/[pcre]/code/trunk/ChangeLog

Diff of /code/trunk/ChangeLog

Parent Directory | Revision Log | View Patch Patch

-revision 760 by ph10,
Tue Nov 22 11:23:43 2011 UTC
+revision 970 by zherczeg,
Sun May 27 05:28:19 2012 UTC
 Line 1
  ChangeLog for PCRE
  ------------------
- Version 8.21
+ Version 8.31
- ------------
+ -----------------------------
+.  Fixing a wrong JIT test case and some compiler warnings.
+.  Removed a bashism from the RunTest script.
+.  Add a cast to pcre_exec.c to fix the warning "unary minus operator applied
+     to unsigned type, result still unsigned" that was given by an MS compiler
+     on encountering the code "-sizeof(xxx)".
+.  Partial matching support is added to the JIT compiler.
+.  Fixed several bugs concerned with partial matching of items that consist
+     of more than one character:
+     (a) /^(..)\1/ did not partially match "aba" because checking references was
+         done on an "all or nothing" basis. This also applied to repeated
+         references.
+     (b) \R did not give a hard partial match if \r was found at the end of the
+         subject.
+     (c) \X did not give a hard partial match after matching one or more
+         characters at the end of the subject.
+     (d) When newline was set to CRLF, a pattern such as /a$/ did not recognize
+         a partial match for the string "\r".
+     (e) When newline was set to CRLF, the metacharacter "." did not recognize
+         a partial match for a CR character at the end of the subject string.
+.  If JIT is requested using /S++ or -s++ (instead of just /S+ or -s+) when
+     running pcretest, the text "(JIT)" added to the output whenever JIT is
+     actually used to run the match.
+.  Individual JIT compile options can be set in pcretest by following -s+[+]
+     or /S+[+] with a digit between 1 and 7.
+.  OP_NOT now supports any UTF character not just single-byte ones.
+.  (*MARK) control verb is now supported by the JIT compiler.
+. The command "./RunTest list" lists the available tests without actually
+     running any of them. (Because I keep forgetting what they all are.)
+. Add PCRE_INFO_MAXLOOKBEHIND.
+. Applied a (slightly modified) user-supplied patch that improves performance
+     when the heap is used for recursion (compiled with --disable-stack-for-
+     recursion). Instead of malloc and free for each heap frame each time a
+     logical recursion happens, frames are retained on a chain and re-used where
+     possible. This sometimes gives as much as 30% improvement.
+. As documented, (*COMMIT) is now confined to within a recursive subpattern
+     call.
+. As documented, (*COMMIT) is now confined to within a positive assertion.
+. It is now possible to link pcretest with libedit as an alternative to
+     libreadline.
+. (*COMMIT) control verb is now supported by the JIT compiler.
+. The Unicode data tables have been updated to Unicode 6.1.0.
+. Added --file-list option to pcregrep.
+. Added binary file support to pcregrep, including the -a, --binary-files,
+     -I, and --text options.
+. The madvise function is renamed for posix_madvise for QNX compatibility
+     reasons. Fixed by Giuseppe D'Angelo.
+. Fixed a bug for backward assertions with REVERSE 0 in the JIT compiler.
+. Changed the option for creating symbolic links for 16-bit man pages from
+     -s to -sf so that re-installing does not cause issues.
+. Support PCRE_NO_START_OPTIMIZE in JIT as (*MARK) support requires it.
+. Fixed a very old bug in pcretest that caused errors with restarted DFA
+     matches in certain environments (the workspace was not being correctly
+     retained). Also added to pcre_dfa_exec() a simple plausibility check on
+     some of the workspace data at the beginning of a restart.
+. \s*\R was auto-possessifying the \s* when it should not, whereas \S*\R
+     was not doing so when it should - probably a typo introduced by SVN 528
+     (change 8.10/14).
+. When PCRE_UCP was not set, \w+\x{c4} was incorrectly auto-possessifying the
+     \w+ when the character tables indicated that \x{c4} was a word character.
+     There were several related cases, all because the tests for doing a table
+     lookup were testing for characters less than 127 instead of 255.
+. If a pattern contains capturing parentheses that are not used in a match,
+     their slots in the ovector are set to -1. For those that are higher than
+     any matched groups, this happens at the end of processing. In the case when
+     there were back references that the ovector was too small to contain
+     (causing temporary malloc'd memory to be used during matching), and the
