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

Diff of /code/trunk/ChangeLog

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

revision 1393 by ph10, Fri Nov 8 16:37:21 2013 UTC revision 1414 by zherczeg, Sun Dec 22 16:27:35 2013 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.34 xx-xxxx-201x  Version 8.35-RC1 xx-xxxx-201x
5  --------------------------  -----------------------------
6    
7    1.  A new flag is set, when property checks are present in an XCLASS.
8        When this flag is not set, PCRE can perform certain optimizations
9        such as studying these XCLASS-es.
10    
11    
12    Version 8.34 15-December-2013
13    -----------------------------
14    
15  1.  Add pcre[16|32]_jit_free_unused_memory to forcibly free unused JIT  1.  Add pcre[16|32]_jit_free_unused_memory to forcibly free unused JIT
16      executable memory. Patch inspired by Carsten Klein.      executable memory. Patch inspired by Carsten Klein.
17    
18  2.  ./configure --enable-coverage defined SUPPORT_GCOV in config.h, although  2.  ./configure --enable-coverage defined SUPPORT_GCOV in config.h, although
19      this macro is never tested and has no effect, because the work to support      this macro is never tested and has no effect, because the work to support
20      coverage involves only compiling and linking options and special targets in      coverage involves only compiling and linking options and special targets in
21      the Makefile. The comment in config.h implied that defining the macro would      the Makefile. The comment in config.h implied that defining the macro would
22      enable coverage support, which is totally false. There was also support for      enable coverage support, which is totally false. There was also support for
23      setting this macro in the CMake files (my fault, I just copied it from      setting this macro in the CMake files (my fault, I just copied it from
24      configure). SUPPORT_GCOV has now been removed.      configure). SUPPORT_GCOV has now been removed.
25    
26  3.  Make a small performance improvement in strlen16() and strlen32() in  3.  Make a small performance improvement in strlen16() and strlen32() in
27      pcretest.      pcretest.
28    
29  4.  Change 36 for 8.33 left some unreachable statements in pcre_exec.c,  4.  Change 36 for 8.33 left some unreachable statements in pcre_exec.c,
30      detected by the Solaris compiler (gcc doesn't seem to be able to diagnose      detected by the Solaris compiler (gcc doesn't seem to be able to diagnose
31      these cases). There was also one in pcretest.c.      these cases). There was also one in pcretest.c.
32    
33  5.  Cleaned up a "may be uninitialized" compiler warning in pcre_exec.c.  5.  Cleaned up a "may be uninitialized" compiler warning in pcre_exec.c.
34    
35  6.  In UTF mode, the code for checking whether a group could match an empty  6.  In UTF mode, the code for checking whether a group could match an empty
36      string (which is used for indefinitely repeated groups to allow for      string (which is used for indefinitely repeated groups to allow for
# Line 31  Version 8.34 xx-xxxx-201x Line 39  Version 8.34 xx-xxxx-201x
39      data item and had a minimum repetition of zero (for example, [^\x{100}]* in      data item and had a minimum repetition of zero (for example, [^\x{100}]* in
40      UTF-8 mode). The effect was undefined: the group might or might not be      UTF-8 mode). The effect was undefined: the group might or might not be
41      deemed as matching an empty string, or the program might have crashed.      deemed as matching an empty string, or the program might have crashed.
42    
43  7.  The code for checking whether a group could match an empty string was not  7.  The code for checking whether a group could match an empty string was not
44      recognizing that \h, \H, \v, \V, and \R must match a character.      recognizing that \h, \H, \v, \V, and \R must match a character.
45    
46  8.  Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match  8.  Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
47      an empty string. If it can, pcretest shows this in its information output.      an empty string. If it can, pcretest shows this in its information output.
48    
49  9.  Fixed two related bugs that applied to Unicode extended grapheme clusters  9.  Fixed two related bugs that applied to Unicode extended grapheme clusters
50      that were repeated with a maximizing qualifier (e.g. \X* or \X{2,5}) when      that were repeated with a maximizing qualifier (e.g. \X* or \X{2,5}) when
51      matched by pcre_exec() without using JIT:      matched by pcre_exec() without using JIT:
52    
53      (a) If the rest of the pattern did not match after a maximal run of      (a) If the rest of the pattern did not match after a maximal run of
54          grapheme clusters, the code for backing up to try with fewer of them          grapheme clusters, the code for backing up to try with fewer of them
55          did not always back up over a full grapheme when characters that do not          did not always back up over a full grapheme when characters that do not
56          have the modifier quality were involved, e.g. Hangul syllables.          have the modifier quality were involved, e.g. Hangul syllables.
