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revision 1041 by ph10, Sun Sep 16 10:16:27 2012 UTC revision 1240 by ph10, Wed Jan 23 16:36:41 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    6.  Fix forward search in JIT when link size is 3 or greater. Also removed some
30        unnecessary spaces.
31    
32    7.  Adjust autogen.sh and configure.ac to lose warnings given by automake 1.12
33        and later.
34    
35    
36    Version 8.32 30-November-2012
37    -----------------------------
38    
39  1.  Improved JIT compiler optimizations for first character search and single  1.  Improved JIT compiler optimizations for first character search and single
40      character iterators.      character iterators.
# Line 16  Version 8.32 Line 48  Version 8.32
48    
49  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
50      Reported by Giuseppe D'Angelo.      Reported by Giuseppe D'Angelo.
51    
52  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
53      of a line, was being set incorrectly in cases where .* appeared inside      of a line, was being set incorrectly in cases where .* appeared inside
54      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
55      *PRUNE or *SKIP.      *PRUNE or *SKIP.
56    
57  7.  Improved instruction cache flush for POWER/PowerPC.  7.  Improved instruction cache flush for POWER/PowerPC.
58      Patch by Daniel Richard G.      Patch by Daniel Richard G.
59    
60  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
61      grep:      grep:
62    
63      (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.
64    
65      (b) An error is given if a pattern is too long.      (b) An error is given if a pattern is too long.
66    
67      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
68          are now supported.          are now supported.
69    
70      (d) --exclude-from and --include-from (multiple use) have been added.      (d) --exclude-from and --include-from (multiple use) have been added.
71    
72      (e) Exclusions and inclusions now apply to all files and directories, not      (e) Exclusions and inclusions now apply to all files and directories, not
73          just to those obtained from scanning a directory recursively.          just to those obtained from scanning a directory recursively.
74    
75      (f) Multiple uses of -f and --file-list are now supported.      (f) Multiple uses of -f and --file-list are now supported.
76    
77      (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
78          "read" (the GNU grep default) to "skip", because otherwise the presence          "read" (the GNU grep default) to "skip", because otherwise the presence
79          of a directory in the file list provokes an error.          of a directory in the file list provokes an error.
80    
81      (h) The documentation has been revised and clarified in places.      (h) The documentation has been revised and clarified in places.
82    
83  9.  Improve the matching speed of capturing brackets.  9.  Improve the matching speed of capturing brackets.
84    
85  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
86      grapheme cluster.      grapheme cluster.
87    
88  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
89      out POSIX threads when JIT support is configured.      out POSIX threads when JIT support is configured.
90    
91  12. Added support for PCRE_STUDY_EXTRA_NEEDED.  12. Added support for PCRE_STUDY_EXTRA_NEEDED.
92    
93  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
94      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
95      as int.      as int.
96    
97  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
98      set.      set.
99    
100  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
101      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
102      general tidy up of EBCDIC-related issues, and the documentation was also      general tidy up of EBCDIC-related issues, and the documentation was also
103      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
104      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).
105    
106  16. The new PCRE_STUDY_EXTRA_NEEDED option is now used by pcregrep, resulting  16. The new PCRE_STUDY_EXTRA_NEEDED option is now used by pcregrep, resulting
107      in a small tidy to the code.      in a small tidy to the code.
108    
109  17. Fix JIT tests when UTF is disabled and both 8 and 16 bit mode are enabled.  17. Fix JIT tests when UTF is disabled and both 8 and 16 bit mode are enabled.
110    
111  18. If the --only-matching (-o) option in pcregrep is specified multiple  18. If the --only-matching (-o) option in pcregrep is specified multiple
112      times, each one causes appropriate output. For example, -o1 -o2 outputs the      times, each one causes appropriate output. For example, -o1 -o2 outputs the
113      substrings matched by the 1st and 2nd capturing parentheses. A separating      substrings matched by the 1st and 2nd capturing parentheses. A separating
114      string can be specified by --om-separator (default empty).      string can be specified by --om-separator (default empty).
