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revision 35 by nigel, Sat Feb 24 21:39:05 2007 UTC revision 49 by nigel, Sat Feb 24 21:39:33 2007 UTC
# Line 2  ChangeLog for PCRE Line 2  ChangeLog for PCRE
2  ------------------  ------------------
5    Version 3.3 01-Aug-00
6    ---------------------
8    1. If an octal character was given, but the value was greater than \377, it
9    was not getting masked to the least significant bits, as documented. This could
10    lead to crashes in some systems.
12    2. Perl 5.6 (if not earlier versions) accepts classes like [a-\d] and treats
13    the hyphen as a literal. PCRE used to give an error; it now behaves like Perl.
15    3. Added the functions pcre_free_substring() and pcre_free_substring_list().
16    These just pass their arguments on to (pcre_free)(), but they are provided
17    because some uses of PCRE bind it to non-C systems that can call its functions,
18    but cannot call free() or pcre_free() directly.
20    4. Add "make test" as a synonym for "make check". Corrected some comments in
21    the Makefile.
23    5. Add $(DESTDIR)/ in front of all the paths in the "install" target in the
24    Makefile.
26    6. Changed the name of pgrep to pcregrep, because Solaris has introduced a
27    command called pgrep for grepping around the active processes.
29    7. Added the beginnings of support for UTF-8 character strings.
31    8. Arranged for the Makefile to pass over the settings of CC, CFLAGS, and
32    RANLIB to ./ltconfig so that they are used by libtool. I think these are all
33    the relevant ones. (AR is not passed because ./ltconfig does its own figuring
34    out for the ar command.)
37    Version 3.2 12-May-00
38    ---------------------
40    This is purely a bug fixing release.
42    1. If the pattern /((Z)+|A)*/ was matched agained ZABCDEFG it matched Z instead
43    of ZA. This was just one example of several cases that could provoke this bug,
44    which was introduced by change 9 of version 2.00. The code for breaking
45    infinite loops after an iteration that matches an empty string was't working
46    correctly.
48    2. The pcretest program was not imitating Perl correctly for the pattern /a*/g
49    when matched against abbab (for example). After matching an empty string, it
50    wasn't forcing anchoring when setting PCRE_NOTEMPTY for the next attempt; this
51    caused it to match further down the string than it should.
53    3. The code contained an inclusion of sys/types.h. It isn't clear why this
54    was there because it doesn't seem to be needed, and it causes trouble on some
55    systems, as it is not a Standard C header. It has been removed.
57    4. Made 4 silly changes to the source to avoid stupid compiler warnings that
58    were reported on the Macintosh. The changes were from
60      while ((c = *(++ptr)) != 0 && c != '\n');
61    to
62      while ((c = *(++ptr)) != 0 && c != '\n') ;
64    Totally extraordinary, but if that's what it takes...
66    5. PCRE is being used in one environment where neither memmove() nor bcopy() is
67    available. Added HAVE_BCOPY and an autoconf test for it; if neither
68    HAVE_MEMMOVE nor HAVE_BCOPY is set, use a built-in emulation function which
69    assumes the way PCRE uses memmove() (always moving upwards).
71    6. PCRE is being used in one environment where strchr() is not available. There
72    was only one use in pcre.c, and writing it out to avoid strchr() probably gives
73    faster code anyway.
76    Version 3.1 09-Feb-00
77    ---------------------
79    The only change in this release is the fixing of some bugs in Makefile.in for
80    the "install" target:
82    (1) It was failing to install pcreposix.h.
84    (2) It was overwriting the pcre.3 man page with the pcreposix.3 man page.
87    Version 3.0 01-Feb-00
88    ---------------------
90    1. Add support for the /+ modifier to perltest (to output $` like it does in
91    pcretest).
93    2. Add support for the /g modifier to perltest.
95    3. Fix pcretest so that it behaves even more like Perl for /g when the pattern
96    matches null strings.