57    
58      (b) If the match point in a subject started with modifier character, and      (b) If the match point in a subject started with modifier character, and
59          there was no match, the code could incorrectly back up beyond the match          there was no match, the code could incorrectly back up beyond the match
60          point, and potentially beyond the first character in the subject,          point, and potentially beyond the first character in the subject,
61          leading to a segfault or an incorrect match result.          leading to a segfault or an incorrect match result.
62    
63  10. A conditional group with an assertion condition could lead to PCRE  10. A conditional group with an assertion condition could lead to PCRE
64      recording an incorrect first data item for a match if no other first data      recording an incorrect first data item for a match if no other first data
65      item was recorded. For example, the pattern (?(?=ab)ab) recorded "a" as a      item was recorded. For example, the pattern (?(?=ab)ab) recorded "a" as a
66      first data item, and therefore matched "ca" after "c" instead of at the      first data item, and therefore matched "ca" after "c" instead of at the
67      start.      start.
68    
69  11. Change 40 for 8.33 (allowing pcregrep to find empty strings) showed up a  11. Change 40 for 8.33 (allowing pcregrep to find empty strings) showed up a
70      bug that caused the command "echo a | ./pcregrep -M '|a'" to loop.      bug that caused the command "echo a | ./pcregrep -M '|a'" to loop.
71    
72  12. The source of pcregrep now includes z/OS-specific code so that it can be  12. The source of pcregrep now includes z/OS-specific code so that it can be
73      compiled for z/OS as part of the special z/OS distribution.      compiled for z/OS as part of the special z/OS distribution.
74    
75  13. Added the -T and -TM options to pcretest.  13. Added the -T and -TM options to pcretest.
76    
77  14. The code in pcre_compile.c for creating the table of named capturing groups  14. The code in pcre_compile.c for creating the table of named capturing groups
78      has been refactored. Instead of creating the table dynamically during the      has been refactored. Instead of creating the table dynamically during the
79      actual compiling pass, the information is remembered during the pre-compile      actual compiling pass, the information is remembered during the pre-compile
80      pass (on the stack unless there are more than 20 named groups, in which      pass (on the stack unless there are more than 20 named groups, in which
81      case malloc() is used) and the whole table is created before the actual      case malloc() is used) and the whole table is created before the actual
82      compile happens. This has simplified the code (it is now nearly 150 lines      compile happens. This has simplified the code (it is now nearly 150 lines
83      shorter) and prepared the way for better handling of references to groups      shorter) and prepared the way for better handling of references to groups
84      with duplicate names.      with duplicate names.
85    
86  15. A back reference to a named subpattern when there is more than one of the  15. A back reference to a named subpattern when there is more than one of the
87      same name now checks them in the order in which they appear in the pattern.      same name now checks them in the order in which they appear in the pattern.
88      The first one that is set is used for the reference. Previously only the      The first one that is set is used for the reference. Previously only the
89      first one was inspected. This change makes PCRE more compatible with Perl.      first one was inspected. This change makes PCRE more compatible with Perl.
90    
91  16. Unicode character properties were updated from Unicode 6.3.0.  16. Unicode character properties were updated from Unicode 6.3.0.
92    
93  17. The compile-time code for auto-possessification has been refactored, based  17. The compile-time code for auto-possessification has been refactored, based
94      on a patch by Zoltan Herczeg. It now happens after instead of during      on a patch by Zoltan Herczeg. It now happens after instead of during
95      compilation. The code is cleaner, and more cases are handled. The option      compilation. The code is cleaner, and more cases are handled. The option
96      PCRE_NO_AUTO_POSSESSIFY is added for testing purposes, and the -O and /O      PCRE_NO_AUTO_POSSESS is added for testing purposes, and the -O and /O
97      options in pcretest are provided to set it.      options in pcretest are provided to set it. It can also be set by
98        (*NO_AUTO_POSSESS) at the start of a pattern.
99  18. The character VT has been added to the set of characters that match \s and  
100      are generally treated as white space, following this same change in Perl  18. The character VT has been added to the default ("C" locale) set of
101      5.18. There is now no difference between "Perl space" and "POSIX space".      characters that match \s and are generally treated as white space,
102        following this same change in Perl 5.18. There is now no difference between
103  19. The code for checking named groups as conditions, either for being set or      "Perl space" and "POSIX space". Whether VT is treated as white space in
104        other locales depends on the locale.
