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revision 1022 by ph10, Tue Aug 28 12:28:15 2012 UTC revision 1245 by zherczeg, Sat Feb 9 11:30:51 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    8.  Fix two buffer over read issues in 16 and 32 bit modes. Affects JIT only.
36    
37    9.  Optimizing fast_forward_start_bits in JIT.
38    
39    10. Adding experimental support for callouts in JIT, and fixing some
40        issues revealed during this work. Namely:
41    
42        (a) Unoptimized capturing brackets incorrectly reset on backtrack.
43    
44        (b) Minimum length was not checked before the matching is started.
45    
46        WARNING: Callouts are not release ready! <- this line needs to be removed when it is.
47    
48    
49    Version 8.32 30-November-2012
50    -----------------------------
51    
52  1.  Improved JIT compiler optimizations for first character search and single  1.  Improved JIT compiler optimizations for first character search and single
53      character iterators.      character iterators.
# Line 16  Version 8.32 Line 61  Version 8.32
61    
62  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
63      Reported by Giuseppe D'Angelo.      Reported by Giuseppe D'Angelo.
64    
65  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
66      of a line, was being set incorrectly in cases where .* appeared inside      of a line, was being set incorrectly in cases where .* appeared inside
67      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
68      *PRUNE or *SKIP.      *PRUNE or *SKIP.
69    
70  7.  Improved instruction cache flush for POWER/PowerPC.  7.  Improved instruction cache flush for POWER/PowerPC.
71      Patch by Daniel Richard G.      Patch by Daniel Richard G.
72    
73  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
74      grep:      grep:
75    
76      (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.
77    
78      (b) An error is given if a pattern is too long.      (b) An error is given if a pattern is too long.
79    
80      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
81          are now supported.          are now supported.
82    
83      (d) --exclude-from and --include-from (multiple use) have been added.      (d) --exclude-from and --include-from (multiple use) have been added.
84    
85      (e) Exclusions and inclusions now apply to all files and directories, not      (e) Exclusions and inclusions now apply to all files and directories, not
86          just to those obtained from scanning a directory recursively.          just to those obtained from scanning a directory recursively.
87    
88      (f) Multiple uses of -f and --file-list are now supported.      (f) Multiple uses of -f and --file-list are now supported.
89    
90      (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
91          "read" (the GNU grep default) to "skip", because otherwise the presence          "read" (the GNU grep default) to "skip", because otherwise the presence
92          of a directory in the file list provokes an error.          of a directory in the file list provokes an error.
93    
94      (h) The documentation has been revised and clarified in places.      (h) The documentation has been revised and clarified in places.
95    
96  9.  Improve the matching speed of capturing brackets.  9.  Improve the matching speed of capturing brackets.
97    
98  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
99      grapheme cluster.      grapheme cluster.
100    
101  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
102      out POSIX threads when JIT support is configured.      out POSIX threads when JIT support is configured.
103    
104  12. Added support for PCRE_STUDY_EXTRA_NEEDED.  12. Added support for PCRE_STUDY_EXTRA_NEEDED.
105    
106    13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg
107        structure could go wrong in environments where size_t is not the same size
108        as int.
109    
110    14. Applied user-supplied patch to pcrecpp.cc to allow PCRE_NO_UTF8_CHECK to be
111        set.
112    
113    15. The EBCDIC support had decayed; later updates to the code had included
114        explicit references to (e.g.) \x0a instead of CHAR_LF. There has been a
115        general tidy up of EBCDIC-related issues, and the documentation was also
116        not quite right. There is now a test that can be run on ASCII systems to
117        check some of the EBCDIC-related things (but is it not a full test).
118    
119    16. The new PCRE_STUDY_EXTRA_NEEDED option is now used by pcregrep, resulting
120        in a small tidy to the code.
121    
122    17. Fix JIT tests when UTF is disabled and both 8 and 16 bit mode are enabled.