115    
116  19. Improving the first n character searches.  19. Improving the first n character searches.
117    
118  20. Turn case lists for horizontal and vertical white space into macros so that  20. Turn case lists for horizontal and vertical white space into macros so that
119      they are defined only once.      they are defined only once.
120    
121    21. This set of changes together give more compatible Unicode case-folding
122        behaviour for characters that have more than one other case when UCP
123        support is available.
124    
125        (a) The Unicode property table now has offsets into a new table of sets of
126            three or more characters that are case-equivalent. The MultiStage2.py
127            script that generates these tables (the pcre_ucd.c file) now scans
128            CaseFolding.txt instead of UnicodeData.txt for character case
129            information.
130    
131        (b) The code for adding characters or ranges of characters to a character
132            class has been abstracted into a generalized function that also handles
133            case-independence. In UTF-mode with UCP support, this uses the new data
134            to handle characters with more than one other case.
135    
136        (c) A bug that is fixed as a result of (b) is that codepoints less than 256
137            whose other case is greater than 256 are now correctly matched
138            caselessly. Previously, the high codepoint matched the low one, but not
139            vice versa.
140    
141        (d) The processing of \h, \H, \v, and \ in character classes now makes use
142            of the new class addition function, using character lists defined as
143            macros alongside the case definitions of 20 above.
144    
145        (e) Caseless back references now work with characters that have more than
146            one other case.
147    
148        (f) General caseless matching of characters with more than one other case
149            is supported.
150    
151    22. Unicode character properties were updated from Unicode 6.2.0
152    
153    23. Improved CMake support under Windows. Patch by Daniel Richard G.
154    
155    24. Add support for 32-bit character strings, and UTF-32
156    
157    25. Major JIT compiler update (code refactoring and bugfixing).
158        Experimental Sparc 32 support is added.
159    
160    26. Applied a modified version of Daniel Richard G's patch to create
161        pcre.h.generic and config.h.generic by "make" instead of in the
162        PrepareRelease script.
163    
164    27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in
165        pcre_compile.c when checking for a zero character.
166    
167    28. Introducing a native interface for JIT. Through this interface, the compiled
168        machine code can be directly executed. The purpose of this interface is to
169        provide fast pattern matching, so several sanity checks are not performed.
170        However, feature tests are still performed. The new interface provides
171        1.4x speedup compared to the old one.
172    
173    29. If pcre_exec() or pcre_dfa_exec() was called with a negative value for
174        the subject string length, the error given was PCRE_ERROR_BADOFFSET, which
175        was confusing. There is now a new error PCRE_ERROR_BADLENGTH for this case.
176    
177    30. In 8-bit UTF-8 mode, pcretest failed to give an error for data codepoints
178        greater than 0x7fffffff (which cannot be represented in UTF-8, even under
179        the "old" RFC 2279). Instead, it ended up passing a negative length to
180        pcre_exec().
181    
182    31. Add support for GCC's visibility feature to hide internal functions.
183    
184    32. Running "pcretest -C pcre8" or "pcretest -C pcre16" gave a spurious error
185        "unknown -C option" after outputting 0 or 1.
186    
187    33. There is now support for generating a code coverage report for the test
188        suite in environments where gcc is the compiler and lcov is installed. This
189        is mainly for the benefit of the developers.
190    
191    34. If PCRE is built with --enable-valgrind, certain memory regions are marked
192        unaddressable using valgrind annotations, allowing valgrind to detect
193        invalid memory accesses. This is mainly for the benefit of the developers.
194    
195    25. (*UTF) can now be used to start a pattern in any of the three libraries.
196    
197    26. Give configure error if --enable-cpp but no C++ compiler found.
198    
199    
200  Version 8.31 06-July-2012  Version 8.31 06-July-2012
201  -------------------------  -------------------------

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