/[pcre]/code/trunk/ChangeLog

Diff of /code/trunk/ChangeLog

Parent Directory | Revision Log | View Patch Patch

-revision 521 by ph10,
Sat May 22 19:03:35 2010 UTC
+revision 699 by ph10,
Tue Sep 20 10:46:54 2011 UTC
 Line 1
  ChangeLog for PCRE
  ------------------
- Version 8.10 03 May-2010
+ Version 8.20 12-Sep-2011
+ ------------------------
+. Change 37 of 8.13 broke patterns like [:a]...[b:] because it thought it had
+    a POSIX class. After further experiments with Perl, which convinced me that
+    Perl has bugs and confusions, a closing square bracket is no longer allowed
+    in a POSIX name. This bug also affected patterns with classes that started
+    with full stops.
+. If a pattern such as /(a)b|ac/ is matched against "ac", there is no captured
+    substring, but while checking the failing first alternative, substring 1 is
+    temporarily captured. If the output vector supplied to pcre_exec() was not
+    big enough for this capture, the yield of the function was still zero
+    ("insufficient space for captured substrings"). This cannot be totally fixed
+    without adding another stack variable, which seems a lot of expense for a
+    edge case. However, I have improved the situation in cases such as
+    /(a)(b)x|abc/ matched against "abc", where the return code indicates that
+    fewer than the maximum number of slots in the ovector have been set.
+. Related to (2) above: when there are more back references in a pattern than
+    slots in the output vector, pcre_exec() uses temporary memory during
+    matching, and copies in the captures as far as possible afterwards. It was
+    using the entire output vector, but this conflicts with the specification
+    that only 2/3 is used for passing back captured substrings. Now it uses only
+    the first 2/3, for compatibility. This is, of course, another edge case.
+. Zoltan Herczeg's just-in-time compiler support has been integrated into the
+    main code base, and can be used by building with --enable-jit. When this is
+    done, pcregrep automatically uses it unless --disable-pcregrep-jit or the
+    runtime --no-jit option is given.
+. When the number of matches in a pcre_dfa_exec() run exactly filled the
+    ovector, the return from the function was zero, implying that there were
+    other matches that did not fit. The correct "exactly full" value is now
+    returned.
+. If a subpattern that was called recursively or as a subroutine contained
+    (*PRUNE) or any other control that caused it to give a non-standard return,
+    invalid errors such as "Error -26 (nested recursion at the same subject
+    position)" or even infinite loops could occur.
+. If a pattern such as /a(*SKIP)c|b(*ACCEPT)|/ was studied, it stopped
+    computing the minimum length on reaching *ACCEPT, and so ended up with the
+    wrong value of 1 rather than 0. Further investigation indicates that
+    computing a minimum subject length in the presence of *ACCEPT is difficult
+    (think back references, subroutine calls), and so I have changed the code so
+    that no minimum is registered for a pattern that contains *ACCEPT.
+. If (*THEN) was present in the first (true) branch of a conditional group,
+    it was not handled as intended.
+ Version 8.13 16-Aug-2011
+ ------------------------
+.  The Unicode data tables have been updated to Unicode 6.0.0.
+.  Two minor typos in pcre_internal.h have been fixed.
+.  Added #include <string.h> to pcre_scanner_unittest.cc, pcrecpp.cc, and
+     pcrecpp_unittest.cc. They are needed for strcmp(), memset(), and strchr()
+     in some environments (e.g. Solaris 10/SPARC using Sun Studio 12U2).
+.  There were a number of related bugs in the code for matching backrefences
+     caselessly in UTF-8 mode when codes for the characters concerned were
+     different numbers of bytes. For example, U+023A and U+2C65 are an upper
+     and lower case pair, using 2 and 3 bytes, respectively. The main bugs were:
+     (a) A reference to 3 copies of a 2-byte code matched only 2 of a 3-byte
+     code. (b) A reference to 2 copies of a 3-byte code would not match 2 of a
+-byte code at the end of the subject (it thought there wasn't enough data
+     left).
