/[pcre]/code/trunk/ChangeLog
ViewVC logotype

Diff of /code/trunk/ChangeLog

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1187 by zherczeg, Mon Oct 29 11:30:45 2012 UTC revision 1411 by ph10, Fri Dec 6 17:11:44 2013 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.32  Version 8.34 19-November-2013
5  ------------  -----------------------------
6    
7    1.  Add pcre[16|32]_jit_free_unused_memory to forcibly free unused JIT
8        executable memory. Patch inspired by Carsten Klein.
9    
10    2.  ./configure --enable-coverage defined SUPPORT_GCOV in config.h, although
11        this macro is never tested and has no effect, because the work to support
12        coverage involves only compiling and linking options and special targets in
13        the Makefile. The comment in config.h implied that defining the macro would
14        enable coverage support, which is totally false. There was also support for
15        setting this macro in the CMake files (my fault, I just copied it from
16        configure). SUPPORT_GCOV has now been removed.
17    
18    3.  Make a small performance improvement in strlen16() and strlen32() in
19        pcretest.
20    
21    4.  Change 36 for 8.33 left some unreachable statements in pcre_exec.c,
22        detected by the Solaris compiler (gcc doesn't seem to be able to diagnose
23        these cases). There was also one in pcretest.c.
24    
25    5.  Cleaned up a "may be uninitialized" compiler warning in pcre_exec.c.
26    
27    6.  In UTF mode, the code for checking whether a group could match an empty
28        string (which is used for indefinitely repeated groups to allow for
29        breaking an infinite loop) was broken when the group contained a repeated
30        negated single-character class with a character that occupied more than one
31        data item and had a minimum repetition of zero (for example, [^\x{100}]* in
32        UTF-8 mode). The effect was undefined: the group might or might not be
33        deemed as matching an empty string, or the program might have crashed.
34    
35    7.  The code for checking whether a group could match an empty string was not
36        recognizing that \h, \H, \v, \V, and \R must match a character.
37    
38    8.  Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
39        an empty string. If it can, pcretest shows this in its information output.
40    
41    9.  Fixed two related bugs that applied to Unicode extended grapheme clusters
42        that were repeated with a maximizing qualifier (e.g. \X* or \X{2,5}) when
43        matched by pcre_exec() without using JIT:
44    
45        (a) If the rest of the pattern did not match after a maximal run of
46            grapheme clusters, the code for backing up to try with fewer of them
47            did not always back up over a full grapheme when characters that do not
48            have the modifier quality were involved, e.g. Hangul syllables.
49    
50        (b) If the match point in a subject started with modifier character, and
51            there was no match, the code could incorrectly back up beyond the match
52            point, and potentially beyond the first character in the subject,
53            leading to a segfault or an incorrect match result.
54    
55    10. A conditional group with an assertion condition could lead to PCRE
56        recording an incorrect first data item for a match if no other first data
57        item was recorded. For example, the pattern (?(?=ab)ab) recorded "a" as a
58        first data item, and therefore matched "ca" after "c" instead of at the
59        start.
60    
61    11. Change 40 for 8.33 (allowing pcregrep to find empty strings) showed up a
62        bug that caused the command "echo a | ./pcregrep -M '|a'" to loop.
63    
64    12. The source of pcregrep now includes z/OS-specific code so that it can be
65        compiled for z/OS as part of the special z/OS distribution.
66    
67    13. Added the -T and -TM options to pcretest.
68    
69    14. The code in pcre_compile.c for creating the table of named capturing groups
70        has been refactored. Instead of creating the table dynamically during the
71        actual compiling pass, the information is remembered during the pre-compile
72        pass (on the stack unless there are more than 20 named groups, in which
73        case malloc() is used) and the whole table is created before the actual
74        compile happens. This has simplified the code (it is now nearly 150 lines
75        shorter) and prepared the way for better handling of references to groups
76        with duplicate names.
77    
78    15. A back reference to a named subpattern when there is more than one of the
79        same name now checks them in the order in which they appear in the pattern.
