/[pcre]/code/trunk/ChangeLog
ViewVC logotype

Diff of /code/trunk/ChangeLog

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1431 by ph10, Thu Jan 2 17:41:28 2014 UTC revision 1481 by ph10, Tue May 27 18:24:42 2014 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.35-RC1 xx-xxxx-201x  Version 8.36 xx-xxx-2014
5  -----------------------------  ------------------------
6    
7    1.  Got rid of some compiler warnings in the C++ modules that were shown up by
8        -Wmissing-field-initializers and -Wunused-parameter.
9    
10    2.  The tests for quantifiers being too big (greater than 65535) were being
11        applied after reading the number, and stupidly assuming that integer
12        overflow would give a negative number. The tests are now applied as the
13        numbers are read.
14    
15    3.  Tidy code in pcre_exec.c where two branches that used to be different are
16        now the same.
17    
18    4.  The JIT compiler did not generate match limit checks for certain
19        bracketed expressions with quantifiers. This may lead to exponential
20        backtracking, instead of returning with PCRE_ERROR_MATCHLIMIT. This
21        issue should be resolved now.
22    
23    5.  Fixed an issue, which occures when nested alternatives are optimized
24        with table jumps.
25    
26    6.  Inserted two casts and changed some ints to size_t in the light of some
27        reported 64-bit compiler warnings (Bugzilla 1477).
28    
29    7.  Fixed a bug concerned with zero-minimum possessive groups that could match
30        an empty string, which sometimes were behaving incorrectly in the
31        interpreter (though correctly in the JIT matcher). This pcretest input is
32        an example:
33    
34          '\A(?:[^"]++|"(?:[^"]*+|"")*+")++'
35          NON QUOTED "QUOT""ED" AFTER "NOT MATCHED
36    
37        the interpreter was reporting a match of 'NON QUOTED ' only, whereas the
38        JIT matcher and Perl both matched 'NON QUOTED "QUOT""ED" AFTER '. The test
39        for an empty string was breaking the inner loop and carrying on at a lower
40        level, when possessive repeated groups should always return to a higher
41        level as they have no backtrack points in them. The empty string test now
42        occurs at the outer level.
43    
44    8.  Fixed a bug that was incorrectly auto-possessifying \w+ in the pattern
45        ^\w+(?>\s*)(?<=\w) which caused it not to match "test test".
46    
47    9.  Give a compile-time error for \o{} (as Perl does) and for \x{} (which Perl
48        doesn't).
49    
50    
51    Version 8.35 04-April-2014
52    --------------------------
53    
54  1.  A new flag is set, when property checks are present in an XCLASS.  1.  A new flag is set, when property checks are present in an XCLASS.
55      When this flag is not set, PCRE can perform certain optimizations      When this flag is not set, PCRE can perform certain optimizations
# Line 30  Version 8.35-RC1 xx-xxxx-201x Line 77  Version 8.35-RC1 xx-xxxx-201x
77      above a certain treshold (e.g: 256). The only limitation is that the value      above a certain treshold (e.g: 256). The only limitation is that the value
78      must be bigger than the treshold as well. This function is useful, when      must be bigger than the treshold as well. This function is useful, when
79      the characters above the treshold are handled in the same way.      the characters above the treshold are handled in the same way.
80    
81  7.  The macros whose names start with RAWUCHAR are placeholders for a future  7.  The macros whose names start with RAWUCHAR are placeholders for a future
82      mode in which only the bottom 21 bits of 32-bit data items are used. To      mode in which only the bottom 21 bits of 32-bit data items are used. To
83      make this more memorable for those maintaining the code, the names have      make this more memorable for those maintaining the code, the names have
84      been changed to start with UCHAR21, and an extensive comment has been added      been changed to start with UCHAR21, and an extensive comment has been added
85      to their definition.      to their definition.
86    
87    8.  Add missing (new) files sljitNativeTILEGX.c and sljitNativeTILEGX-encoder.c
88        to the export list in Makefile.am (they were accidentally omitted from the
89        8.34 tarball).
90    
91    9.  The informational output from pcretest used the phrase "starting byte set"
92        which is inappropriate for the 16-bit and 32-bit libraries. As the output
93        for "first char" and "need char" really means "non-UTF-char", I've changed