+.  Comprehensive information about what went wrong is now returned by
+     pcre_exec() and pcre_dfa_exec() when the UTF-8 string check fails, as long
+     as the output vector has at least 2 elements. The offset of the start of
+     the failing character and a reason code are placed in the vector.
+.  When the UTF-8 string check fails for pcre_compile(), the offset that is
+     now returned is for the first byte of the failing character, instead of the
+     last byte inspected. This is an incompatible change, but I hope it is small
+     enough not to be a problem. It makes the returned offset consistent with
+     pcre_exec() and pcre_dfa_exec().
+.  pcretest now gives a text phrase as well as the error number when
+     pcre_exec() or pcre_dfa_exec() fails; if the error is a UTF-8 check
+     failure, the offset and reason code are output.
+.  When \R was used with a maximizing quantifier it failed to skip backwards
+     over a \r\n pair if the subsequent match failed. Instead, it just skipped
+     back over a single character (\n). This seems wrong (because it treated the
+     two characters as a single entity when going forwards), conflicts with the
+     documentation that \R is equivalent to (?>\r\n|\n|...etc), and makes the
+     behaviour of \R* different to (\R)*, which also seems wrong. The behaviour
+     has been changed.
+.  Some internal refactoring has changed the processing so that the handling
+     of the PCRE_CASELESS and PCRE_MULTILINE options is done entirely at compile
+     time (the PCRE_DOTALL option was changed this way some time ago: version
+.7 change 16). This has made it possible to abolish the OP_OPT op code,
+     which was always a bit of a fudge. It also means that there is one less
+     argument for the match() function, which reduces its stack requirements
+     slightly. This change also fixes an incompatibility with Perl: the pattern
+     (?i:([^b]))(?1) should not match "ab", but previously PCRE gave a match.
+. More internal refactoring has drastically reduced the number of recursive
+     calls to match() for possessively repeated groups such as (abc)++ when
+     using pcre_exec().
+. While implementing 10, a number of bugs in the handling of groups were
+     discovered and fixed:
+     (?<=(a)+) was not diagnosed as invalid (non-fixed-length lookbehind).
+     (a|)*(?1) gave a compile-time internal error.
+     ((a|)+)+  did not notice that the outer group could match an empty string.
+     (^a|^)+   was not marked as anchored.
+     (.*a|.*)+ was not marked as matching at start or after a newline.
+. Yet more internal refactoring has removed another argument from the match()
+     function. Special calls to this function are now indicated by setting a
+     value in a variable in the "match data" data block.
+. Be more explicit in pcre_study() instead of relying on "default" for
+     opcodes that mean there is no starting character; this means that when new
+     ones are added and accidentally left out of pcre_study(), testing should
+     pick them up.
+. The -s option of pcretest has been documented for ages as being an old
+     synonym of -m (show memory usage). I have changed it to mean "force study
+     for every regex", that is, assume /S for every regex. This is similar to -i
+     and -d etc. It's slightly incompatible, but I'm hoping nobody is still
+     using it. It makes it easier to run collections of tests with and without
+     study enabled, and thereby test pcre_study() more easily. All the standard
+     tests are now run with and without -s (but some patterns can be marked as
+     "never study" - see 20 below).
+. When (*ACCEPT) was used in a subpattern that was called recursively, the
+     restoration of the capturing data to the outer values was not happening
+     correctly.
+. If a recursively called subpattern ended with (*ACCEPT) and matched an
+     empty string, and PCRE_NOTEMPTY was set, pcre_exec() thought the whole
+     pattern had matched an empty string, and so incorrectly returned a no
+     match.
+. There was optimizing code for the last branch of non-capturing parentheses,
+     and also for the obeyed branch of a conditional subexpression, which used
+     tail recursion to cut down on stack usage. Unfortunately, now that there is
+     the possibility of (*THEN) occurring in these branches, tail recursion is
+     no longer possible because the return has to be checked for (*THEN). These
+     two optimizations have therefore been removed.
