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revision 944 by ph10, Tue Feb 28 16:49:21 2012 UTC revision 990 by zherczeg, Sun Jul 8 16:32:22 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    
18    Version 8.31 06-July-2012
19    -------------------------
20    
21  1.  Fixing a wrong JIT test case and some compiler warnings.  1.  Fixing a wrong JIT test case and some compiler warnings.
22    
23  2.  Removed a bashism from the RunTest script.  2.  Removed a bashism from the RunTest script.
24    
25  3.  Add a cast to pcre_exec.c to fix the warning "unary minus operator applied  3.  Add a cast to pcre_exec.c to fix the warning "unary minus operator applied
26      to unsigned type, result still unsigned" that was given by an MS compiler      to unsigned type, result still unsigned" that was given by an MS compiler
27      on encountering the code "-sizeof(xxx)".      on encountering the code "-sizeof(xxx)".
28    
29  4.  Partial matching support is added to the JIT compiler.  4.  Partial matching support is added to the JIT compiler.
# Line 18  Version 8.31 Line 32  Version 8.31
32      of more than one character:      of more than one character:
33    
34      (a) /^(..)\1/ did not partially match "aba" because checking references was      (a) /^(..)\1/ did not partially match "aba" because checking references was
35          done on an "all or nothing" basis. This also applied to repeated          done on an "all or nothing" basis. This also applied to repeated
36          references.          references.
37    
38      (b) \R did not give a hard partial match if \r was found at the end of the      (b) \R did not give a hard partial match if \r was found at the end of the
39          subject.          subject.
40    
41      (c) \X did not give a hard partial match after matching one or more      (c) \X did not give a hard partial match after matching one or more
42          characters at the end of the subject.          characters at the end of the subject.
43    
44      (d) When newline was set to CRLF, a pattern such as /a$/ did not recognize      (d) When newline was set to CRLF, a pattern such as /a$/ did not recognize
# Line 33  Version 8.31 Line 47  Version 8.31
47      (e) When newline was set to CRLF, the metacharacter "." did not recognize      (e) When newline was set to CRLF, the metacharacter "." did not recognize
48          a partial match for a CR character at the end of the subject string.          a partial match for a CR character at the end of the subject string.
49    
50  6.  If JIT is requested using /S++ or -s++ (instead of just /S+ or -s+) when  6.  If JIT is requested using /S++ or -s++ (instead of just /S+ or -s+) when
51      running pcretest, the text "(JIT)" added to the output whenever JIT is      running pcretest, the text "(JIT)" added to the output whenever JIT is
52      actually used to run the match.      actually used to run the match.
53    
54  7.  Individual JIT compile options can be set in pcretest by following -s+[+]  7.  Individual JIT compile options can be set in pcretest by following -s+[+]
55      or /S+[+] with a digit between 1 and 7.      or /S+[+] with a digit between 1 and 7.
56    
57  8.  OP_NOT now supports any UTF character not just single-byte ones.  8.  OP_NOT now supports any UTF character not just single-byte ones.
# Line 46  Version 8.31 Line 60  Version 8.31
60    
61  10. The command "./RunTest list" lists the available tests without actually  10. The command "./RunTest list" lists the available tests without actually
62      running any of them. (Because I keep forgetting what they all are.)      running any of them. (Because I keep forgetting what they all are.)
63    
64  11. Add PCRE_INFO_MAXLOOKBEHIND.  11. Add PCRE_INFO_MAXLOOKBEHIND.
65    
66  12. Applied a (slightly modified) user-supplied patch that improves performance  12. Applied a (slightly modified) user-supplied patch that improves performance
67      when the heap is used for recursion (compiled with --disable-stack-for-      when the heap is used for recursion (compiled with --disable-stack-for-
68      recursion). Instead of malloc and free for each heap frame each time a      recursion). Instead of malloc and free for each heap frame each time a
69      logical recursion happens, frames are retained on a chain and re-used where      logical recursion happens, frames are retained on a chain and re-used where
70      possible. This sometimes gives as much as 30% improvement.      possible. This sometimes gives as much as 30% improvement.
71    
72  13. As documented, (*COMMIT) is now confined to within a recursive subpattern  13. As documented, (*COMMIT) is now confined to within a recursive subpattern
73      call.      call.
74    
75  14. As documented, (*COMMIT) is now confined to within a positive assertion.  14. As documented, (*COMMIT) is now confined to within a positive assertion.
76    
77  15. It is now possible to link pcretest with libedit as an alternative to  15. It is now possible to link pcretest with libedit as an alternative to
78      libreadline.      libreadline.