+     highest capturing number was not used, memory off the end of the ovector
+     was incorrectly being set to -1. (It was using the size of the temporary
+     memory instead of the true size.)
+. To catch bugs like 27 using valgrind, when pcretest is asked to specify an
+     ovector size, it uses memory at the end of the block that it has got.
+. Check for an overlong MARK name and give an error at compile time. The
+     limit is 255 for the 8-bit library and 65535 for the 16-bit library.
+. JIT compiler update.
+. JIT is now supported on jailbroken iOS devices. Thanks for Ruiger
+     Rill for the patch.
+. Put spaces around SLJIT_PRINT_D in the JIT compiler. Required by CXX11.
+. Variable renamings in the PCRE-JIT compiler. No functionality change.
+ Version 8.30 04-February-2012
+ -----------------------------
+.  Renamed "isnumber" as "is_a_number" because in some Mac environments this
+     name is defined in ctype.h.
+.  Fixed a bug in fixed-length calculation for lookbehinds that would show up
+     only in quite long subpatterns.
+.  Removed the function pcre_info(), which has been obsolete and deprecated
+     since it was replaced by pcre_fullinfo() in February 2000.
+.  For a non-anchored pattern, if (*SKIP) was given with a name that did not
+     match a (*MARK), and the match failed at the start of the subject, a
+     reference to memory before the start of the subject could occur. This bug
+     was introduced by fix 17 of release 8.21.
+.  A reference to an unset group with zero minimum repetition was giving
+     totally wrong answers (in non-JavaScript-compatibility mode). For example,
+     /(another)?(\1?)test/ matched against "hello world test". This bug was
+     introduced in release 8.13.
+.  Add support for 16-bit character strings (a large amount of work involving
+     many changes and refactorings).
+.  RunGrepTest failed on msys because \r\n was replaced by whitespace when the
+     command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken
+     from a file.
+.  Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size
+     rounding is not applied in this particular case).
+.  The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected
+     if they appear, or are escaped, in patterns.
+. Get rid of a number of -Wunused-but-set-variable warnings.
+. The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark
+     "x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all.
+     Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern
+     also returns the mark "x". This bug applied to capturing parentheses,
+     non-capturing parentheses, and atomic parentheses. It also applied to some
+     assertions.
+. Stephen Kelly's patch to CMakeLists.txt allows it to parse the version
+     information out of configure.ac instead of relying on pcre.h.generic, which
+     is not stored in the repository.
+. Applied Dmitry V. Levin's patch for a more portable method for linking with
+     -lreadline.
+. ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C.
+. Applied Graycode's patch to put the top-level frame on the stack rather
+     than the heap when not using the stack for recursion. This gives a
+     performance improvement in many cases when recursion is not deep.
+. Experimental code added to "pcretest -C" to output the stack frame size.
+ Version 8.21 12-Dec-2011
+ ------------------------
 .  Updating the JIT compiler.
-Line 13 
 Version 8.21
+Line 193 
 Version 8.21
      PCRE_EXTRA_TABLES is not suported by JIT, and should be checked before
      calling _pcre_jit_exec. Some extra comments are added.
-.  Mark settings inside atomic groups that do not contain any capturing
+.  (*MARK) settings inside atomic groups that do not contain any capturing
      parentheses, for example, (?>a(*:m)), were not being passed out. This bug
      was introduced by change 18 for 8.20.
-Line 22 
 Version 8.21
+Line 202 
 Version 8.21
 .  Lookbehinds such as (?<=a{2}b) that contained a fixed repetition were
      erroneously being rejected as "not fixed length" if PCRE_CASELESS was set.
      This bug was probably introduced by change 9 of 8.13.
 .  While fixing 6 above, I noticed that a number of other items were being
      incorrectly rejected as "not fixed length". This arose partly because newer
      opcodes had not been added to the fixed-length checking code. I have (a)
      corrected the bug and added tests for these items, and (b) arranged for an
      error to occur if an unknown opcode is encountered while checking for fixed
      length instead of just assuming "not fixed length". The items that were
      rejected were: (*ACCEPT), (*COMMIT), (*FAIL), (*MARK), (*PRUNE), (*SKIP),
