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revision 735 by ph10, Thu Oct 13 15:51:27 2011 UTC revision 762 by ph10, Tue Nov 22 13:36:51 2011 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.20 10-Oct-2011  Version 8.21
5    ------------
6    
7    1.  Updating the JIT compiler.
8    
9    2.  JIT compiler now supports OP_NCREF, OP_RREF and OP_NRREF. New test cases
10        are added as well.
11    
12    3.  Fix cache-flush issue on PowerPC (It is still an experimental JIT port).
13        PCRE_EXTRA_TABLES is not suported by JIT, and should be checked before
14        calling _pcre_jit_exec. Some extra comments are added.
15    
16    4.  Mark settings inside atomic groups that do not contain any capturing
17        parentheses, for example, (?>a(*:m)), were not being passed out. This bug
18        was introduced by change 18 for 8.20.
19    
20    5.  Supporting of \x, \U and \u in JavaScript compatibility mode based on the
21        ECMA-262 standard.
22    
23    6.  Lookbehinds such as (?<=a{2}b) that contained a fixed repetition were
24        erroneously being rejected as "not fixed length" if PCRE_CASELESS was set.
25        This bug was probably introduced by change 9 of 8.13.
26    
27    7.  While fixing 6 above, I noticed that a number of other items were being
28        incorrectly rejected as "not fixed length". This arose partly because newer
29        opcodes had not been added to the fixed-length checking code. I have (a)
30        corrected the bug and added tests for these items, and (b) arranged for an
31        error to occur if an unknown opcode is encountered while checking for fixed
32        length instead of just assuming "not fixed length". The items that were
33        rejected were: (*ACCEPT), (*COMMIT), (*FAIL), (*MARK), (*PRUNE), (*SKIP),
34        (*THEN), \h, \H, \v, \V, and single character negative classes with fixed
35        repetitions, e.g. [^a]{3}, with and without PCRE_CASELESS.
36    
37    8.  A possessively repeated conditional subpattern such as (?(?=c)c|d)++ was
38        being incorrectly compiled and would have given unpredicatble results.
39    
40    9.  A possessively repeated subpattern with minimum repeat count greater than
41        one behaved incorrectly. For example, (A){2,}+ behaved as if it was
42        (A)(A)++ which meant that, after a subsequent mismatch, backtracking into
43        the first (A) could occur when it should not.
44    
45    10. Add a cast and remove a redundant test from the code.
46    
47    11. JIT should use pcre_malloc/pcre_free for allocation.
48    
49    12. Updated pcre-config so that it no longer shows -L/usr/lib, which seems
50        best practice nowadays, and helps with cross-compiling. (If the exec_prefix
51        is anything other than /usr, -L is still shown).
52    
53    13. In non-UTF-8 mode, \C is now supported in lookbehinds and DFA matching.
54    
55    14. Perl does not support \N without a following name in a [] class; PCRE now
56        also gives an error.
57    
58    15. If a forward reference was repeated with an upper limit of around 2000,
59        it caused the error "internal error: overran compiling workspace". This
60        is now checked, and causes "too many forward references" instead.
61    
62    16. A repeated forward reference in a pattern such as (a)(?2){2}(.) was
63        incorrectly expecting the subject to contain another "a" after the start.
64    
65    
66    Version 8.20 21-Oct-2011
67  ------------------------  ------------------------
68    
69  1.  Change 37 of 8.13 broke patterns like [:a]...[b:] because it thought it had  1.  Change 37 of 8.13 broke patterns like [:a]...[b:] because it thought it had
# Line 68  Version 8.20 10-Oct-2011 Line 130  Version 8.20 10-Oct-2011
130    
131  12. In some environments, the output of pcretest -C is CRLF terminated. This  12. In some environments, the output of pcretest -C is CRLF terminated. This
132      broke RunTest's code that checks for the link size. A single white space      broke RunTest's code that checks for the link size. A single white space
133      after the value is now allowed for.      character after the value is now allowed for.
134    
135  13. RunTest now checks for the "fr" locale as well as for "fr_FR" and "french".  13. RunTest now checks for the "fr" locale as well as for "fr_FR" and "french".
136      For "fr", it uses the Windows-specific input and output files.      For "fr", it uses the Windows-specific input and output files.
# Line 103  Version 8.20 10-Oct-2011 Line 165  Version 8.20 10-Oct-2011
165  19. If the PCRE_NO_START_OPTIMIZE option was set for pcre_compile(), it did not  19. If the PCRE_NO_START_OPTIMIZE option was set for pcre_compile(), it did not
166      suppress the check for a minimum subject length at run time. (If it was      suppress the check for a minimum subject length at run time. (If it was
167      given to pcre_exec() or pcre_dfa_exec() it did work.)      given to pcre_exec() or pcre_dfa_exec() it did work.)
168    
169  20. Fixed an ASCII-dependent infelicity in pcretest that would have made it  20. Fixed an ASCII-dependent infelicity in pcretest that would have made it
170      fail to work when decoding hex characters in data strings in EBCDIC      fail to work when decoding hex characters in data strings in EBCDIC
171      environments.      environments.
172    
173  21. It appears that in at least one Mac OS environment, the isxdigit() function  21. It appears that in at least one Mac OS environment, the isxdigit() function
174      is implemented as a macro that evaluates to its argument more than once,      is implemented as a macro that evaluates to its argument more than once,
175      contravening the C 90 Standard (I haven't checked a later standard). There      contravening the C 90 Standard (I haven't checked a later standard). There
176      was an instance in pcretest which caused it to go wrong when processing      was an instance in pcretest which caused it to go wrong when processing
177      \x{...} escapes in subject strings. The has been rewritten to avoid using      \x{...} escapes in subject strings. The has been rewritten to avoid using
178      things like p++ in the argument of isxdigit().      things like p++ in the argument of isxdigit().
179    
180    

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