+. If a pattern containing \R was studied, it was assumed that \R always
+     matched two bytes, thus causing the minimum subject length to be
+     incorrectly computed because \R can also match just one byte.
+. If a pattern containing (*ACCEPT) was studied, the minimum subject length
+     was incorrectly computed.
+. If /S is present twice on a test pattern in pcretest input, it now
+     *disables* studying, thereby overriding the use of -s on the command line
+     (see 14 above). This is necessary for one or two tests to keep the output
+     identical in both cases.
+. When (*ACCEPT) was used in an assertion that matched an empty string and
+     PCRE_NOTEMPTY was set, PCRE applied the non-empty test to the assertion.
+. When an atomic group that contained a capturing parenthesis was
+     successfully matched, but the branch in which it appeared failed, the
+     capturing was not being forgotten if a higher numbered group was later
+     captured. For example, /(?>(a))b|(a)c/ when matching "ac" set capturing
+     group 1 to "a", when in fact it should be unset. This applied to multi-
+     branched capturing and non-capturing groups, repeated or not, and also to
+     positive assertions (capturing in negative assertions does not happen
+     in PCRE) and also to nested atomic groups.
+. Add the ++ qualifier feature to pcretest, to show the remainder of the
+     subject after a captured substring, to make it easier to tell which of a
+     number of identical substrings has been captured.
+. The way atomic groups are processed by pcre_exec() has been changed so that
+     if they are repeated, backtracking one repetition now resets captured
+     values correctly. For example, if ((?>(a+)b)+aabab) is matched against
+     "aaaabaaabaabab" the value of captured group 2 is now correctly recorded as
+     "aaa". Previously, it would have been "a". As part of this code
+     refactoring, the way recursive calls are handled has also been changed.
+. If an assertion condition captured any substrings, they were not passed
+     back unless some other capturing happened later. For example, if
+     (?(?=(a))a) was matched against "a", no capturing was returned.
+. When studying a pattern that contained subroutine calls or assertions,
+     the code for finding the minimum length of a possible match was handling
+     direct recursions such as (xxx(?1)|yyy) but not mutual recursions (where
+     group 1 called group 2 while simultaneously a separate group 2 called group
+). A stack overflow occurred in this case. I have fixed this by limiting
+     the recursion depth to 10.
+. Updated RunTest.bat in the distribution to the version supplied by Tom
+     Fortmann. This supports explicit test numbers on the command line, and has
+     argument validation and error reporting.
+. An instance of \X with an unlimited repeat could fail if at any point the
+     first character it looked at was a mark character.
+. Some minor code refactoring concerning Unicode properties and scripts
+     should reduce the stack requirement of match() slightly.
+. Added the '=' option to pcretest to check the setting of unused capturing
+     slots at the end of the pattern, which are documented as being -1, but are
+     not included in the return count.
+. If \k was not followed by a braced, angle-bracketed, or quoted name, PCRE
+     compiled something random. Now it gives a compile-time error (as does
+     Perl).
+. A *MARK encountered during the processing of a positive assertion is now
+     recorded and passed back (compatible with Perl).
+. If --only-matching or --colour was set on a pcregrep call whose pattern
+     had alternative anchored branches, the search for a second match in a line
+     was done as if at the line start. Thus, for example, /^01|^02/ incorrectly
+     matched the line "0102" twice. The same bug affected patterns that started
+     with a backwards assertion. For example /\b01|\b02/ also matched "0102"
+     twice.
+. Previously, PCRE did not allow quantification of assertions. However, Perl
+     does, and because of capturing effects, quantifying parenthesized
+     assertions may at times be useful. Quantifiers are now allowed for
+     parenthesized assertions.
+. A minor code tidy in pcre_compile() when checking options for \R usage.
+. \g was being checked for fancy things in a character class, when it should
+     just be a literal "g".
+. PCRE was rejecting [:a[:digit:]] whereas Perl was not. It seems that the
+     appearance of a nested POSIX class supersedes an apparent external class.
