--- embedaddon/pcre/ChangeLog 2013/07/22 08:25:55 1.1.1.4
+++ embedaddon/pcre/ChangeLog 2014/06/15 19:46:04 1.1.1.5
@@ -1,8 +1,216 @@
ChangeLog for PCRE
------------------
+Version 8.34 15-December-2013
+-----------------------------
+
+1. Add pcre[16|32]_jit_free_unused_memory to forcibly free unused JIT
+ executable memory. Patch inspired by Carsten Klein.
+
+2. ./configure --enable-coverage defined SUPPORT_GCOV in config.h, although
+ this macro is never tested and has no effect, because the work to support
+ coverage involves only compiling and linking options and special targets in
+ the Makefile. The comment in config.h implied that defining the macro would
+ enable coverage support, which is totally false. There was also support for
+ setting this macro in the CMake files (my fault, I just copied it from
+ configure). SUPPORT_GCOV has now been removed.
+
+3. Make a small performance improvement in strlen16() and strlen32() in
+ pcretest.
+
+4. Change 36 for 8.33 left some unreachable statements in pcre_exec.c,
+ detected by the Solaris compiler (gcc doesn't seem to be able to diagnose
+ these cases). There was also one in pcretest.c.
+
+5. Cleaned up a "may be uninitialized" compiler warning in pcre_exec.c.
+
+6. In UTF mode, the code for checking whether a group could match an empty
+ string (which is used for indefinitely repeated groups to allow for
+ breaking an infinite loop) was broken when the group contained a repeated
+ negated single-character class with a character that occupied more than one
+ data item and had a minimum repetition of zero (for example, [^\x{100}]* in
+ UTF-8 mode). The effect was undefined: the group might or might not be
+ deemed as matching an empty string, or the program might have crashed.
+
+7. The code for checking whether a group could match an empty string was not
+ recognizing that \h, \H, \v, \V, and \R must match a character.
+
+8. 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.
+
+9. Fixed two related bugs that applied to Unicode extended grapheme clusters
+ that were repeated with a maximizing qualifier (e.g. \X* or \X{2,5}) when
+ matched by pcre_exec() without using JIT:
+
+ (a) If the rest of the pattern did not match after a maximal run of
+ grapheme clusters, the code for backing up to try with fewer of them
+ did not always back up over a full grapheme when characters that do not
+ have the modifier quality were involved, e.g. Hangul syllables.
+
+ (b) If the match point in a subject started with modifier character, and
+ there was no match, the code could incorrectly back up beyond the match
+ point, and potentially beyond the first character in the subject,
+ leading to a segfault or an incorrect match result.
+
+10. A conditional group with an assertion condition could lead to PCRE
+ recording an incorrect first data item for a match if no other first data
+ item was recorded. For example, the pattern (?(?=ab)ab) recorded "a" as a
+ first data item, and therefore matched "ca" after "c" instead of at the
+ start.
+
+11. Change 40 for 8.33 (allowing pcregrep to find empty strings) showed up a
+ bug that caused the command "echo a | ./pcregrep -M '|a'" to loop.
+
+12. The source of pcregrep now includes z/OS-specific code so that it can be
+ compiled for z/OS as part of the special z/OS distribution.
+
+13. Added the -T and -TM options to pcretest.
+
+14. The code in pcre_compile.c for creating the table of named capturing groups
+ has been refactored. Instead of creating the table dynamically during the
+ actual compiling pass, the information is remembered during the pre-compile
+ pass (on the stack unless there are more than 20 named groups, in which
+ case malloc() is used) and the whole table is created before the actual
+ compile happens. This has simplified the code (it is now nearly 150 lines
+ shorter) and prepared the way for better handling of references to groups
+ with duplicate names.
+
+15. 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.
+
+16. Unicode character properties were updated from Unicode 6.3.0.
+
+17. The compile-time code for auto-possessification has been refactored, based
+ on a patch by Zoltan Herczeg. It now happens after instead of during
+ compilation. The code is cleaner, and more cases are handled. The option
+ PCRE_NO_AUTO_POSSESS is added for testing purposes, and the -O and /O
+ options in pcretest are provided to set it. It can also be set by
+ (*NO_AUTO_POSSESS) at the start of a pattern.
+
+18. The character VT has been added to the default ("C" locale) 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". Whether VT is treated as white space in
+ other locales depends on the locale.
+
+19. The code for checking named groups as conditions, either for being set or
+ for being recursed, has been refactored (this is related to 14 and 15
+ above). Processing unduplicated named groups should now be as fast at
+ numerical groups, and processing duplicated groups should be faster than
+ before.