94        "byte" to "char", and slightly reworded the output. The documentation about
95        these values has also been (I hope) clarified.
96    
97    10. Another JIT related optimization: use table jumps for selecting the correct
98        backtracking path, when more than four alternatives are present inside a
99        bracket.
100    
101    11. Empty match is not possible, when the minimum length is greater than zero,
102        and there is no \K in the pattern. JIT should avoid empty match checks in
103        such cases.
104    
105    12. In a caseless character class with UCP support, when a character with more
106        than one alternative case was not the first character of a range, not all
107        the alternative cases were added to the class. For example, s and \x{17f}
108        are both alternative cases for S: the class [RST] was handled correctly,
109        but [R-T] was not.
110    
111    13. The configure.ac file always checked for pthread support when JIT was
112        enabled. This is not used in Windows, so I have put this test inside a
113        check for the presence of windows.h (which was already tested for).
114    
115    14. Improve pattern prefix search by a simplified Boyer-Moore algorithm in JIT.
116        The algorithm provides a way to skip certain starting offsets, and usually
117        faster than linear prefix searches.
118    
119    15. Change 13 for 8.20 updated RunTest to check for the 'fr' locale as well
120        as for 'fr_FR' and 'french'. For some reason, however, it then used the
121        Windows-specific input and output files, which have 'french' screwed in.
122        So this could never have worked. One of the problems with locales is that
123        they aren't always the same. I have now updated RunTest so that it checks
124        the output of the locale test (test 3) against three different output
125        files, and it allows the test to pass if any one of them matches. With luck
126        this should make the test pass on some versions of Solaris where it was
127        failing. Because of the uncertainty, the script did not used to stop if
128        test 3 failed; it now does. If further versions of a French locale ever
129        come to light, they can now easily be added.
130    
131    16. If --with-pcregrep-bufsize was given a non-integer value such as "50K",
132        there was a message during ./configure, but it did not stop. This now
133        provokes an error. The invalid example in README has been corrected.
134        If a value less than the minimum is given, the minimum value has always
135        been used, but now a warning is given.
136    
137    17. If --enable-bsr-anycrlf was set, the special 16/32-bit test failed. This
138        was a bug in the test system, which is now fixed. Also, the list of various
139        configurations that are tested for each release did not have one with both
140        16/32 bits and --enable-bar-anycrlf. It now does.
141    
142    18. pcretest was missing "-C bsr" for displaying the \R default setting.
143    
144    19. Little endian PowerPC systems are supported now by the JIT compiler.
145    
146    20. The fast forward newline mechanism could enter to an infinite loop on
147        certain invalid UTF-8 input. Although we don't support these cases
148        this issue can be fixed by a performance optimization.
149    
150    21. Change 33 of 8.34 is not sufficient to ensure stack safety because it does
151        not take account if existing stack usage. There is now a new global
152        variable called pcre_stack_guard that can be set to point to an external
153        function to check stack availability. It is called at the start of
154        processing every parenthesized group.
155    
156    22. A typo in the code meant that in ungreedy mode the max/min qualifier
157        behaved like a min-possessive qualifier, and, for example, /a{1,3}b/U did
158        not match "ab".
159    
160    23. When UTF was disabled, the JIT program reported some incorrect compile
161        errors. These messages are silenced now.
162    
163    24. Experimental support for ARM-64 and MIPS-64 has been added to the JIT
164        compiler.
165    
166    25. Change all the temporary files used in RunGrepTest to be different to those
167        used by RunTest so that the tests can be run simultaneously, for example by
168        "make -j check".
169    
170    
171  Version 8.34 15-December-2013  Version 8.34 15-December-2013

Legend:
Removed from v.1431  
changed lines
  Added in v.1481

  ViewVC Help
Powered by ViewVC 1.1.5