80        The first one that is set is used for the reference. Previously only the
81        first one was inspected. This change makes PCRE more compatible with Perl.
82    
83    16. Unicode character properties were updated from Unicode 6.3.0.
84    
85    17. The compile-time code for auto-possessification has been refactored, based
86        on a patch by Zoltan Herczeg. It now happens after instead of during
87        compilation. The code is cleaner, and more cases are handled. The option
88        PCRE_NO_AUTO_POSSESS is added for testing purposes, and the -O and /O
89        options in pcretest are provided to set it. It can also be set by
90        (*NO_AUTO_POSSESS) at the start of a pattern.
91    
92    18. The character VT has been added to the default ("C" locale) set of
93        characters that match \s and are generally treated as white space,
94        following this same change in Perl 5.18. There is now no difference between
95        "Perl space" and "POSIX space". Whether VT is treated as white space in
96        other locales depends on the locale.
97    
98    19. The code for checking named groups as conditions, either for being set or
99        for being recursed, has been refactored (this is related to 14 and 15
100        above). Processing unduplicated named groups should now be as fast at
101        numerical groups, and processing duplicated groups should be faster than
102        before.
103    
104    20. Two patches to the CMake build system, by Alexander Barkov:
105    
106          (1) Replace the "source" command by "." in CMakeLists.txt because
107              "source" is a bash-ism.
108    
109          (2) Add missing HAVE_STDINT_H and HAVE_INTTYPES_H to config-cmake.h.in;
110              without these the CMake build does not work on Solaris.
111    
112    21. Perl has changed its handling of \8 and \9. If there is no previously
113        encountered capturing group of those numbers, they are treated as the
114        literal characters 8 and 9 instead of a binary zero followed by the
115        literals. PCRE now does the same.
116    
117    22. Following Perl, added \o{} to specify codepoints in octal, making it
118        possible to specify values greater than 0777 and also making them
119        unambiguous.
120    
121    23. Perl now gives an error for missing closing braces after \x{... instead of
122        treating the string as literal. PCRE now does the same.
123    
124    24. RunTest used to grumble if an inappropriate test was selected explicitly,
125        but just skip it when running all tests. This make it awkward to run ranges
126        of tests when one of them was inappropriate. Now it just skips any
127        inappropriate tests, as it always did when running all tests.
128    
129    25. If PCRE_AUTO_CALLOUT and PCRE_UCP were set for a pattern that contained
130        character types such as \d or \w, too many callouts were inserted, and the
131        data that they returned was rubbish.
132    
133    26. In UCP mode, \s was not matching two of the characters that Perl matches,
134        namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
135        were matched by \h. The code has now been refactored so that the lists of
136        the horizontal and vertical whitespace characters used for \h and \v (which
137        are defined only in one place) are now also used for \s.
138    
139    27. Add JIT support for the 64 bit TileGX architecture.
140        Patch by Jiong Wang (Tilera Corporation).
141    
142    28. Possessive quantifiers for classes (both explicit and automatically
143        generated) now use special opcodes instead of wrapping in ONCE brackets.
144    
145    29. Whereas an item such as A{4}+ ignored the possessivenes of the quantifier
146        (because it's meaningless), this was not happening when PCRE_CASELESS was
147        set. Not wrong, but inefficient.
148    
149    30. Updated perltest.pl to add /u (force Unicode mode) when /W (use Unicode
150        properties for \w, \d, etc) is present in a test regex. Otherwise if the
151        test contains no characters greater than 255, Perl doesn't realise it
152        should be using Unicode semantics.
153    
154    31. Upgraded the handling of the POSIX classes [:graph:], [:print:], and
155        [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
156        does in Unicode mode.
157    
158    32. Added the "forbid" facility to pcretest so that putting tests into the
159        wrong test files can sometimes be quickly detected.
160    
161    33. There is now a limit (default 250) on the depth of nesting of parentheses.
162        This limit is imposed to control the amount of system stack used at compile
163        time. It can be changed at build time by --with-parens-nest-limit=xxx or
164        the equivalent in CMake.
