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revision 1275 by zherczeg, Sun Mar 10 05:32:10 2013 UTC revision 1322 by zherczeg, Wed May 1 19:42:31 2013 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.33 xx-xxxx-201x  Version 8.33 28-April-2013
5  -------------------------  --------------------------
6    
7  1.  Added 'U' to some constants that are compared to unsigned integers, to  1.  Added 'U' to some constants that are compared to unsigned integers, to
8      avoid compiler signed/unsigned warnings. Added (int) casts to unsigned      avoid compiler signed/unsigned warnings. Added (int) casts to unsigned
# Line 14  Version 8.33 xx-xxxx-201x Line 14  Version 8.33 xx-xxxx-201x
14    
15  3.  Revise the creation of config.h.generic so that all boolean macros are  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      #undefined, whereas non-boolean macros are #ifndef/#endif-ed. This makes
17      overriding via -D on the command line possible.      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  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      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      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      some benefit (and it is clearly not harmful). Also fixed the definition of
23      Xop which should be unsigned.      Xop which should be unsigned.
24    
25  5.  Related to (4), changing the definition of the intermediate variable cc  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      in repeated character loops from pcre_uchar to pcre_uint32 also gave speed
# Line 28  Version 8.33 xx-xxxx-201x Line 28  Version 8.33 xx-xxxx-201x
28    
29  6.  Fix forward search in JIT when link size is 3 or greater. Also removed some  6.  Fix forward search in JIT when link size is 3 or greater. Also removed some
30      unnecessary spaces.      unnecessary spaces.
31    
32  7.  Adjust autogen.sh and configure.ac to lose warnings given by automake 1.12  7.  Adjust autogen.sh and configure.ac to lose warnings given by automake 1.12
33      and later.      and later.
34    
35  8.  Fix two buffer over read issues in 16 and 32 bit modes. Affects JIT only.  8.  Fix two buffer over read issues in 16 and 32 bit modes. Affects JIT only.
36    
# Line 44  Version 8.33 xx-xxxx-201x Line 44  Version 8.33 xx-xxxx-201x
44      (b) Minimum length was not checked before the matching is started.      (b) Minimum length was not checked before the matching is started.
45    
46  11. The value of capture_last that is passed to callouts was incorrect in some  11. The value of capture_last that is passed to callouts was incorrect in some
47      cases when there was a capture on one path that was subsequently abandoned      cases when there was a capture on one path that was subsequently abandoned
48      after a backtrack. Also, the capture_last value is now reset after a      after a backtrack. Also, the capture_last value is now reset after a
49      recursion, since all captures are also reset in this case.      recursion, since all captures are also reset in this case.
50    
51  12. The interpreter no longer returns the "too many substrings" error in the  12. The interpreter no longer returns the "too many substrings" error in the
52      case when an overflowing capture is in a branch that is subsequently      case when an overflowing capture is in a branch that is subsequently
53      abandoned after a backtrack.      abandoned after a backtrack.
54    
55  13. In the pathological case when an offset vector of size 2 is used, pcretest  13. In the pathological case when an offset vector of size 2 is used, pcretest
56      now prints out the matched string after a yield of 0 or 1.      now prints out the matched string after a yield of 0 or 1.
57    
58  14. Inlining subpatterns in recursions, when certain conditions are fulfilled.  14. Inlining subpatterns in recursions, when certain conditions are fulfilled.
# Line 61  Version 8.33 xx-xxxx-201x Line 61  Version 8.33 xx-xxxx-201x
61  15. JIT compiler now supports 32 bit Macs thanks to Lawrence Velazquez.  15. JIT compiler now supports 32 bit Macs thanks to Lawrence Velazquez.
62    
63  16. Partial matches now set offsets[2] to the "bumpalong" value, that is, the  16. Partial matches now set offsets[2] to the "bumpalong" value, that is, the
64      offset of the starting point of the matching process, provided the offsets      offset of the starting point of the matching process, provided the offsets
65      vector is large enough.      vector is large enough.
66    
67  17. The \A escape now records a lookbehind value of 1, though its execution  17. The \A escape now records a lookbehind value of 1, though its execution
68      does not actually inspect the previous character. This is to ensure that,      does not actually inspect the previous character. This is to ensure that,
69      in partial multi-segment matching, at least one character from the old      in partial multi-segment matching, at least one character from the old
70      segment is retained when a new segment is processed. Otherwise, if there      segment is retained when a new segment is processed. Otherwise, if there
71      are no lookbehinds in the pattern, \A might match incorrectly at the start      are no lookbehinds in the pattern, \A might match incorrectly at the start
72      of a new segment.      of a new segment.
73    
74  18. Added some #ifdef __VMS code into pcretest.c to help VMS implementations.  18. Added some #ifdef __VMS code into pcretest.c to help VMS implementations.
