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revision 967 by zherczeg, Mon May 14 07:36:39 2012 UTC revision 1033 by ph10, Mon Sep 10 11:02:48 2012 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.31  Version 8.32
5  -----------------------------  ------------
6    
7    1.  Improved JIT compiler optimizations for first character search and single
8        character iterators.
9    
10    2.  Supporting IBM XL C compilers for PPC architectures in the JIT compiler.
11        Patch by Daniel Richard G.
12    
13    3.  Single character iterator optimizations in the JIT compiler.
14    
15    4.  Improved JIT compiler optimizations for character ranges.
16    
17    5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
18        Reported by Giuseppe D'Angelo.
19    
20    6.  The PCRE_STARTLINE bit, indicating that a match can occur only at the start
21        of a line, was being set incorrectly in cases where .* appeared inside
22        atomic brackets at the start of a pattern, or where there was a subsequent
23        *PRUNE or *SKIP.
24    
25    7.  Improved instruction cache flush for POWER/PowerPC.
26        Patch by Daniel Richard G.
27    
28    8.  Fixed a number of issues in pcregrep, making it more compatible with GNU
29        grep:
30    
31        (a) There is now no limit to the number of patterns to be matched.
32    
33        (b) An error is given if a pattern is too long.
34    
35        (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
36            are now supported.
37    
38        (d) --exclude-from and --include-from (multiple use) have been added.
39    
40        (e) Exclusions and inclusions now apply to all files and directories, not
41            just to those obtained from scanning a directory recursively.
42    
43        (f) Multiple uses of -f and --file-list are now supported.
44    
45        (g) In a Windows environment, the default for -d has been changed from
46            "read" (the GNU grep default) to "skip", because otherwise the presence
47            of a directory in the file list provokes an error.
48    
49        (h) The documentation has been revised and clarified in places.
50    
51    9.  Improve the matching speed of capturing brackets.
52    
53    10. Changed the meaning of \X so that it now matches a Unicode extended
54        grapheme cluster.
55    
56    11. Patch by Daniel Richard G to the autoconf files to add a macro for sorting
57        out POSIX threads when JIT support is configured.
58    
59    12. Added support for PCRE_STUDY_EXTRA_NEEDED.
60    
61    13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg
62        structure could go wrong in environments where size_t is not the same size
63        as int.
64    
65    14. Applied user-supplied patch to pcrecpp.cc to allow PCRE_NO_UTF8_CHECK to be
66        set.
67    
68    15. The EBCDIC support had decayed; later updates to the code had included
69        explicit references to (e.g.) \x0a instead of CHAR_LF. There has been a
70        general tidy up of EBCDIC-related issues, and the documentation was also
71        not quite right. There is now a test that can be run on ASCII systems to
72        check some of the EBCDIC-related things (but is it not a full test).
73    
74    
75    
76    Version 8.31 06-July-2012
77    -------------------------
78    
79  1.  Fixing a wrong JIT test case and some compiler warnings.  1.  Fixing a wrong JIT test case and some compiler warnings.
80    
# Line 95  Version 8.31 Line 167  Version 8.31
167      \w+ when the character tables indicated that \x{c4} was a word character.      \w+ when the character tables indicated that \x{c4} was a word character.
168      There were several related cases, all because the tests for doing a table      There were several related cases, all because the tests for doing a table
169      lookup were testing for characters less than 127 instead of 255.      lookup were testing for characters less than 127 instead of 255.
170    
171  27. If a pattern contains capturing parentheses that are not used in a match,  27. If a pattern contains capturing parentheses that are not used in a match,
172      their slots in the ovector are set to -1. For those that are higher than      their slots in the ovector are set to -1. For those that are higher than
173      any matched groups, this happens at the end of processing. In the case when      any matched groups, this happens at the end of processing. In the case when
174      there were back references that the ovector was too small to contain      there were back references that the ovector was too small to contain
175      (causing temporary malloc'd memory to be used during matching), and the      (causing temporary malloc'd memory to be used during matching), and the
176      highest capturing number was not used, memory off the end of the ovector      highest capturing number was not used, memory off the end of the ovector
177      was incorrectly being set to -1. (It was using the size of the temporary      was incorrectly being set to -1. (It was using the size of the temporary
178      memory instead of the true size.)      memory instead of the true size.)
179    
180  28. To catch bugs like 27 using valgrind, when pcretest is asked to specify an  28. To catch bugs like 27 using valgrind, when pcretest is asked to specify an
181      ovector size, it uses memory at the end of the block that it has got.      ovector size, it uses memory at the end of the block that it has got.
182    
183  29. Check for an overlong MARK name and give an error at compile time. The  29. Check for an overlong MARK name and give an error at compile time. The
184      limit is 255 for the 8-bit library and 65535 for the 16-bit library.      limit is 255 for the 8-bit library and 65535 for the 16-bit library.
185    
186  30. JIT compiler update.  30. JIT compiler update.
# Line 116  Version 8.31 Line 188  Version 8.31
188  31. JIT is now supported on jailbroken iOS devices. Thanks for Ruiger  31. JIT is now supported on jailbroken iOS devices. Thanks for Ruiger
189      Rill for the patch.      Rill for the patch.
190    
191    32. Put spaces around SLJIT_PRINT_D in the JIT compiler. Required by CXX11.
192    
193    33. Variable renamings in the PCRE-JIT compiler. No functionality change.
194    
195    34. Fixed typos in pcregrep: in two places there was SUPPORT_LIBZ2 instead of
196        SUPPORT_LIBBZ2. This caused a build problem when bzip2 but not gzip (zlib)
197        was enabled.
198    
199    35. Improve JIT code generation for greedy plus quantifier.
200    
201    36. When /((?:a?)*)*c/ or /((?>a?)*)*c/ was matched against "aac", it set group
202        1 to "aa" instead of to an empty string. The bug affected repeated groups
203        that could potentially match an empty string.
204    
205    37. Optimizing single character iterators in JIT.
206    
207    38. Wide characters specified with \uxxxx in JavaScript mode are now subject to
208        the same checks as \x{...} characters in non-JavaScript mode. Specifically,
209        codepoints that are too big for the mode are faulted, and in a UTF mode,
210        disallowed codepoints are also faulted.
211    
212    39. If PCRE was compiled with UTF support, in three places in the DFA
213        matcher there was code that should only have been obeyed in UTF mode, but
214        was being obeyed unconditionally. In 8-bit mode this could cause incorrect
215        processing when bytes with values greater than 127 were present. In 16-bit
216        mode the bug would be provoked by values in the range 0xfc00 to 0xdc00. In
217        both cases the values are those that cannot be the first data item in a UTF
218        character. The three items that might have provoked this were recursions,
219        possessively repeated groups, and atomic groups.
220    
221    40. Ensure that libpcre is explicitly listed in the link commands for pcretest
222        and pcregrep, because some OS require shared objects to be explicitly
223        passed to ld, causing the link step to fail if they are not.
224    
225    41. There were two incorrect #ifdefs in pcre_study.c, meaning that, in 16-bit
226        mode, patterns that started with \h* or \R* might be incorrectly matched.
227    
228    
229  Version 8.30 04-February-2012  Version 8.30 04-February-2012
230  -----------------------------  -----------------------------

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