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revision 971 by ph10, Fri Jun 1 16:29:43 2012 UTC revision 1022 by ph10, Tue Aug 28 12:28:15 2012 UTC
# Line 1  Line 1 
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    
62    
63    Version 8.31 06-July-2012
64    -------------------------
65    
66  1.  Fixing a wrong JIT test case and some compiler warnings.  1.  Fixing a wrong JIT test case and some compiler warnings.
67    
# Line 95  Version 8.31 Line 154  Version 8.31
154      \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.
155      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
156      lookup were testing for characters less than 127 instead of 255.      lookup were testing for characters less than 127 instead of 255.
157    
158  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,
159      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
160      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
161      there were back references that the ovector was too small to contain      there were back references that the ovector was too small to contain
162      (causing temporary malloc'd memory to be used during matching), and the      (causing temporary malloc'd memory to be used during matching), and the
163      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
164      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
165      memory instead of the true size.)      memory instead of the true size.)
166    
167  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
168      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.
169    
170  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
171      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.
172    
173  30. JIT compiler update.  30. JIT compiler update.
# Line 120  Version 8.31 Line 179  Version 8.31
179    
180  33. Variable renamings in the PCRE-JIT compiler. No functionality change.  33. Variable renamings in the PCRE-JIT compiler. No functionality change.
181    
182  34. Fixed typos in pcregrep: in two places there was SUPPORT_LIBZ2 instead of  34. Fixed typos in pcregrep: in two places there was SUPPORT_LIBZ2 instead of
183      SUPPORT_LIBBZ2. This caused a build problem when bzip2 but not gzip (zlib)      SUPPORT_LIBBZ2. This caused a build problem when bzip2 but not gzip (zlib)
184      was enabled.      was enabled.
185    
186    35. Improve JIT code generation for greedy plus quantifier.
187    
188    36. When /((?:a?)*)*c/ or /((?>a?)*)*c/ was matched against "aac", it set group
189        1 to "aa" instead of to an empty string. The bug affected repeated groups
190        that could potentially match an empty string.
191    
192    37. Optimizing single character iterators in JIT.
193    
194    38. Wide characters specified with \uxxxx in JavaScript mode are now subject to
195        the same checks as \x{...} characters in non-JavaScript mode. Specifically,
196        codepoints that are too big for the mode are faulted, and in a UTF mode,
197        disallowed codepoints are also faulted.
198    
199    39. If PCRE was compiled with UTF support, in three places in the DFA
200        matcher there was code that should only have been obeyed in UTF mode, but
201        was being obeyed unconditionally. In 8-bit mode this could cause incorrect
202        processing when bytes with values greater than 127 were present. In 16-bit
203        mode the bug would be provoked by values in the range 0xfc00 to 0xdc00. In
204        both cases the values are those that cannot be the first data item in a UTF
205        character. The three items that might have provoked this were recursions,
206        possessively repeated groups, and atomic groups.
207    
208    40. Ensure that libpcre is explicitly listed in the link commands for pcretest
209        and pcregrep, because some OS require shared objects to be explicitly
210        passed to ld, causing the link step to fail if they are not.
211    
212    41. There were two incorrect #ifdefs in pcre_study.c, meaning that, in 16-bit
213        mode, patterns that started with \h* or \R* might be incorrectly matched.
214    
215    
216  Version 8.30 04-February-2012  Version 8.30 04-February-2012
217  -----------------------------  -----------------------------

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