+     For example, [:a[:digit:]b:] matches "a", "b", ":", or a digit. Also,
+     unescaped square brackets may also appear as part of class names. For
+     example, [:a[:abc]b:] gives unknown class "[:abc]b:]". PCRE now behaves
+     more like Perl. (But see 8.20/1 above.)
+. PCRE was giving an error for \N with a braced quantifier such as {1,} (this
+     was because it thought it was \N{name}, which is not supported).
+. Add minix to OS list not supporting the -S option in pcretest.
+. PCRE tries to detect cases of infinite recursion at compile time, but it
+     cannot analyze patterns in sufficient detail to catch mutual recursions
+     such as ((?1))((?2)). There is now a runtime test that gives an error if a
+     subgroup is called recursively as a subpattern for a second time at the
+     same position in the subject string. In previous releases this might have
+     been caught by the recursion limit, or it might have run out of stack.
+. A pattern such as /(?(R)a+|(?R)b)/ is quite safe, as the recursion can
+     happen only once. PCRE was, however incorrectly giving a compile time error
+     "recursive call could loop indefinitely" because it cannot analyze the
+     pattern in sufficient detail. The compile time test no longer happens when
+     PCRE is compiling a conditional subpattern, but actual runaway loops are
+     now caught at runtime (see 40 above).
+. It seems that Perl allows any characters other than a closing parenthesis
+     to be part of the NAME in (*MARK:NAME) and other backtracking verbs. PCRE
+     has been changed to be the same.
+. Updated configure.ac to put in more quoting round AC_LANG_PROGRAM etc. so
+     as not to get warnings when autogen.sh is called. Also changed
+     AC_PROG_LIBTOOL (deprecated) to LT_INIT (the current macro).
+. To help people who use pcregrep to scan files containing exceedingly long
+     lines, the following changes have been made:
+     (a) The default value of the buffer size parameter has been increased from
+K to 20K. (The actual buffer used is three times this size.)
+     (b) The default can be changed by ./configure --with-pcregrep-bufsize when
+         PCRE is built.
+     (c) A --buffer-size=n option has been added to pcregrep, to allow the size
+         to be set at run time.
+     (d) Numerical values in pcregrep options can be followed by K or M, for
+         example --buffer-size=50K.
+     (e) If a line being scanned overflows pcregrep's buffer, an error is now
+         given and the return code is set to 2.
+. Add a pointer to the latest mark to the callout data block.
+. The pattern /.(*F)/, when applied to "abc" with PCRE_PARTIAL_HARD, gave a
+     partial match of an empty string instead of no match. This was specific to
+     the use of ".".
+. The pattern /f.*/8s, when applied to "for" with PCRE_PARTIAL_HARD, gave a
+     complete match instead of a partial match. This bug was dependent on both
+     the PCRE_UTF8 and PCRE_DOTALL options being set.
+. For a pattern such as /\babc|\bdef/ pcre_study() was failing to set up the
+     starting byte set, because \b was not being ignored.
+ Version 8.12 15-Jan-2011
+ ------------------------
+.  Fixed some typos in the markup of the man pages, and wrote a script that
+     checks for such things as part of the documentation building process.
+.  On a big-endian 64-bit system, pcregrep did not correctly process the
+     --match-limit and --recursion-limit options (added for 8.11). In
+     particular, this made one of the standard tests fail. (The integer value
+     went into the wrong half of a long int.)
+.  If the --colour option was given to pcregrep with -v (invert match), it
+     did strange things, either producing crazy output, or crashing. It should,
+     of course, ignore a request for colour when reporting lines that do not
+     match.
+.  Another pcregrep bug caused similar problems if --colour was specified with
+     -M (multiline) and the pattern match finished with a line ending.
+.  In pcregrep, when a pattern that ended with a literal newline sequence was
+     matched in multiline mode, the following line was shown as part of the
+     match. This seems wrong, so I have changed it.
+.  Another pcregrep bug in multiline mode, when --colour was specified, caused
+     the check for further matches in the same line (so they could be coloured)
+     to overrun the end of the current line. If another match was found, it was
+     incorrectly shown (and then shown again when found in the next line).