165    
166    34. Character classes such as [A-\d] or [a-[:digit:]] now cause compile-time
167        errors. Perl warns for these when in warning mode, but PCRE has no facility
168        for giving warnings.
169    
170    35. Change 34 for 8.13 allowed quantifiers on assertions, because Perl does.
171        However, this was not working for (?!) because it is optimized to (*FAIL),
172        for which PCRE does not allow quantifiers. The optimization is now disabled
173        when a quantifier follows (?!). I can't see any use for this, but it makes
174        things uniform.
175    
176    36. Perl no longer allows group names to start with digits, so I have made this
177        change also in PCRE. It simplifies the code a bit.
178    
179    37. In extended mode, Perl ignores spaces before a + that indicates a
180        possessive quantifier. PCRE allowed a space before the quantifier, but not
181        before the possessive +. It now does.
182    
183    38. The use of \K (reset reported match start) within a repeated possessive
184        group such as (a\Kb)*+ was not working.
185    
186    40. Document that the same character tables must be used at compile time and
187        run time, and that the facility to pass tables to pcre_exec() and
188        pcre_dfa_exec() is for use only with saved/restored patterns.
189    
190    41. Applied Jeff Trawick's patch CMakeLists.txt, which "provides two new
191        features for Builds with MSVC:
192    
193        1. Support pcre.rc and/or pcreposix.rc (as is already done for MinGW
194           builds). The .rc files can be used to set FileDescription and many other
195           attributes.
196    
197        2. Add an option (-DINSTALL_MSVC_PDB) to enable installation of .pdb files.
198           This allows higher-level build scripts which want .pdb files to avoid
199           hard-coding the exact files needed."
200    
201    42. Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
202        mean "start of word" and "end of word", respectively, as a transition aid.
203    
204    43. A minimizing repeat of a class containing codepoints greater than 255 in
205        non-UTF 16-bit or 32-bit modes caused an internal error when PCRE was
206        compiled to use the heap for recursion.
207    
208    44. Got rid of some compiler warnings for unused variables when UTF but not UCP
209        is configured.
210    
211    
212    Version 8.33 28-May-2013
213    ------------------------
214    
215    1.  Added 'U' to some constants that are compared to unsigned integers, to
216        avoid compiler signed/unsigned warnings. Added (int) casts to unsigned
217        variables that are added to signed variables, to ensure the result is
218        signed and can be negated.
219    
220    2.  Applied patch by Daniel Richard G for quashing MSVC warnings to the
221        CMake config files.
222    
223    3.  Revise the creation of config.h.generic so that all boolean macros are
224        #undefined, whereas non-boolean macros are #ifndef/#endif-ed. This makes
225        overriding via -D on the command line possible.
226    
227    4.  Changing the definition of the variable "op" in pcre_exec.c from pcre_uchar
228        to unsigned int is reported to make a quite noticeable speed difference in
229        a specific Windows environment. Testing on Linux did also appear to show
230        some benefit (and it is clearly not harmful). Also fixed the definition of
231        Xop which should be unsigned.
232    
233    5.  Related to (4), changing the definition of the intermediate variable cc
234        in repeated character loops from pcre_uchar to pcre_uint32 also gave speed
235        improvements.
236    
237    6.  Fix forward search in JIT when link size is 3 or greater. Also removed some
238        unnecessary spaces.
239    
240    7.  Adjust autogen.sh and configure.ac to lose warnings given by automake 1.12
241        and later.
242    
243    8.  Fix two buffer over read issues in 16 and 32 bit modes. Affects JIT only.
244    
245    9.  Optimizing fast_forward_start_bits in JIT.
246    
247    10. Adding support for callouts in JIT, and fixing some issues revealed
248        during this work. Namely:
249    
250        (a) Unoptimized capturing brackets incorrectly reset on backtrack.
251    
252        (b) Minimum length was not checked before the matching is started.
253    
254    11. The value of capture_last that is passed to callouts was incorrect in some
255        cases when there was a capture on one path that was subsequently abandoned
256        after a backtrack. Also, the capture_last value is now reset after a
257        recursion, since all captures are also reset in this case.
