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revision 3 by nigel, Sat Feb 24 21:38:01 2007 UTC revision 17 by nigel, Sat Feb 24 21:38:29 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4    
5    Version 1.07 16-Feb-98
6    ----------------------
7    
8    1. A pattern such as /((a)*)*/ was not being diagnosed as in error (unlimited
9    repeat of a potentially empty string).
10    
11    
12    Version 1.06 23-Jan-98
13    ----------------------
14    
15    1. Added Markus Oberhumer's little patches for C++.
16    
17    2. Literal strings longer than 255 characters were broken.
18    
19    
20    Version 1.05 23-Dec-97
21    ----------------------
22    
23    1. Negated character classes containing more than one character were failing if
24    PCRE_CASELESS was set at run time.
25    
26    
27    Version 1.04 19-Dec-97
28    ----------------------
29    
30    1. Corrected the man page, where some "const" qualifiers had been omitted.
31    
32    2. Made debugging output print "{0,xxx}" instead of just "{,xxx}" to agree with
33    input syntax.
34    
35    3. Fixed memory leak which occurred when a regex with back references was
36    matched with an offsets vector that wasn't big enough. The temporary memory
37    that is used in this case wasn't being freed if the match failed.
38    
39    4. Tidied pcretest to ensure it frees memory that it gets.
40    
41    5. Temporary memory was being obtained in the case where the passed offsets
42    vector was exactly big enough.
43    
44    6. Corrected definition of offsetof() from change 5 below.
45    
46    7. I had screwed up change 6 below and broken the rules for the use of
47    setjmp(). Now fixed.
48    
49    
50    Version 1.03 18-Dec-97
51    ----------------------
52    
53    1. A erroneous regex with a missing opening parenthesis was correctly
54    diagnosed, but PCRE attempted to access brastack[-1], which could cause crashes
55    on some systems.
56    
57    2. Replaced offsetof(real_pcre, code) by offsetof(real_pcre, code[0]) because
58    it was reported that one broken compiler failed on the former because "code" is
59    also an independent variable.
60    
61    3. The erroneous regex a[]b caused an array overrun reference.
62    
63    4. A regex ending with a one-character negative class (e.g. /[^k]$/) did not
64    fail on data ending with that character. (It was going on too far, and checking
65    the next character, typically a binary zero.) This was specific to the
66    optimized code for single-character negative classes.
67    
68    5. Added a contributed patch from the TIN world which does the following:
69    
70      + Add an undef for memmove, in case the the system defines a macro for it.
71    
72      + Add a definition of offsetof(), in case there isn't one. (I don't know
73        the reason behind this - offsetof() is part of the ANSI standard - but
74        it does no harm).
75    
76      + Reduce the ifdef's in pcre.c using macro DPRINTF, thereby eliminating
77        most of the places where whitespace preceded '#'. I have given up and
78        allowed the remaining 2 cases to be at the margin.
79    
80      + Rename some variables in pcre to eliminate shadowing. This seems very
81        pedantic, but does no harm, of course.
82    
83    6. Moved the call to setjmp() into its own function, to get rid of warnings
84    from gcc -Wall, and avoided calling it at all unless PCRE_EXTRA is used.
85    
86    7. Constructs such as \d{8,} were compiling into the equivalent of
87    \d{8}\d{0,65527} instead of \d{8}\d* which didn't make much difference to the
88    outcome, but in this particular case used more store than had been allocated,
89    which caused the bug to be discovered because it threw up an internal error.
90    
91    8. The debugging code in both pcre and pcretest for outputting the compiled
92    form of a regex was going wrong in the case of back references followed by
93    curly-bracketed repeats.
94    
95    
96    Version 1.02 12-Dec-97
97    ----------------------
98    
99    1. Typos in pcre.3 and comments in the source fixed.
100    
101    2. Applied a contributed patch to get rid of places where it used to remove
102    'const' from variables, and fixed some signed/unsigned and uninitialized
103    variable warnings.
104    
105    3. Added the "runtest" target to Makefile.
106    
107    4. Set default compiler flag to -O2 rather than just -O.
108    
109    
110    Version 1.01 19-Nov-97
111    ----------------------
112    
113    1. PCRE was failing to diagnose unlimited repeat of empty string for patterns
114    like /([ab]*)*/, that is, for classes with more than one character in them.
115    
116    2. Likewise, it wasn't diagnosing patterns with "once-only" subpatterns, such
117    as /((?>a*))*/ (a PCRE_EXTRA facility).
118    
119    
120    Version 1.00 18-Nov-97
121    ----------------------
122    
123    1. Added compile-time macros to support systems such as SunOS4 which don't have
124    memmove() or strerror() but have other things that can be used instead.
125    
126    2. Arranged that "make clean" removes the executables.
127    
128    
129  Version 0.99 27-Oct-97  Version 0.99 27-Oct-97
130  ----------------------  ----------------------
131    

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