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revision 227 by ph10, Tue Aug 21 15:00:15 2007 UTC revision 270 by ph10, Fri Nov 16 19:55:16 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
4  Version 7.3 20-Aug-07  Version 7.5 12-Nov-07
5    ---------------------
7    1.  Applied a patch from Craig: "This patch makes it possible to 'ignore'
8        values in parens when parsing an RE using the C++ wrapper."
10    2.  Negative specials like \S did not work in character classes in UTF-8 mode.
11        Characters greater than 255 were excluded from the class instead of being
12        included.
14    3.  The same bug as (2) above applied to negated POSIX classes such as
15        [:^space:].
17    4.  PCRECPP_STATIC was referenced in pcrecpp_internal.h, but nowhere was it
18        defined or documented. It seems to have been a typo for PCRE_STATIC, so
19        I have changed it.
21    5.  The construct (?&) was not diagnosed as a syntax error (it referenced the
22        first named subpattern) and a construct such as (?&a) would reference the
23        first named subpattern whose name started with "a" (in other words, the
24        length check was missing).
26    6.  The erroneous patterns (?+-a) and (?-+a) give different error messages;
27        this is right because (?- can be followed by option settings as well as by
28        digits. I have, however, made the messages clearer.
30    7.  Patterns such as (?(1)a|b) (a pattern that contains fewer subpatterns
31        than the number used in the conditional) now cause a compile-time error.
32        This is actually not compatible with Perl, which accepts such patterns, but
33        treats the conditional as always being FALSE (as PCRE used to), but it
34        seems to me that giving a diagnostic is better.
37    Version 7.4 21-Sep-07
38    ---------------------
40    1.  Change 7.3/28 was implemented for classes by looking at the bitmap. This
41        means that a class such as [\s] counted as "explicit reference to CR or
42        LF". That isn't really right - the whole point of the change was to try to
43        help when there was an actual mention of one of the two characters. So now
44        the change happens only if \r or \n (or a literal CR or LF) character is
45        encountered.
47    2.  The 32-bit options word was also used for 6 internal flags, but the numbers
48        of both had grown to the point where there were only 3 bits left.
49        Fortunately, there was spare space in the data structure, and so I have
50        moved the internal flags into a new 16-bit field to free up more option
51        bits.
53    3.  The appearance of (?J) at the start of a pattern set the DUPNAMES option,
54        but did not set the internal JCHANGED flag - either of these is enough to
55        control the way the "get" function works - but the PCRE_INFO_JCHANGED
56        facility is supposed to tell if (?J) was ever used, so now (?J) at the
57        start sets both bits.
59    4.  Added options (at build time, compile time, exec time) to change \R from
60        matching any Unicode line ending sequence to just matching CR, LF, or CRLF.
62    5.  doc/pcresyntax.html was missing from the distribution.
64    6.  Put back the definition of PCRE_ERROR_NULLWSLIMIT, for backward
65        compatibility, even though it is no longer used.
67    7.  Added macro for snprintf to pcrecpp_unittest.cc and also for strtoll and
68        strtoull to pcrecpp.cc to select the available functions in WIN32 when the
69        windows.h file is present (where different names are used). [This was
70        reversed later after testing - see 16 below.]
72    8.  Changed all #include <config.h> to #include "config.h". There were also
73        some further <pcre.h> cases that I changed to "pcre.h".
75    9.  When pcregrep was used with the --colour option, it missed the line ending
76        sequence off the lines that it output.
78    10. It was pointed out to me that arrays of string pointers cause lots of
79        relocations when a shared library is dynamically loaded. A technique of
80        using a single long string with a table of offsets can drastically reduce
81        these. I have refactored PCRE in four places to do this. The result is
82        dramatic:
84          Originally:                          290
85          After changing UCP table:            187
86          After changing error message table:   43
87          After changing table of "verbs"       36
88          After changing table of Posix names   22
90        Thanks to the folks working on Gregex for glib for this insight.
92    11. --disable-stack-for-recursion caused compiling to fail unless -enable-
93        unicode-properties was also set.
95    12. Updated the tests so that they work when \R is defaulted to ANYCRLF.
97    13. Added checks for ANY and ANYCRLF to pcrecpp.cc where it previously
98        checked only for CRLF.
100    14. Added casts to pcretest.c to avoid compiler warnings.
102    15. Added Craig's patch to various pcrecpp modules to avoid compiler warnings.
104    16. Added Craig's patch to remove the WINDOWS_H tests, that were not working,
105        and instead check for _strtoi64 explicitly, and avoid the use of snprintf()
106        entirely. This removes changes made in 7 above.
108    17. The CMake files have been updated, and there is now more information about
109        building with CMake in the NON-UNIX-USE document.
112    Version 7.3 28-Aug-07
113  ---------------------  ---------------------
115   1. In the rejigging of the build system that eventually resulted in 7.1, the   1. In the rejigging of the build system that eventually resulted in 7.1, the

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