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revision 1033 by ph10, Mon Sep 10 11:02:48 2012 UTC revision 1238 by ph10, Sat Jan 5 16:27:59 2013 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.32  Version 8.33 xx-xxxx-201x
5  ------------  -------------------------
6    
7    1.  Added 'U' to some constants that are compared to unsigned integers, to
8        avoid compiler signed/unsigned warnings. Added (int) casts to unsigned
9        variables that are added to signed variables, to ensure the result is
10        signed and can be negated.
11    
12    2.  Applied patch by Daniel Richard G for quashing MSVC warnings to the
13        CMake config files.
14    
15    3.  Revise the creation of config.h.generic so that all boolean macros are
16        #undefined, whereas non-boolean macros are #ifndef/#endif-ed. This makes
17        overriding via -D on the command line possible.
18    
19    4.  Changing the definition of the variable "op" in pcre_exec.c from pcre_uchar
20        to unsigned int is reported to make a quite noticeable speed difference in
21        a specific Windows environment. Testing on Linux did also appear to show
22        some benefit (and it is clearly not harmful). Also fixed the definition of
23        Xop which should be unsigned.
24    
25    5.  Related to (4), changing the definition of the intermediate variable cc
26        in repeated character loops from pcre_uchar to pcre_uint32 also gave speed
27        improvements.
28    
29    
30    Version 8.32 30-November-2012
31    -----------------------------
32    
33  1.  Improved JIT compiler optimizations for first character search and single  1.  Improved JIT compiler optimizations for first character search and single
34      character iterators.      character iterators.
# Line 16  Version 8.32 Line 42  Version 8.32
42    
43  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
44      Reported by Giuseppe D'Angelo.      Reported by Giuseppe D'Angelo.
45    
46  6.  The PCRE_STARTLINE bit, indicating that a match can occur only at the start  6.  The PCRE_STARTLINE bit, indicating that a match can occur only at the start
47      of a line, was being set incorrectly in cases where .* appeared inside      of a line, was being set incorrectly in cases where .* appeared inside
48      atomic brackets at the start of a pattern, or where there was a subsequent      atomic brackets at the start of a pattern, or where there was a subsequent
49      *PRUNE or *SKIP.      *PRUNE or *SKIP.
50    
51  7.  Improved instruction cache flush for POWER/PowerPC.  7.  Improved instruction cache flush for POWER/PowerPC.
52      Patch by Daniel Richard G.      Patch by Daniel Richard G.
53    
54  8.  Fixed a number of issues in pcregrep, making it more compatible with GNU  8.  Fixed a number of issues in pcregrep, making it more compatible with GNU
55      grep:      grep:
56    
57      (a) There is now no limit to the number of patterns to be matched.      (a) There is now no limit to the number of patterns to be matched.
58    
59      (b) An error is given if a pattern is too long.      (b) An error is given if a pattern is too long.
60    
61      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
62          are now supported.          are now supported.
63    
64      (d) --exclude-from and --include-from (multiple use) have been added.      (d) --exclude-from and --include-from (multiple use) have been added.
65    
66      (e) Exclusions and inclusions now apply to all files and directories, not      (e) Exclusions and inclusions now apply to all files and directories, not
67          just to those obtained from scanning a directory recursively.          just to those obtained from scanning a directory recursively.
68    
69      (f) Multiple uses of -f and --file-list are now supported.      (f) Multiple uses of -f and --file-list are now supported.
70    
71      (g) In a Windows environment, the default for -d has been changed from      (g) In a Windows environment, the default for -d has been changed from
72          "read" (the GNU grep default) to "skip", because otherwise the presence          "read" (the GNU grep default) to "skip", because otherwise the presence
73          of a directory in the file list provokes an error.          of a directory in the file list provokes an error.
74    
75      (h) The documentation has been revised and clarified in places.      (h) The documentation has been revised and clarified in places.
76    
77  9.  Improve the matching speed of capturing brackets.  9.  Improve the matching speed of capturing brackets.
78    
79  10. Changed the meaning of \X so that it now matches a Unicode extended  10. Changed the meaning of \X so that it now matches a Unicode extended
80      grapheme cluster.      grapheme cluster.
81    
82  11. Patch by Daniel Richard G to the autoconf files to add a macro for sorting  11. Patch by Daniel Richard G to the autoconf files to add a macro for sorting
83      out POSIX threads when JIT support is configured.      out POSIX threads when JIT support is configured.
84    
85  12. Added support for PCRE_STUDY_EXTRA_NEEDED.  12. Added support for PCRE_STUDY_EXTRA_NEEDED.
86    
87  13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg  13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg
88      structure could go wrong in environments where size_t is not the same size      structure could go wrong in environments where size_t is not the same size
89      as int.      as int.
90    
91  14. Applied user-supplied patch to pcrecpp.cc to allow PCRE_NO_UTF8_CHECK to be  14. Applied user-supplied patch to pcrecpp.cc to allow PCRE_NO_UTF8_CHECK to be
92      set.      set.