258    
259    12. The interpreter no longer returns the "too many substrings" error in the
260        case when an overflowing capture is in a branch that is subsequently
261        abandoned after a backtrack.
262    
263    13. In the pathological case when an offset vector of size 2 is used, pcretest
264        now prints out the matched string after a yield of 0 or 1.
265    
266    14. Inlining subpatterns in recursions, when certain conditions are fulfilled.
267        Only supported by the JIT compiler at the moment.
268    
269    15. JIT compiler now supports 32 bit Macs thanks to Lawrence Velazquez.
270    
271    16. Partial matches now set offsets[2] to the "bumpalong" value, that is, the
272        offset of the starting point of the matching process, provided the offsets
273        vector is large enough.
274    
275    17. The \A escape now records a lookbehind value of 1, though its execution
276        does not actually inspect the previous character. This is to ensure that,
277        in partial multi-segment matching, at least one character from the old
278        segment is retained when a new segment is processed. Otherwise, if there
279        are no lookbehinds in the pattern, \A might match incorrectly at the start
280        of a new segment.
281    
282    18. Added some #ifdef __VMS code into pcretest.c to help VMS implementations.
283    
284    19. Redefined some pcre_uchar variables in pcre_exec.c as pcre_uint32; this
285        gives some modest performance improvement in 8-bit mode.
286    
287    20. Added the PCRE-specific property \p{Xuc} for matching characters that can
288        be expressed in certain programming languages using Universal Character
289        Names.
290    
291    21. Unicode validation has been updated in the light of Unicode Corrigendum #9,
292        which points out that "non characters" are not "characters that may not
293        appear in Unicode strings" but rather "characters that are reserved for
294        internal use and have only local meaning".
295    
296    22. When a pattern was compiled with automatic callouts (PCRE_AUTO_CALLOUT) and
297        there was a conditional group that depended on an assertion, if the
298        assertion was false, the callout that immediately followed the alternation
299        in the condition was skipped when pcre_exec() was used for matching.
300    
301    23. Allow an explicit callout to be inserted before an assertion that is the
302        condition for a conditional group, for compatibility with automatic
303        callouts, which always insert a callout at this point.
304    
305    24. In 8.31, (*COMMIT) was confined to within a recursive subpattern. Perl also
306        confines (*SKIP) and (*PRUNE) in the same way, and this has now been done.
307    
308    25. (*PRUNE) is now supported by the JIT compiler.
309    
310    26. Fix infinite loop when /(?<=(*SKIP)ac)a/ is matched against aa.
311    
312    27. Fix the case where there are two or more SKIPs with arguments that may be
313        ignored.
314    
315    28. (*SKIP) is now supported by the JIT compiler.
316    
317    29. (*THEN) is now supported by the JIT compiler.
318    
319    30. Update RunTest with additional test selector options.
320    
321    31. The way PCRE handles backtracking verbs has been changed in two ways.
322    
323        (1) Previously, in something like (*COMMIT)(*SKIP), COMMIT would override
324        SKIP. Now, PCRE acts on whichever backtracking verb is reached first by
325        backtracking. In some cases this makes it more Perl-compatible, but Perl's
326        rather obscure rules do not always do the same thing.
327    
328        (2) Previously, backtracking verbs were confined within assertions. This is
329        no longer the case for positive assertions, except for (*ACCEPT). Again,
330        this sometimes improves Perl compatibility, and sometimes does not.
331    
332    32. A number of tests that were in test 2 because Perl did things differently
333        have been moved to test 1, because either Perl or PCRE has changed, and
334        these tests are now compatible.
335    
336    32. Backtracking control verbs are now handled in the same way in JIT and
337        interpreter.
338    
339    33. An opening parenthesis in a MARK/PRUNE/SKIP/THEN name in a pattern that
340        contained a forward subroutine reference caused a compile error.
341    
342    34. Auto-detect and optimize limited repetitions in JIT.
343    
344    35. Implement PCRE_NEVER_UTF to lock out the use of UTF, in particular,
345        blocking (*UTF) etc.