98    4. Fix perltest so that it doesn't do unwanted things when fed an empty
99    pattern. Perl treats empty patterns specially - it reuses the most recent
100    pattern, which is not what we want. Replace // by /(?#)/ in order to avoid this
101    effect.
103    5. The POSIX interface was broken in that it was just handing over the POSIX
104    captured string vector to pcre_exec(), but (since release 2.00) PCRE has
105    required a bigger vector, with some working space on the end. This means that
106    the POSIX wrapper now has to get and free some memory, and copy the results.
108    6. Added some simple autoconf support, placing the test data and the
109    documentation in separate directories, re-organizing some of the
110    information files, and making it build pcre-config (a GNU standard). Also added
111    libtool support for building PCRE as a shared library, which is now the
112    default.
114    7. Got rid of the leading zero in the definition of PCRE_MINOR because 08 and
115    09 are not valid octal constants. Single digits will be used for minor values
116    less than 10.
118    8. Defined REG_EXTENDED and REG_NOSUB as zero in the POSIX header, so that
119    existing programs that set these in the POSIX interface can use PCRE without
120    modification.
122    9. Added a new function, pcre_fullinfo() with an extensible interface. It can
123    return all that pcre_info() returns, plus additional data. The pcre_info()
124    function is retained for compatibility, but is considered to be obsolete.
126    10. Added experimental recursion feature (?R) to handle one common case that
127    Perl 5.6 will be able to do with (?p{...}).
129    11. Added support for POSIX character classes like [:alpha:], which Perl is
130    adopting.
133    Version 2.08 31-Aug-99
134    ----------------------
136    1. When startoffset was not zero and the pattern began with ".*", PCRE was not
137    trying to match at the startoffset position, but instead was moving forward to
138    the next newline as if a previous match had failed.
140    2. pcretest was not making use of PCRE_NOTEMPTY when repeating for /g and /G,
141    and could get into a loop if a null string was matched other than at the start
142    of the subject.
144    3. Added definitions of PCRE_MAJOR and PCRE_MINOR to pcre.h so the version can
145    be distinguished at compile time, and for completeness also added PCRE_DATE.
147    5. Added Paul Sokolovsky's minor changes to make it easy to compile a Win32 DLL
148    in GnuWin32 environments.
151    Version 2.07 29-Jul-99
152    ----------------------
154    1. The documentation is now supplied in plain text form and HTML as well as in
155    the form of man page sources.
157    2. C++ compilers don't like assigning (void *) values to other pointer types.
158    In particular this affects malloc(). Although there is no problem in Standard
159    C, I've put in casts to keep C++ compilers happy.
161    3. Typo on pcretest.c; a cast of (unsigned char *) in the POSIX regexec() call
162    should be (const char *).
164    4. If NOPOSIX is defined, pcretest.c compiles without POSIX support. This may
165    be useful for non-Unix systems who don't want to bother with the POSIX stuff.
166    However, I haven't made this a standard facility. The documentation doesn't
167    mention it, and the Makefile doesn't support it.
169    5. The Makefile now contains an "install" target, with editable destinations at
170    the top of the file. The pcretest program is not installed.
172    6. pgrep -V now gives the PCRE version number and date.
174    7. Fixed bug: a zero repetition after a literal string (e.g. /abcde{0}/) was
175    causing the entire string to be ignored, instead of just the last character.
177    8. If a pattern like /"([^\\"]+|\\.)*"/ is applied in the normal way to a
178    non-matching string, it can take a very, very long time, even for strings of
179    quite modest length, because of the nested recursion. PCRE now does better in
180    some of these cases. It does this by remembering the last required literal
181    character in the pattern, and pre-searching the subject to ensure it is present
182    before running the real match. In other words, it applies a heuristic to detect
183    some types of certain failure quickly, and in the above example, if presented
184    with a string that has no trailing " it gives "no match" very quickly.
186    9. A new runtime option PCRE_NOTEMPTY causes null string matches to be ignored;
187    other alternatives are tried instead.
190  Version 2.06 09-Jun-99  Version 2.06 09-Jun-99
191  ----------------------  ----------------------

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