+.  If pcregrep was compiled under Windows, there was a reference to the
+     function pcregrep_exit() before it was defined. I am assuming this was
+     the cause of the "error C2371: 'pcregrep_exit' : redefinition;" that was
+     reported by a user. I've moved the definition above the reference.
+ Version 8.11 10-Dec-2010
+ ------------------------
+.  (*THEN) was not working properly if there were untried alternatives prior
+     to it in the current branch. For example, in ((a|b)(*THEN)(*F)|c..) it
+     backtracked to try for "b" instead of moving to the next alternative branch
+     at the same level (in this case, to look for "c"). The Perl documentation
+     is clear that when (*THEN) is backtracked onto, it goes to the "next
+     alternative in the innermost enclosing group".
+.  (*COMMIT) was not overriding (*THEN), as it does in Perl. In a pattern
+     such as   (A(*COMMIT)B(*THEN)C|D)  any failure after matching A should
+     result in overall failure. Similarly, (*COMMIT) now overrides (*PRUNE) and
+     (*SKIP), (*SKIP) overrides (*PRUNE) and (*THEN), and (*PRUNE) overrides
+     (*THEN).
+.  If \s appeared in a character class, it removed the VT character from
+     the class, even if it had been included by some previous item, for example
+     in [\x00-\xff\s]. (This was a bug related to the fact that VT is not part
+     of \s, but is part of the POSIX "space" class.)
+.  A partial match never returns an empty string (because you can always
+     match an empty string at the end of the subject); however the checking for
+     an empty string was starting at the "start of match" point. This has been
+     changed to the "earliest inspected character" point, because the returned
+     data for a partial match starts at this character. This means that, for
+     example, /(?<=abc)def/ gives a partial match for the subject "abc"
+     (previously it gave "no match").
+.  Changes have been made to the way PCRE_PARTIAL_HARD affects the matching
+     of $, \z, \Z, \b, and \B. If the match point is at the end of the string,
+     previously a full match would be given. However, setting PCRE_PARTIAL_HARD
+     has an implication that the given string is incomplete (because a partial
+     match is preferred over a full match). For this reason, these items now
+     give a partial match in this situation. [Aside: previously, the one case
+     /t\b/ matched against "cat" with PCRE_PARTIAL_HARD set did return a partial
+     match rather than a full match, which was wrong by the old rules, but is
+     now correct.]
+.  There was a bug in the handling of #-introduced comments, recognized when
+     PCRE_EXTENDED is set, when PCRE_NEWLINE_ANY and PCRE_UTF8 were also set.
+     If a UTF-8 multi-byte character included the byte 0x85 (e.g. +U0445, whose
+     UTF-8 encoding is 0xd1,0x85), this was misinterpreted as a newline when
+     scanning for the end of the comment. (*Character* 0x85 is an "any" newline,
+     but *byte* 0x85 is not, in UTF-8 mode). This bug was present in several
+     places in pcre_compile().
+.  Related to (6) above, when pcre_compile() was skipping #-introduced
+     comments when looking ahead for named forward references to subpatterns,
+     the only newline sequence it recognized was NL. It now handles newlines
+     according to the set newline convention.
+.  SunOS4 doesn't have strerror() or strtoul(); pcregrep dealt with the
+     former, but used strtoul(), whereas pcretest avoided strtoul() but did not
+     cater for a lack of strerror(). These oversights have been fixed.
+.  Added --match-limit and --recursion-limit to pcregrep.
+. Added two casts needed to build with Visual Studio when NO_RECURSE is set.
+. When the -o option was used, pcregrep was setting a return code of 1, even
+     when matches were found, and --line-buffered was not being honoured.
+. Added an optional parentheses number to the -o and --only-matching options
+     of pcregrep.
+. Imitating Perl's /g action for multiple matches is tricky when the pattern
+     can match an empty string. The code to do it in pcretest and pcredemo
+     needed fixing:
+     (a) When the newline convention was "crlf", pcretest got it wrong, skipping
+         only one byte after an empty string match just before CRLF (this case
+         just got forgotten; "any" and "anycrlf" were OK).