346    
347    36. In the interpreter, maximizing pattern repetitions for characters and
348        character types now use tail recursion, which reduces stack usage.
349    
350    37. The value of the max lookbehind was not correctly preserved if a compiled
351        and saved regex was reloaded on a host of different endianness.
352    
353    38. Implemented (*LIMIT_MATCH) and (*LIMIT_RECURSION). As part of the extension
354        of the compiled pattern block, expand the flags field from 16 to 32 bits
355        because it was almost full.
356    
357    39. Try madvise first before posix_madvise.
358    
359    40. Change 7 for PCRE 7.9 made it impossible for pcregrep to find empty lines
360        with a pattern such as ^$. It has taken 4 years for anybody to notice! The
361        original change locked out all matches of empty strings. This has been
362        changed so that one match of an empty string per line is recognized.
363        Subsequent searches on the same line (for colouring or for --only-matching,
364        for example) do not recognize empty strings.
365    
366    41. Applied a user patch to fix a number of spelling mistakes in comments.
367    
368    42. Data lines longer than 65536 caused pcretest to crash.
369    
370    43. Clarified the data type for length and startoffset arguments for pcre_exec
371        and pcre_dfa_exec in the function-specific man pages, where they were
372        explicitly stated to be in bytes, never having been updated. I also added
373        some clarification to the pcreapi man page.
374    
375    44. A call to pcre_dfa_exec() with an output vector size less than 2 caused
376        a segmentation fault.
377    
378    
379    Version 8.32 30-November-2012
380    -----------------------------
381    
382  1.  Improved JIT compiler optimizations for first character search and single  1.  Improved JIT compiler optimizations for first character search and single
383      character iterators.      character iterators.
# Line 16  Version 8.32 Line 391  Version 8.32
391    
392  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.  5.  Rename the "leave" variable names to "quit" to improve WinCE compatibility.
393      Reported by Giuseppe D'Angelo.      Reported by Giuseppe D'Angelo.
394    
395  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
396      of a line, was being set incorrectly in cases where .* appeared inside      of a line, was being set incorrectly in cases where .* appeared inside
397      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
398      *PRUNE or *SKIP.      *PRUNE or *SKIP.
399    
400  7.  Improved instruction cache flush for POWER/PowerPC.  7.  Improved instruction cache flush for POWER/PowerPC.
401      Patch by Daniel Richard G.      Patch by Daniel Richard G.
402    
403  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
404      grep:      grep:
405    
406      (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.
407    
408      (b) An error is given if a pattern is too long.      (b) An error is given if a pattern is too long.
409    
410      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir      (c) Multiple uses of --exclude, --exclude-dir, --include, and --include-dir
411          are now supported.          are now supported.
412    
413      (d) --exclude-from and --include-from (multiple use) have been added.      (d) --exclude-from and --include-from (multiple use) have been added.
414    
415      (e) Exclusions and inclusions now apply to all files and directories, not      (e) Exclusions and inclusions now apply to all files and directories, not
416          just to those obtained from scanning a directory recursively.          just to those obtained from scanning a directory recursively.
417    
418      (f) Multiple uses of -f and --file-list are now supported.      (f) Multiple uses of -f and --file-list are now supported.
419    
420      (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
421          "read" (the GNU grep default) to "skip", because otherwise the presence          "read" (the GNU grep default) to "skip", because otherwise the presence
422          of a directory in the file list provokes an error.          of a directory in the file list provokes an error.
423    
424      (h) The documentation has been revised and clarified in places.      (h) The documentation has been revised and clarified in places.
425    
426  9.  Improve the matching speed of capturing brackets.  9.  Improve the matching speed of capturing brackets.
427    
428  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
429      grapheme cluster.      grapheme cluster.
430    
431  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
432      out POSIX threads when JIT support is configured.      out POSIX threads when JIT support is configured.
   
 12. Added support for PCRE_STUDY_EXTRA_NEEDED.  
433    
434  13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg  12. Added support for PCRE_STUDY_EXTRA_NEEDED.