+
+20. Two patches to the CMake build system, by Alexander Barkov:
+
+ (1) Replace the "source" command by "." in CMakeLists.txt because
+ "source" is a bash-ism.
+
+ (2) Add missing HAVE_STDINT_H and HAVE_INTTYPES_H to config-cmake.h.in;
+ without these the CMake build does not work on Solaris.
+
+21. 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.
+
+22. Following Perl, added \o{} to specify codepoints in octal, making it
+ possible to specify values greater than 0777 and also making them
+ unambiguous.
+
+23. Perl now gives an error for missing closing braces after \x{... instead of
+ treating the string as literal. PCRE now does the same.
+
+24. RunTest used to grumble if an inappropriate test was selected explicitly,
+ but just skip it when running all tests. This make it awkward to run ranges
+ of tests when one of them was inappropriate. Now it just skips any
+ inappropriate tests, as it always did when running all tests.
+
+25. If PCRE_AUTO_CALLOUT and PCRE_UCP were set for a pattern that contained
+ character types such as \d or \w, too many callouts were inserted, and the
+ data that they returned was rubbish.
+
+26. 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. The code has now been refactored so that the lists of
+ the horizontal and vertical whitespace characters used for \h and \v (which
+ are defined only in one place) are now also used for \s.
+
+27. Add JIT support for the 64 bit TileGX architecture.
+ Patch by Jiong Wang (Tilera Corporation).
+
+28. Possessive quantifiers for classes (both explicit and automatically
+ generated) now use special opcodes instead of wrapping in ONCE brackets.
+
+29. Whereas an item such as A{4}+ ignored the possessivenes of the quantifier
+ (because it's meaningless), this was not happening when PCRE_CASELESS was
+ set. Not wrong, but inefficient.
+
+30. Updated perltest.pl to add /u (force Unicode mode) when /W (use Unicode
+ properties for \w, \d, etc) is present in a test regex. Otherwise if the
+ test contains no characters greater than 255, Perl doesn't realise it
+ should be using Unicode semantics.
+
+31. 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.
+
+32. Added the "forbid" facility to pcretest so that putting tests into the
+ wrong test files can sometimes be quickly detected.
+
+33. There is now a limit (default 250) on the depth of nesting of parentheses.
+ This limit is imposed to control the amount of system stack used at compile
+ time. It can be changed at build time by --with-parens-nest-limit=xxx or
+ the equivalent in CMake.
+
+34. Character classes such as [A-\d] or [a-[:digit:]] now cause compile-time
+ errors. Perl warns for these when in warning mode, but PCRE has no facility
+ for giving warnings.
+
+35. Change 34 for 8.13 allowed quantifiers on assertions, because Perl does.
+ However, this was not working for (?!) because it is optimized to (*FAIL),
+ for which PCRE does not allow quantifiers. The optimization is now disabled
+ when a quantifier follows (?!). I can't see any use for this, but it makes
+ things uniform.
+
+36. Perl no longer allows group names to start with digits, so I have made this
+ change also in PCRE. It simplifies the code a bit.
+
+37. In extended mode, Perl ignores spaces before a + that indicates a
+ possessive quantifier. PCRE allowed a space before the quantifier, but not
+ before the possessive +. It now does.
+
+38. The use of \K (reset reported match start) within a repeated possessive
+ group such as (a\Kb)*+ was not working.
+
+40. Document that the same character tables must be used at compile time and
+ run time, and that the facility to pass tables to pcre_exec() and
+ pcre_dfa_exec() is for use only with saved/restored patterns.
+
+41. Applied Jeff Trawick's patch CMakeLists.txt, which "provides two new
+ features for Builds with MSVC:
+
+ 1. Support pcre.rc and/or pcreposix.rc (as is already done for MinGW
+ builds). The .rc files can be used to set FileDescription and many other
+ attributes.
+
+ 2. Add an option (-DINSTALL_MSVC_PDB) to enable installation of .pdb files.
+ This allows higher-level build scripts which want .pdb files to avoid
+ hard-coding the exact files needed."
+
+42. 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.
+
+43. A minimizing repeat of a class containing codepoints greater than 255 in
+ non-UTF 16-bit or 32-bit modes caused an internal error when PCRE was
+ compiled to use the heap for recursion.
+
+44. Got rid of some compiler warnings for unused variables when UTF but not UCP
+ is configured.
+
+
Version 8.33 28-May-2013
---------------------------
+------------------------
1. Added 'U' to some constants that are compared to unsigned integers, to
avoid compiler signed/unsigned warnings. Added (int) casts to unsigned