+     (b) The pcretest code also had a bug, causing it to loop forever in UTF-8
+         mode when an empty string match preceded an ASCII character followed by
+         a non-ASCII character. (The code for advancing by one character rather
+         than one byte was nonsense.)
+     (c) The pcredemo.c sample program did not have any code at all to handle
+         the cases when CRLF is a valid newline sequence.
+. Neither pcre_exec() nor pcre_dfa_exec() was checking that the value given
+     as a starting offset was within the subject string. There is now a new
+     error, PCRE_ERROR_BADOFFSET, which is returned if the starting offset is
+     negative or greater than the length of the string. In order to test this,
+     pcretest is extended to allow the setting of negative starting offsets.
+. In both pcre_exec() and pcre_dfa_exec() the code for checking that the
+     starting offset points to the beginning of a UTF-8 character was
+     unnecessarily clumsy. I tidied it up.
+. Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
+     bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
+. Nobody had reported that the --include_dir option, which was added in
+     release 7.7 should have been called --include-dir (hyphen, not underscore)
+     for compatibility with GNU grep. I have changed it to --include-dir, but
+     left --include_dir as an undocumented synonym, and the same for
+     --exclude-dir, though that is not available in GNU grep, at least as of
+     release 2.5.4.
+. At a user's suggestion, the macros GETCHAR and friends (which pick up UTF-8
+     characters from a string of bytes) have been redefined so as not to use
+     loops, in order to improve performance in some environments. At the same
+     time, I abstracted some of the common code into auxiliary macros to save
+     repetition (this should not affect the compiled code).
+. If \c was followed by a multibyte UTF-8 character, bad things happened. A
+     compile-time error is now given if \c is not followed by an ASCII
+     character, that is, a byte less than 128. (In EBCDIC mode, the code is
+     different, and any byte value is allowed.)
+. Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
+     START_OPTIMIZE option, which is now allowed at compile time - but just
+     passed through to pcre_exec() or pcre_dfa_exec(). This makes it available
+     to pcregrep and other applications that have no direct access to PCRE
+     options. The new /Y option in pcretest sets this option when calling
+     pcre_compile().
+. Change 18 of release 8.01 broke the use of named subpatterns for recursive
+     back references. Groups containing recursive back references were forced to
+     be atomic by that change, but in the case of named groups, the amount of
+     memory required was incorrectly computed, leading to "Failed: internal
+     error: code overflow". This has been fixed.
+. Some patches to pcre_stringpiece.h, pcre_stringpiece_unittest.cc, and
+     pcretest.c, to avoid build problems in some Borland environments.
+ Version 8.10 25-Jun-2010
  ------------------------
 .  Added support for (*MARK:ARG) and for ARG additions to PRUNE, SKIP, and
-Line 9 
 Version 8.10 03 May-2010
+Line 474 
 Version 8.10 03 May-2010
 .  (*ACCEPT) was not working when inside an atomic group.
 .  Inside a character class, \B is treated as a literal by default, but
      faulted if PCRE_EXTRA is set. This mimics Perl's behaviour (the -w option
      causes the error). The code is unchanged, but I tidied the documentation.
 .  Inside a character class, PCRE always treated \R and \X as literals,
      whereas Perl faults them if its -w option is set. I have changed PCRE so
      that it faults them when PCRE_EXTRA is set.
 .  Added support for \N, which always matches any character other than
      newline. (It is the same as "." when PCRE_DOTALL is not set.)
 .  When compiling pcregrep with newer versions of gcc which may have
      FORTIFY_SOURCE set, several warnings "ignoring return value of 'fwrite',
      declared with attribute warn_unused_result" were given. Just casting the
      result to (void) does not stop the warnings; a more elaborate fudge is
      needed. I've used a macro to implement this.
 .  Minor change to pcretest.c to avoid a compiler warning.
 .  Added four artifical Unicode properties to help with an option to make
      \s etc use properties (see next item). The new properties are: Xan
      (alphanumeric), Xsp (Perl space), Xps (POSIX space), and Xwd (word).