435      structure could go wrong in environments where size_t is not the same size  
436    13. In the POSIX wrapper regcomp() function, setting re_nsub field in the preg
437        structure could go wrong in environments where size_t is not the same size
438      as int.      as int.
439    
440  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
441      set.      set.
442    
443  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
444      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
445      general tidy up of EBCDIC-related issues, and the documentation was also      general tidy up of EBCDIC-related issues, and the documentation was also
446      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
447      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).
448    
449  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
450      in a small tidy to the code.      in a small tidy to the code.
451    
452  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.
453    
454  18. If the --only-matching (-o) option in pcregrep is specified multiple  18. If the --only-matching (-o) option in pcregrep is specified multiple
455      times, each one causes appropriate output. For example, -o1 -o2 outputs the      times, each one causes appropriate output. For example, -o1 -o2 outputs the
456      substrings matched by the 1st and 2nd capturing parentheses. A separating      substrings matched by the 1st and 2nd capturing parentheses. A separating
457      string can be specified by --om-separator (default empty).      string can be specified by --om-separator (default empty).
458    
459  19. Improving the first n character searches.  19. Improving the first n character searches.
460    
461  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
462      they are defined only once.      they are defined only once.
463    
464  21. This set of changes together give more compatible Unicode case-folding  21. This set of changes together give more compatible Unicode case-folding
465      behaviour for characters that have more than one other case when UCP      behaviour for characters that have more than one other case when UCP
466      support is available.      support is available.
467    
468      (a) The Unicode property table now has offsets into a new table of sets of      (a) The Unicode property table now has offsets into a new table of sets of
469          three or more characters that are case-equivalent. The MultiStage2.py          three or more characters that are case-equivalent. The MultiStage2.py
470          script that generates these tables (the pcre_ucd.c file) now scans          script that generates these tables (the pcre_ucd.c file) now scans
471          CaseFolding.txt instead of UnicodeData.txt for character case          CaseFolding.txt instead of UnicodeData.txt for character case
472          information.          information.
473    
474      (b) The code for adding characters or ranges of characters to a character      (b) The code for adding characters or ranges of characters to a character
475          class has been abstracted into a generalized function that also handles          class has been abstracted into a generalized function that also handles
476          case-independence. In UTF-mode with UCP support, this uses the new data          case-independence. In UTF-mode with UCP support, this uses the new data
477          to handle characters with more than one other case.          to handle characters with more than one other case.
478    
479      (c) A bug that is fixed as a result of (b) is that codepoints less than 256      (c) A bug that is fixed as a result of (b) is that codepoints less than 256
480          whose other case is greater than 256 are now correctly matched          whose other case is greater than 256 are now correctly matched
481          caselessly. Previously, the high codepoint matched the low one, but not          caselessly. Previously, the high codepoint matched the low one, but not
482          vice versa.          vice versa.
483    
484      (d) The processing of \h, \H, \v, and \ in character classes now makes use      (d) The processing of \h, \H, \v, and \ in character classes now makes use
485          of the new class addition function, using character lists defined as          of the new class addition function, using character lists defined as
486          macros alongside the case definitions of 20 above.          macros alongside the case definitions of 20 above.
487    
488      (e) Caseless back references now work with characters that have more than      (e) Caseless back references now work with characters that have more than
489          one other case.          one other case.
490    
491      (f) General caseless matching of characters with more than one other case      (f) General caseless matching of characters with more than one other case
492          is supported.          is supported.
493    
494  22. Unicode character properties were updated from Unicode 6.2.0  22. Unicode character properties were updated from Unicode 6.2.0
# Line 124  Version 8.32 Line 499  Version 8.32
499    
500  25. Major JIT compiler update (code refactoring and bugfixing).  25. Major JIT compiler update (code refactoring and bugfixing).
501      Experimental Sparc 32 support is added.      Experimental Sparc 32 support is added.
502    
503  26. Applied a modified version of Daniel Richard G's patch to create  26. Applied a modified version of Daniel Richard G's patch to create
504      pcre.h.generic and config.h.generic by "make" instead of in the      pcre.h.generic and config.h.generic by "make" instead of in the
505      PrepareRelease script.      PrepareRelease script.
506    
507  27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in  27. Added a definition for CHAR_NULL (helpful for the z/OS port), and use it in
508      pcre_compile.c when checking for a zero character.      pcre_compile.c when checking for a zero character.