105    
106    19. The code for checking named groups as conditions, either for being set or
107      for being recursed, has been refactored (this is related to 14 and 15      for being recursed, has been refactored (this is related to 14 and 15
108      above). Processing unduplicated named groups should now be as fast at      above). Processing unduplicated named groups should now be as fast at
109      numerical groups, and processing duplicated groups should be faster than      numerical groups, and processing duplicated groups should be faster than
110      before.      before.
111    
112  20. Two patches to the CMake build system, by Alexander Barkov:  20. Two patches to the CMake build system, by Alexander Barkov:
113    
114        (1) Replace the "source" command by "." in CMakeLists.txt because        (1) Replace the "source" command by "." in CMakeLists.txt because
115            "source" is a bash-ism.            "source" is a bash-ism.
116    
117        (2) Add missing HAVE_STDINT_H and HAVE_INTTYPES_H to config-cmake.h.in;        (2) Add missing HAVE_STDINT_H and HAVE_INTTYPES_H to config-cmake.h.in;
118            without these the CMake build does not work on Solaris.            without these the CMake build does not work on Solaris.
119    
120  21. Perl has changed its handling of \8 and \9. If there is no previously  21. Perl has changed its handling of \8 and \9. If there is no previously
121      encountered capturing group of those numbers, they are treated as the      encountered capturing group of those numbers, they are treated as the
122      literal characters 8 and 9 instead of a binary zero followed by the      literal characters 8 and 9 instead of a binary zero followed by the
123      literals. PCRE now does the same.      literals. PCRE now does the same.
124    
125  22. Following Perl, added \o{} to specify codepoints in octal, making it  22. Following Perl, added \o{} to specify codepoints in octal, making it
126      possible to specify values greater than 0777 and also making them      possible to specify values greater than 0777 and also making them
127      unambiguous.      unambiguous.
128    
129  23. Perl now gives an error for missing closing braces after \x{... instead of  23. Perl now gives an error for missing closing braces after \x{... instead of
130      treating the string as literal. PCRE now does the same.      treating the string as literal. PCRE now does the same.
131    
132  24. RunTest used to grumble if an inappropriate test was selected explicitly,  24. RunTest used to grumble if an inappropriate test was selected explicitly,
133      but just skip it when running all tests. This make it awkward to run ranges      but just skip it when running all tests. This make it awkward to run ranges
134      of tests when one of them was inappropriate. Now it just skips any      of tests when one of them was inappropriate. Now it just skips any
135      inappropriate tests, as it always did when running all tests.      inappropriate tests, as it always did when running all tests.
136    
137  25. If PCRE_AUTO_CALLOUT and PCRE_UCP were set for a pattern that contained  25. If PCRE_AUTO_CALLOUT and PCRE_UCP were set for a pattern that contained
138      character types such as \d or \w, too many callouts were inserted, and the      character types such as \d or \w, too many callouts were inserted, and the
139      data that they returned was rubbish.      data that they returned was rubbish.
140    
141  26. In UCP mode, \s was not matching two of the characters that Perl matches,  26. In UCP mode, \s was not matching two of the characters that Perl matches,
142      namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they      namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
143      were matched by \h. The code has now been refactored so that the lists of      were matched by \h. The code has now been refactored so that the lists of
144      the horizontal and vertical whitespace characters used for \h and \v (which      the horizontal and vertical whitespace characters used for \h and \v (which
145      are defined only in one place) are now also used for \s.      are defined only in one place) are now also used for \s.
146    
147  27. Add JIT support for the 64 bit TileGX architecture.  27. Add JIT support for the 64 bit TileGX architecture.
148      Patch by Jiong Wang (Tilera Corporation).      Patch by Jiong Wang (Tilera Corporation).
149    
150  28. Possessive quantifiers for classes (both explicit and automatically  28. Possessive quantifiers for classes (both explicit and automatically
151      generated) now use special opcodes instead of wrapping in ONCE brackets.      generated) now use special opcodes instead of wrapping in ONCE brackets.
152    
153  29. Whereas an item such as A{4}+ ignored the possessivenes of the quantifier  29. Whereas an item such as A{4}+ ignored the possessivenes of the quantifier
154      (because it's meaningless), this was not happening when PCRE_CASELESS was      (because it's meaningless), this was not happening when PCRE_CASELESS was
155      set. Not wrong, but inefficient.      set. Not wrong, but inefficient.