 .  Added PCRE_UCP to make \b, \d, \s, \w, and certain POSIX character classes
      use Unicode properties. (*UCP) at the start of a pattern can be used to set
      this option. Modified pcretest to add /W to test this facility. Added
      REG_UCP to make it available via the POSIX interface.
-. Added --line-buffered to pcregrep.
-. In UTF-8 mode, if a pattern that was compiled with PCRE_CASELESS was
+. Added --line-buffered to pcregrep.
-     studied, and the match started with a letter with a code point greater than
+. In UTF-8 mode, if a pattern that was compiled with PCRE_CASELESS was
+     studied, and the match started with a letter with a code point greater than
 whose first byte was different to the first byte of the other case of
-     the letter, the other case of this starting letter was not recognized.
+     the letter, the other case of this starting letter was not recognized
+     (#976).
-. pcreposix.c included pcre.h before including pcre_internal.h. This caused a
-     conflict in the definition of PCRE_EXP_DECL. I have removed the include of
+. If a pattern that was studied started with a repeated Unicode property
-     pcre.h as pcre_internal.h includes pcre.h itself. (This may be a bit of
+     test, for example, \p{Nd}+, there was the theoretical possibility of
-     historical tidying that never got done.)
+     setting up an incorrect bitmap of starting bytes, but fortunately it could
+     not have actually happened in practice until change 8 above was made (it
+     added property types that matched character-matching opcodes).
+. pcre_study() now recognizes \h, \v, and \R when constructing a bit map of
+     possible starting bytes for non-anchored patterns.
+. Extended the "auto-possessify" feature of pcre_compile(). It now recognizes
+     \R, and also a number of cases that involve Unicode properties, both
+     explicit and implicit when PCRE_UCP is set.
+. If a repeated Unicode property match (e.g. \p{Lu}*) was used with non-UTF-8
+     input, it could crash or give wrong results if characters with values
+     greater than 0xc0 were present in the subject string. (Detail: it assumed
+     UTF-8 input when processing these items.)
+. Added a lot of (int) casts to avoid compiler warnings in systems where
+     size_t is 64-bit (#991).
+. Added a check for running out of memory when PCRE is compiled with
+     --disable-stack-for-recursion (#990).
+. If the last data line in a file for pcretest does not have a newline on
+     the end, a newline was missing in the output.
+. The default pcre_chartables.c file recognizes only ASCII characters (values
+     less than 128) in its various bitmaps. However, there is a facility for
+     generating tables according to the current locale when PCRE is compiled. It
+     turns out that in some environments, 0x85 and 0xa0, which are Unicode space
+     characters, are recognized by isspace() and therefore were getting set in
+     these tables, and indeed these tables seem to approximate to ISO 8859. This
+     caused a problem in UTF-8 mode when pcre_study() was used to create a list
+     of bytes that can start a match. For \s, it was including 0x85 and 0xa0,
+     which of course cannot start UTF-8 characters. I have changed the code so
+     that only real ASCII characters (less than 128) and the correct starting
+     bytes for UTF-8 encodings are set for characters greater than 127 when in
+     UTF-8 mode. (When PCRE_UCP is set - see 9 above - the code is different
+     altogether.)
+. Added the /T option to pcretest so as to be able to run tests with non-
+     standard character tables, thus making it possible to include the tests
+     used for 19 above in the standard set of tests.
+. A pattern such as (?&t)(?#()(?(DEFINE)(?<t>a)) which has a forward
+     reference to a subpattern the other side of a comment that contains an
+     opening parenthesis caused either an internal compiling error, or a
+     reference to the wrong subpattern.
  Version 8.02 19-Mar-2010

 Legend:



Removed from v.521
 


changed lines


 
Added in v.699
 Legend:



Removed from v.521
 


changed lines


 
Added in v.699
-Removed from v.521
+Added in v.699

	ViewVC Help
Powered by ViewVC 1.1.5