79    
80  16. (*COMMIT) control verb is now supported by the JIT compiler.  16. (*COMMIT) control verb is now supported by the JIT compiler.
# Line 69  Version 8.31 Line 83  Version 8.31
83    
84  18. Added --file-list option to pcregrep.  18. Added --file-list option to pcregrep.
85    
86    19. Added binary file support to pcregrep, including the -a, --binary-files,
87        -I, and --text options.
88    
89    20. The madvise function is renamed for posix_madvise for QNX compatibility
90        reasons. Fixed by Giuseppe D'Angelo.
91    
92    21. Fixed a bug for backward assertions with REVERSE 0 in the JIT compiler.
93    
94    22. Changed the option for creating symbolic links for 16-bit man pages from
95        -s to -sf so that re-installing does not cause issues.
96    
97    23. Support PCRE_NO_START_OPTIMIZE in JIT as (*MARK) support requires it.
98    
99    24. Fixed a very old bug in pcretest that caused errors with restarted DFA
100        matches in certain environments (the workspace was not being correctly
101        retained). Also added to pcre_dfa_exec() a simple plausibility check on
102        some of the workspace data at the beginning of a restart.
103    
104    25. \s*\R was auto-possessifying the \s* when it should not, whereas \S*\R
105        was not doing so when it should - probably a typo introduced by SVN 528
106        (change 8.10/14).
107    
108    26. When PCRE_UCP was not set, \w+\x{c4} was incorrectly auto-possessifying the
109        \w+ when the character tables indicated that \x{c4} was a word character.
110        There were several related cases, all because the tests for doing a table
111        lookup were testing for characters less than 127 instead of 255.
112    
113    27. If a pattern contains capturing parentheses that are not used in a match,
114        their slots in the ovector are set to -1. For those that are higher than
115        any matched groups, this happens at the end of processing. In the case when
116        there were back references that the ovector was too small to contain
117        (causing temporary malloc'd memory to be used during matching), and the
118        highest capturing number was not used, memory off the end of the ovector
119        was incorrectly being set to -1. (It was using the size of the temporary
120        memory instead of the true size.)
121    
122    28. To catch bugs like 27 using valgrind, when pcretest is asked to specify an
123        ovector size, it uses memory at the end of the block that it has got.
124    
125    29. Check for an overlong MARK name and give an error at compile time. The
126        limit is 255 for the 8-bit library and 65535 for the 16-bit library.
127    
128    30. JIT compiler update.
129    
130    31. JIT is now supported on jailbroken iOS devices. Thanks for Ruiger
131        Rill for the patch.
132    
133    32. Put spaces around SLJIT_PRINT_D in the JIT compiler. Required by CXX11.
134    
135    33. Variable renamings in the PCRE-JIT compiler. No functionality change.
136    
137    34. Fixed typos in pcregrep: in two places there was SUPPORT_LIBZ2 instead of
138        SUPPORT_LIBBZ2. This caused a build problem when bzip2 but not gzip (zlib)
139        was enabled.
140    
141    35. Improve JIT code generation for greedy plus quantifier.
142    
143    36. When /((?:a?)*)*c/ or /((?>a?)*)*c/ was matched against "aac", it set group
144        1 to "aa" instead of to an empty string. The bug affected repeated groups
145        that could potentially match an empty string.
146    
147    37. Optimizing single character iterators in JIT.
148    
149    38. Wide characters specified with \uxxxx in JavaScript mode are now subject to
150        the same checks as \x{...} characters in non-JavaScript mode. Specifically,
151        codepoints that are too big for the mode are faulted, and in a UTF mode,
152        disallowed codepoints are also faulted.
153    
154    39. If PCRE was compiled with UTF support, in three places in the DFA
155        matcher there was code that should only have been obeyed in UTF mode, but
156        was being obeyed unconditionally. In 8-bit mode this could cause incorrect
157        processing when bytes with values greater than 127 were present. In 16-bit
158        mode the bug would be provoked by values in the range 0xfc00 to 0xdc00. In
159        both cases the values are those that cannot be the first data item in a UTF
160        character. The three items that might have provoked this were recursions,
161        possessively repeated groups, and atomic groups.
162    
163    40. Ensure that libpcre is explicitly listed in the link commands for pcretest
164        and pcregrep, because some OS require shared objects to be explicitly
165        passed to ld, causing the link step to fail if they are not.
166    
167    41. There were two incorrect #ifdefs in pcre_study.c, meaning that, in 16-bit
168        mode, patterns that started with \h* or \R* might be incorrectly matched.
169    
170    
171  Version 8.30 04-February-2012  Version 8.30 04-February-2012
172  -----------------------------  -----------------------------

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