509    
510  28. Introducing a native interface for JIT. Through this interface, the compiled  28. Introducing a native interface for JIT. Through this interface, the compiled
# Line 138  Version 8.32 Line 513  Version 8.32
513      However, feature tests are still performed. The new interface provides      However, feature tests are still performed. The new interface provides
514      1.4x speedup compared to the old one.      1.4x speedup compared to the old one.
515    
516    29. If pcre_exec() or pcre_dfa_exec() was called with a negative value for
517        the subject string length, the error given was PCRE_ERROR_BADOFFSET, which
518        was confusing. There is now a new error PCRE_ERROR_BADLENGTH for this case.
519    
520    30. In 8-bit UTF-8 mode, pcretest failed to give an error for data codepoints
521        greater than 0x7fffffff (which cannot be represented in UTF-8, even under
522        the "old" RFC 2279). Instead, it ended up passing a negative length to
523        pcre_exec().
524    
525    31. Add support for GCC's visibility feature to hide internal functions.
526    
527    32. Running "pcretest -C pcre8" or "pcretest -C pcre16" gave a spurious error
528        "unknown -C option" after outputting 0 or 1.
529    
530    33. There is now support for generating a code coverage report for the test
531        suite in environments where gcc is the compiler and lcov is installed. This
532        is mainly for the benefit of the developers.
533    
534    34. If PCRE is built with --enable-valgrind, certain memory regions are marked
535        unaddressable using valgrind annotations, allowing valgrind to detect
536        invalid memory accesses. This is mainly for the benefit of the developers.
537    
538    25. (*UTF) can now be used to start a pattern in any of the three libraries.
539    
540    26. Give configure error if --enable-cpp but no C++ compiler found.
541    
542    
543  Version 8.31 06-July-2012  Version 8.31 06-July-2012
544  -------------------------  -------------------------
# Line 1482  Version 7.9 11-Apr-09 Line 1883  Version 7.9 11-Apr-09
1883  7.  A pattern that could match an empty string could cause pcregrep to loop; it  7.  A pattern that could match an empty string could cause pcregrep to loop; it
1884      doesn't make sense to accept an empty string match in pcregrep, so I have      doesn't make sense to accept an empty string match in pcregrep, so I have
1885      locked it out (using PCRE's PCRE_NOTEMPTY option). By experiment, this      locked it out (using PCRE's PCRE_NOTEMPTY option). By experiment, this
1886      seems to be how GNU grep behaves.      seems to be how GNU grep behaves. [But see later change 40 for release
1887        8.33.]
1888    
1889  8.  The pattern (?(?=.*b)b|^) was incorrectly compiled as "match must be at  8.  The pattern (?(?=.*b)b|^) was incorrectly compiled as "match must be at
1890      start or after a newline", because the conditional assertion was not being      start or after a newline", because the conditional assertion was not being
# Line 1725  Version 7.7 07-May-08 Line 2127  Version 7.7 07-May-08
2127      containing () gave an internal compiling error instead of "reference to      containing () gave an internal compiling error instead of "reference to
2128      non-existent subpattern". Fortunately, when the pattern did exist, the      non-existent subpattern". Fortunately, when the pattern did exist, the
2129      compiled code was correct. (When scanning forwards to check for the      compiled code was correct. (When scanning forwards to check for the
2130      existencd of the subpattern, it was treating the data ']' as terminating      existence of the subpattern, it was treating the data ']' as terminating
2131      the class, so got the count wrong. When actually compiling, the reference      the class, so got the count wrong. When actually compiling, the reference
2132      was subsequently set up correctly.)      was subsequently set up correctly.)
2133    

Legend:
Removed from v.1187  
changed lines
  Added in v.1411

  ViewVC Help
Powered by ViewVC 1.1.5