123    
124    18. If the --only-matching (-o) option in pcregrep is specified multiple
125        times, each one causes appropriate output. For example, -o1 -o2 outputs the
126        substrings matched by the 1st and 2nd capturing parentheses. A separating
127        string can be specified by --om-separator (default empty).
128    
129    19. Improving the first n character searches.
130    
131    20. Turn case lists for horizontal and vertical white space into macros so that
132        they are defined only once.
133    
134    21. This set of changes together give more compatible Unicode case-folding
135        behaviour for characters that have more than one other case when UCP
136        support is available.
137    
138        (a) The Unicode property table now has offsets into a new table of sets of
139            three or more characters that are case-equivalent. The MultiStage2.py
140            script that generates these tables (the pcre_ucd.c file) now scans
141            CaseFolding.txt instead of UnicodeData.txt for character case
142            information.
143    
144        (b) The code for adding characters or ranges of characters to a character
145            class has been abstracted into a generalized function that also handles
146            case-independence. In UTF-mode with UCP support, this uses the new data
147            to handle characters with more than one other case.
148    
149        (c) A bug that is fixed as a result of (b) is that codepoints less than 256
150            whose other case is greater than 256 are now correctly matched
151            caselessly. Previously, the high codepoint matched the low one, but not
152            vice versa.
153    
154        (d) The processing of \h, \H, \v, and \ in character classes now makes use
155            of the new class addition function, using character lists defined as
156            macros alongside the case definitions of 20 above.
157    
158        (e) Caseless back references now work with characters that have more than
159            one other case.
160    
161        (f) General caseless matching of characters with more than one other case
162            is supported.
163    
164    22. Unicode character properties were updated from Unicode 6.2.0
165    
166    23. Improved CMake support under Windows. Patch by Daniel Richard G.
167    
168    24. Add support for 32-bit character strings, and UTF-32
169    
170    25. Major JIT compiler update (code refactoring and bugfixing).
171        Experimental Sparc 32 support is added.
172    
173    26. Applied a modified version of Daniel Richard G's patch to create
174        pcre.h.generic and config.h.generic by "make" instead of in the
175        PrepareRelease script.
176    
177    27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in
178        pcre_compile.c when checking for a zero character.
179    
180    28. Introducing a native interface for JIT. Through this interface, the compiled
181        machine code can be directly executed. The purpose of this interface is to
182        provide fast pattern matching, so several sanity checks are not performed.
183        However, feature tests are still performed. The new interface provides
184        1.4x speedup compared to the old one.
185    
186    29. If pcre_exec() or pcre_dfa_exec() was called with a negative value for
187        the subject string length, the error given was PCRE_ERROR_BADOFFSET, which
188        was confusing. There is now a new error PCRE_ERROR_BADLENGTH for this case.
189    
190    30. In 8-bit UTF-8 mode, pcretest failed to give an error for data codepoints
191        greater than 0x7fffffff (which cannot be represented in UTF-8, even under
192        the "old" RFC 2279). Instead, it ended up passing a negative length to
193        pcre_exec().
194    
195    31. Add support for GCC's visibility feature to hide internal functions.
196    
197    32. Running "pcretest -C pcre8" or "pcretest -C pcre16" gave a spurious error
198        "unknown -C option" after outputting 0 or 1.
199    
200    33. There is now support for generating a code coverage report for the test
201        suite in environments where gcc is the compiler and lcov is installed. This
202        is mainly for the benefit of the developers.
203    
204    34. If PCRE is built with --enable-valgrind, certain memory regions are marked
205        unaddressable using valgrind annotations, allowing valgrind to detect
206        invalid memory accesses. This is mainly for the benefit of the developers.
207    
208    25. (*UTF) can now be used to start a pattern in any of the three libraries.
209    
210    26. Give configure error if --enable-cpp but no C++ compiler found.
211    
212    
213  Version 8.31 06-July-2012  Version 8.31 06-July-2012

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