156    
157  30. Updated perltest.pl to add /u (force Unicode mode) when /W (use Unicode  30. Updated perltest.pl to add /u (force Unicode mode) when /W (use Unicode
158      properties for \w, \d, etc) is present in a test regex. Otherwise if the      properties for \w, \d, etc) is present in a test regex. Otherwise if the
159      test contains no characters greater than 255, Perl doesn't realise it      test contains no characters greater than 255, Perl doesn't realise it
160      should be using Unicode semantics.      should be using Unicode semantics.
161    
162  31. Upgraded the handling of the POSIX classes [:graph:], [:print:], and  31. Upgraded the handling of the POSIX classes [:graph:], [:print:], and
163      [:punct:] when PCRE_UCP is set so as to include the same characters as Perl      [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
164      does in Unicode mode.      does in Unicode mode.
165    
166  32. Added the "forbid" facility to pcretest so that putting tests into the  32. Added the "forbid" facility to pcretest so that putting tests into the
167      wrong test files can sometimes be quickly detected.      wrong test files can sometimes be quickly detected.
168    
169  33. There is now a limit (default 250) on the depth of nesting of parentheses.  33. There is now a limit (default 250) on the depth of nesting of parentheses.
170      This limit is imposed to control the amount of system stack used at compile      This limit is imposed to control the amount of system stack used at compile
171      time. It can be changed at build time by --with-parens-nest-limit=xxx or      time. It can be changed at build time by --with-parens-nest-limit=xxx or
172      the equivalent in CMake.      the equivalent in CMake.
173    
174  34. Character classes such as [A-\d] or [a-[:digit:]] now cause compile-time  34. Character classes such as [A-\d] or [a-[:digit:]] now cause compile-time
175      errors. Perl warns for these when in warning mode, but PCRE has no facility      errors. Perl warns for these when in warning mode, but PCRE has no facility
176      for giving warnings.      for giving warnings.
177    
178  35. Change 34 for 8.13 allowed quantifiers on assertions, because Perl does.  35. Change 34 for 8.13 allowed quantifiers on assertions, because Perl does.
179      However, this was not working for (?!) because it is optimized to (*FAIL),      However, this was not working for (?!) because it is optimized to (*FAIL),
180      for which PCRE does not allow quantifiers. The optimization is now disabled      for which PCRE does not allow quantifiers. The optimization is now disabled
181      when a quantifier follows (?!). I can't see any use for this, but it makes      when a quantifier follows (?!). I can't see any use for this, but it makes
182      things uniform.      things uniform.
183    
184    36. Perl no longer allows group names to start with digits, so I have made this
185        change also in PCRE. It simplifies the code a bit.
186    
187    37. In extended mode, Perl ignores spaces before a + that indicates a
188        possessive quantifier. PCRE allowed a space before the quantifier, but not
189        before the possessive +. It now does.
190    
191    38. The use of \K (reset reported match start) within a repeated possessive
192        group such as (a\Kb)*+ was not working.
193    
194    40. Document that the same character tables must be used at compile time and
195        run time, and that the facility to pass tables to pcre_exec() and
196        pcre_dfa_exec() is for use only with saved/restored patterns.
197    
198    41. Applied Jeff Trawick's patch CMakeLists.txt, which "provides two new
199        features for Builds with MSVC:
200    
201        1. Support pcre.rc and/or pcreposix.rc (as is already done for MinGW
202           builds). The .rc files can be used to set FileDescription and many other
203           attributes.
204    
205        2. Add an option (-DINSTALL_MSVC_PDB) to enable installation of .pdb files.
206           This allows higher-level build scripts which want .pdb files to avoid
207           hard-coding the exact files needed."
208    
209    42. Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
210        mean "start of word" and "end of word", respectively, as a transition aid.
211    
212    43. A minimizing repeat of a class containing codepoints greater than 255 in
213        non-UTF 16-bit or 32-bit modes caused an internal error when PCRE was
214        compiled to use the heap for recursion.
215    
216    44. Got rid of some compiler warnings for unused variables when UTF but not UCP
217        is configured.
218    
219    
220  Version 8.33 28-May-2013  Version 8.33 28-May-2013

Legend:
Removed from v.1393  
changed lines
  Added in v.1414

  ViewVC Help
Powered by ViewVC 1.1.5