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revision 3 by nigel, Sat Feb 24 21:38:01 2007 UTC revision 11 by nigel, Sat Feb 24 21:38:17 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4    
5    Version 1.04 19-Dec-97
6    ----------------------
7    
8    1. Corrected the man page, where some "const" qualifiers had been omitted.
9    
10    2. Made debugging output print "{0,xxx}" instead of just "{,xxx}" to agree with
11    input syntax.
12    
13    3. Fixed memory leak which occurred when a regex with back references was
14    matched with an offsets vector that wasn't big enough. The temporary memory
15    that is used in this case wasn't being freed if the match failed.
16    
17    4. Tidied pcretest to ensure it frees memory that it gets.
18    
19    5. Temporary memory was being obtained in the case where the passed offsets
20    vector was exactly big enough.
21    
22    6. Corrected definition of offsetof() from change 5 below.
23    
24    7. I had screwed up change 6 below and broken the rules for the use of
25    setjmp(). Now fixed.
26    
27    
28    Version 1.03 18-Dec-97
29    ----------------------
30    
31    1. A erroneous regex with a missing opening parenthesis was correctly
32    diagnosed, but PCRE attempted to access brastack[-1], which could cause crashes
33    on some systems.
34    
35    2. Replaced offsetof(real_pcre, code) by offsetof(real_pcre, code[0]) because
36    it was reported that one broken compiler failed on the former because "code" is
37    also an independent variable.
38    
39    3. The erroneous regex a[]b caused an array overrun reference.
40    
41    4. A regex ending with a one-character negative class (e.g. /[^k]$/) did not
42    fail on data ending with that character. (It was going on too far, and checking
43    the next character, typically a binary zero.) This was specific to the
44    optimized code for single-character negative classes.
45    
46    5. Added a contributed patch from the TIN world which does the following:
47    
48      + Add an undef for memmove, in case the the system defines a macro for it.
49    
50      + Add a definition of offsetof(), in case there isn't one. (I don't know
51        the reason behind this - offsetof() is part of the ANSI standard - but
52        it does no harm).
53    
54      + Reduce the ifdef's in pcre.c using macro DPRINTF, thereby eliminating
55        most of the places where whitespace preceded '#'. I have given up and
56        allowed the remaining 2 cases to be at the margin.
57    
58      + Rename some variables in pcre to eliminate shadowing. This seems very
59        pedantic, but does no harm, of course.
60    
61    6. Moved the call to setjmp() into its own function, to get rid of warnings
62    from gcc -Wall, and avoided calling it at all unless PCRE_EXTRA is used.
63    
64    7. Constructs such as \d{8,} were compiling into the equivalent of
65    \d{8}\d{0,65527} instead of \d{8}\d* which didn't make much difference to the
66    outcome, but in this particular case used more store than had been allocated,
67    which caused the bug to be discovered because it threw up an internal error.
68    
69    8. The debugging code in both pcre and pcretest for outputting the compiled
70    form of a regex was going wrong in the case of back references followed by
71    curly-bracketed repeats.
72    
73    
74    Version 1.02 12-Dec-97
75    ----------------------
76    
77    1. Typos in pcre.3 and comments in the source fixed.
78    
79    2. Applied a contributed patch to get rid of places where it used to remove
80    'const' from variables, and fixed some signed/unsigned and uninitialized
81    variable warnings.
82    
83    3. Added the "runtest" target to Makefile.
84    
85    4. Set default compiler flag to -O2 rather than just -O.
86    
87    
88    Version 1.01 19-Nov-97
89    ----------------------
90    
91    1. PCRE was failing to diagnose unlimited repeat of empty string for patterns
92    like /([ab]*)*/, that is, for classes with more than one character in them.
93    
94    2. Likewise, it wasn't diagnosing patterns with "once-only" subpatterns, such
95    as /((?>a*))*/ (a PCRE_EXTRA facility).
96    
97    
98    Version 1.00 18-Nov-97
99    ----------------------
100    
101    1. Added compile-time macros to support systems such as SunOS4 which don't have
102    memmove() or strerror() but have other things that can be used instead.
103    
104    2. Arranged that "make clean" removes the executables.
105    
106    
107  Version 0.99 27-Oct-97  Version 0.99 27-Oct-97
108  ----------------------  ----------------------
109    

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