93    
94  15. The EBCDIC support had decayed; later updates to the code had included  15. The EBCDIC support had decayed; later updates to the code had included
95      explicit references to (e.g.) \x0a instead of CHAR_LF. There has been a      explicit references to (e.g.) \x0a instead of CHAR_LF. There has been a
96      general tidy up of EBCDIC-related issues, and the documentation was also      general tidy up of EBCDIC-related issues, and the documentation was also
97      not quite right. There is now a test that can be run on ASCII systems to      not quite right. There is now a test that can be run on ASCII systems to
98      check some of the EBCDIC-related things (but is it not a full test).      check some of the EBCDIC-related things (but is it not a full test).
99    
100    16. The new PCRE_STUDY_EXTRA_NEEDED option is now used by pcregrep, resulting
101        in a small tidy to the code.
102    
103    17. Fix JIT tests when UTF is disabled and both 8 and 16 bit mode are enabled.
104    
105    18. If the --only-matching (-o) option in pcregrep is specified multiple
106        times, each one causes appropriate output. For example, -o1 -o2 outputs the
107        substrings matched by the 1st and 2nd capturing parentheses. A separating
108        string can be specified by --om-separator (default empty).
109    
110    19. Improving the first n character searches.
111    
112    20. Turn case lists for horizontal and vertical white space into macros so that
113        they are defined only once.
114    
115    21. This set of changes together give more compatible Unicode case-folding
116        behaviour for characters that have more than one other case when UCP
117        support is available.
118    
119        (a) The Unicode property table now has offsets into a new table of sets of
120            three or more characters that are case-equivalent. The MultiStage2.py
121            script that generates these tables (the pcre_ucd.c file) now scans
122            CaseFolding.txt instead of UnicodeData.txt for character case
123            information.
124    
125        (b) The code for adding characters or ranges of characters to a character
126            class has been abstracted into a generalized function that also handles
127            case-independence. In UTF-mode with UCP support, this uses the new data
128            to handle characters with more than one other case.
129    
130        (c) A bug that is fixed as a result of (b) is that codepoints less than 256
131            whose other case is greater than 256 are now correctly matched
132            caselessly. Previously, the high codepoint matched the low one, but not
133            vice versa.
134    
135        (d) The processing of \h, \H, \v, and \ in character classes now makes use
136            of the new class addition function, using character lists defined as
137            macros alongside the case definitions of 20 above.
138    
139        (e) Caseless back references now work with characters that have more than
140            one other case.
141    
142        (f) General caseless matching of characters with more than one other case
143            is supported.
144    
145    22. Unicode character properties were updated from Unicode 6.2.0
146    
147    23. Improved CMake support under Windows. Patch by Daniel Richard G.
148    
149    24. Add support for 32-bit character strings, and UTF-32
150    
151    25. Major JIT compiler update (code refactoring and bugfixing).
152        Experimental Sparc 32 support is added.
153    
154    26. Applied a modified version of Daniel Richard G's patch to create
155        pcre.h.generic and config.h.generic by "make" instead of in the
156        PrepareRelease script.
157    
158    27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in
159        pcre_compile.c when checking for a zero character.
160    
161    28. Introducing a native interface for JIT. Through this interface, the compiled
162        machine code can be directly executed. The purpose of this interface is to
163        provide fast pattern matching, so several sanity checks are not performed.
164        However, feature tests are still performed. The new interface provides
165        1.4x speedup compared to the old one.
166    
167    29. If pcre_exec() or pcre_dfa_exec() was called with a negative value for
168        the subject string length, the error given was PCRE_ERROR_BADOFFSET, which
169        was confusing. There is now a new error PCRE_ERROR_BADLENGTH for this case.
170    
171    30. In 8-bit UTF-8 mode, pcretest failed to give an error for data codepoints
172        greater than 0x7fffffff (which cannot be represented in UTF-8, even under
173        the "old" RFC 2279). Instead, it ended up passing a negative length to
174        pcre_exec().
175    
176    31. Add support for GCC's visibility feature to hide internal functions.
177    
178    32. Running "pcretest -C pcre8" or "pcretest -C pcre16" gave a spurious error
179        "unknown -C option" after outputting 0 or 1.
180    
181    33. There is now support for generating a code coverage report for the test
182        suite in environments where gcc is the compiler and lcov is installed. This
183        is mainly for the benefit of the developers.
184    
185    34. If PCRE is built with --enable-valgrind, certain memory regions are marked
186        unaddressable using valgrind annotations, allowing valgrind to detect
187        invalid memory accesses. This is mainly for the benefit of the developers.
188    
189    25. (*UTF) can now be used to start a pattern in any of the three libraries.
190    
191    26. Give configure error if --enable-cpp but no C++ compiler found.
192    
193    
194  Version 8.31 06-July-2012  Version 8.31 06-July-2012

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