranges of characters to a character
        class has been abstracted into a generalized function that also handles
        case-independence. In UTF-mode with UCP support, this uses the new data
        to handle characters with more than one other case.

    (c) A bug that is fixed as a result of (b) is that codepoints less than 256
        whose other case is greater than 256 are now correctly matched
        caselessly. Previously, the high codepoint matched the low one, but not
        vice versa.

    (d) The processing of \h, \H, \v, and \ in character classes now makes use
        of the new class addition function, using character lists defined as
        macros alongside the case definitions of 20 above.

    (e) Caseless back references now work with characters that have more than
        one other case.

    (f) General caseless matching of characters with more than one other case
        is supported.

22. Unicode character properties were updated from Unicode 6.2.0

23. Improved CMake support under Windows. Patch by Daniel Richard G.

24. Add support for 32-bit character strings, and UTF-32

25. Major JIT compiler update (code refactoring and bugfixing).
    Experimental Sparc 32 support is added.

26. Applied a modified version of Daniel Richard G's patch to create
    pcre.h.generic and config.h.generic by "make" instead of in the
    PrepareRelease script.

27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in
    pcre_compile.c when checking for a zero character.

28. Introducing a native interface for JIT. Through this interface, the compiled
    machine code can be directly executed. The purpose of this interface is to
    provide fast pattern matching, so several sanity checks are not performed.
    However, feature tests are still performed. The new interface provides
    1.4x speedup compared to the old one.

29. If pcre_exec() or pcre_dfa_exec() was called with a negative value for
    the subject string length, the error given was PCRE_ERROR_BADOFFSET, which
    was confusing. There is now a new error PCRE_ERROR_BADLENGTH for this case.

30. In 8-bit UTF-8 mode, pcretest failed to give an error for data codepoints
    greater than 0x7fffffff (which cannot be represented in UTF-8, even under
    the "old" RFC 2279). Instead, it ended up passing a negative length to
    pcre_exec().

31. Add support for GCC's visibility feature to hide internal functions.

32. Running "pcretest -C pcre8" or "pcretest -C pcre16" gave a spurious error
    "unknown -C option" after outputting 0 or 1.

33. There is now support for generating a code coverage report for the test
    suite in environments where gcc is the compiler and lcov is installed. This
    is mainly for the benefit of the developers.

34. If PCRE is built with --enable-valgrind, certain memory regions are marked
    unaddressable using valgrind annotations, allowing valgrind to detect
    invalid memory accesses. This is mainly for the benefit of the developers.

25. (*UTF) can now be used to start a pattern in any of the three libraries.

26. Give configure error if --enable-cpp but no C++ compiler found.