      (*THEN), \h, \H, \v, \V, and single character negative classes with fixed
      repetitions, e.g. [^a]{3}, with and without PCRE_CASELESS.
 .  A possessively repeated conditional subpattern such as (?(?=c)c|d)++ was
      being incorrectly compiled and would have given unpredicatble results.
 .  A possessively repeated subpattern with minimum repeat count greater than
      one behaved incorrectly. For example, (A){2,}+ behaved as if it was
      (A)(A)++ which meant that, after a subsequent mismatch, backtracking into
      the first (A) could occur when it should not.
 . Add a cast and remove a redundant test from the code.
 . JIT should use pcre_malloc/pcre_free for allocation.
 . Updated pcre-config so that it no longer shows -L/usr/lib, which seems
      best practice nowadays, and helps with cross-compiling. (If the exec_prefix
      is anything other than /usr, -L is still shown).
 . In non-UTF-8 mode, \C is now supported in lookbehinds and DFA matching.
 . Perl does not support \N without a following name in a [] class; PCRE now
      also gives an error.
 . If a forward reference was repeated with an upper limit of around 2000,
-     it caused the error "internal error: overran compiling workspace". This
+     it caused the error "internal error: overran compiling workspace". The
-     is now checked, and causes "too many forward references" instead.
+     maximum number of forward references (including repeats) was limited by the
+     internal workspace, and dependent on the LINK_SIZE. The code has been
+     rewritten so that the workspace expands (via pcre_malloc) if necessary, and
+     the default depends on LINK_SIZE. There is a new upper limit (for safety)
+     of around 200,000 forward references. While doing this, I also speeded up
+     the filling in of repeated forward references.
+. A repeated forward reference in a pattern such as (a)(?2){2}(.) was
+     incorrectly expecting the subject to contain another "a" after the start.
+. When (*SKIP:name) is activated without a corresponding (*MARK:name) earlier
+     in the match, the SKIP should be ignored. This was not happening; instead
+     the SKIP was being treated as NOMATCH. For patterns such as
+     /A(*MARK:A)A+(*SKIP:B)Z|AAC/ this meant that the AAC branch was never
+     tested.
+. The behaviour of (*MARK), (*PRUNE), and (*THEN) has been reworked and is
+     now much more compatible with Perl, in particular in cases where the result
+     is a non-match for a non-anchored pattern. For example, if
+     /b(*:m)f|a(*:n)w/ is matched against "abc", the non-match returns the name
+     "m", where previously it did not return a name. A side effect of this
+     change is that for partial matches, the last encountered mark name is
+     returned, as for non matches. A number of tests that were previously not
+     Perl-compatible have been moved into the Perl-compatible test files. The
+     refactoring has had the pleasing side effect of removing one argument from
+     the match() function, thus reducing its stack requirements.
+. If the /S+ option was used in pcretest to study a pattern using JIT,
+     subsequent uses of /S (without +) incorrectly behaved like /S+.
+. Retrieve executable code size support for the JIT compiler and fixing
+     some warnings.
+. A caseless match of a UTF-8 character whose other case uses fewer bytes did
+     not work when the shorter character appeared right at the end of the
+     subject string.
+. Added some (int) casts to non-JIT modules to reduce warnings on 64-bit
+     systems.
+. Added PCRE_INFO_JITSIZE to pass on the value from (21) above, and also
+     output it when the /M option is used in pcretest.
+. The CheckMan script was not being included in the distribution. Also, added
+     an explicit "perl" to run Perl scripts from the PrepareRelease script
+     because this is reportedly needed in Windows.
+. If study data was being save in a file and studying had not found a set of
+     "starts with" bytes for the pattern, the data written to the file (though
+     never used) was taken from uninitialized memory and so caused valgrind to
+     complain.
+. Updated RunTest.bat as provided by Sheri Pierce.
+. Fixed a possible uninitialized memory bug in pcre_jit_compile.c.
+. Computation of memory usage for the table of capturing group names was
+     giving an unnecessarily large value.
  Version 8.20 21-Oct-2011

 Legend:



Removed from v.760
 


changed lines


 
Added in v.970
 Legend:



Removed from v.760
 


changed lines


 
Added in v.970
-Removed from v.760
+Added in v.970

webmaster@exim.org	ViewVC Help
Powered by ViewVC 1.1.12