75    
76  19. Redefined some pcre_uchar variables in pcre_exec.c as pcre_uint32; this  19. Redefined some pcre_uchar variables in pcre_exec.c as pcre_uint32; this
77      gives some modest performance improvement in 8-bit mode.      gives some modest performance improvement in 8-bit mode.
78    
79  20. Added the PCRE-specific property \p{Xuc} for matching characters that can  20. Added the PCRE-specific property \p{Xuc} for matching characters that can
80      be expressed in certain programming languages using Universal Character      be expressed in certain programming languages using Universal Character
81      Names.      Names.
82    
83  21. Unicode validation has been updated in the light of Unicode Corrigendum #9,  21. Unicode validation has been updated in the light of Unicode Corrigendum #9,
84      which points out that "non characters" are not "characters that may not      which points out that "non characters" are not "characters that may not
85      appear in Unicode strings" but rather "characters that are reserved for      appear in Unicode strings" but rather "characters that are reserved for
86      internal use and have only local meaning".      internal use and have only local meaning".
87    
88  22. When a pattern was compiled with automatic callouts (PCRE_AUTO_CALLOUT) and  22. When a pattern was compiled with automatic callouts (PCRE_AUTO_CALLOUT) and
89      there was a conditional group that depended on an assertion, if the      there was a conditional group that depended on an assertion, if the
90      assertion was false, the callout that immediately followed the alternation      assertion was false, the callout that immediately followed the alternation
91      in the condition was skipped when pcre_exec() was used for matching.      in the condition was skipped when pcre_exec() was used for matching.
92    
93  23. Allow an explicit callout to be inserted before an assertion that is the  23. Allow an explicit callout to be inserted before an assertion that is the
94      condition for a conditional group, for compatibility with automatic      condition for a conditional group, for compatibility with automatic
95      callouts, which always insert a callout at this point.      callouts, which always insert a callout at this point.
96    
97  24. In 8.31, (*COMMIT) was confined to within a recursive subpattern. Perl also  24. In 8.31, (*COMMIT) was confined to within a recursive subpattern. Perl also
98      confines (*SKIP) and (*PRUNE) in the same way, and this has now been done.      confines (*SKIP) and (*PRUNE) in the same way, and this has now been done.
99    
100  25. (*PRUNE) is now supported by the JIT compiler.  25. (*PRUNE) is now supported by the JIT compiler.
101    
102  26. Fix infinite loop when /(?<=(*SKIP)ac)a/ is matched against aa.  26. Fix infinite loop when /(?<=(*SKIP)ac)a/ is matched against aa.
103    
104  27. Fix the case where there are two or more SKIPs with arguments that may be  27. Fix the case where there are two or more SKIPs with arguments that may be
105      ignored.      ignored.
106    
107    28. (*SKIP) is now supported by the JIT compiler.
108    
109    29. (*THEN) is now supported by the JIT compiler.
110    
111    30. Update RunTest with additional test selector options.
112    
113    31. The way PCRE handles backtracking verbs has been changed in two ways.
114    
115        (1) Previously, in something like (*COMMIT)(*SKIP), COMMIT would override
116        SKIP. Now, PCRE acts on whichever backtracking verb is reached first by
117        backtracking. In some cases this makes it more Perl-compatible, but Perl's
118        rather obscure rules do not always do the same thing.
119    
120        (2) Previously, backtracking verbs were confined within assertions. This is
121        no longer the case for positive assertions, except for (*ACCEPT). Again,
122        this sometimes improves Perl compatibility, and sometimes does not.
123    
124    32. A number of tests that were in test 2 because Perl did things differently
125        have been moved to test 1, because either Perl or PCRE has changed, and
126        these tests are now compatible.
127    
128    32. Control verbs are handled in the same way in JIT and interpreter.
129    
130    33. An opening parenthesis in a MARK/PRUNE/SKIP/THEN name in a pattern that
131        contained a forward subroutine reference caused a compile error.
132    
133    34. Auto-detect and optimize limited repetitions in JIT.
134    
135    35. Implement PCRE_NEVER_UTF to lock out the use of UTF, in particular,
136        blocking (*UTF) etc.
137    
138    36. In the interpreter, maximizing pattern repetitions for characters and
139        character types now use tail recursion, which reduces stack usage.
140    
141    37. The value of the max lookbehind was not correctly preserved if a compiled
142        and saved regex was reloaded on a host of different endianness.
143    
144    38. Implemented (*LIMIT_MATCH) and (*LIMIT_RECURSION). As part of the extension
145        of the compiled pattern block, expand the flags field from 16 to 32 bits
146        because it was almost full.
147    
148  28. Experimental support of (*SKIP) backtracking verb in the JIT compiler.  39. Try madvise first before posix_madvise.
149    
150    
151  Version 8.32 30-November-2012  Version 8.32 30-November-2012
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