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revision 247 by ph10, Mon Sep 17 09:38:32 2007 UTC revision 332 by ph10, Sat Apr 5 16:11:05 2008 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
4  Version 7.4 10-Sep-07  Version 7.7 05-Mar-08
5    ---------------------
7    1.  Applied Craig's patch to sort out a long long problem: "If we can't convert
8        a string to a long long, pretend we don't even have a long long." This is
9        done by checking for the strtoq, strtoll, and _strtoi64 functions.
11    2.  Applied Craig's patch to pcrecpp.cc to restore ABI compatibility with
12        pre-7.6 versions, which defined a global no_arg variable instead of putting
13        it in the RE class. (See also #8 below.)
15    3.  Remove a line of dead code, identified by coverity and reported by Nuno
16        Lopes.
18    4.  Fixed two related pcregrep bugs involving -r with --include or --exclude:
20        (1) The include/exclude patterns were being applied to the whole pathnames
21            of files, instead of just to the final components.
23        (2) If there was more than one level of directory, the subdirectories were
24            skipped unless they satisfied the include/exclude conditions. This is
25            inconsistent with GNU grep (and could even be seen as contrary to the
26            pcregrep specification - which I improved to make it absolutely clear).
27            The action now is always to scan all levels of directory, and just
28            apply the include/exclude patterns to regular files.
30    5.  Added the --include_dir and --exclude_dir patterns to pcregrep, and used
31        --exclude_dir in the tests to avoid scanning .svn directories.
33    6.  Applied Craig's patch to the QuoteMeta function so that it escapes the
34        NUL character as backslash + 0 rather than backslash + NUL, because PCRE
35        doesn't support NULs in patterns.
37    7.  Added some missing "const"s to declarations of static tables in
38        pcre_compile.c and pcre_dfa_exec.c.
40    8.  Applied Craig's patch to pcrecpp.cc to fix a problem in OS X that was
41        caused by fix #2  above. (Subsequently also a second patch to fix the
42        first patch. And a third patch - this was a messy problem.)
44    9.  Applied Craig's patch to remove the use of push_back().
46    10. Applied Alan Lehotsky's patch to add REG_STARTEND support to the POSIX
47        matching function regexec().
50    Version 7.6 28-Jan-08
51    ---------------------
53    1.  A character class containing a very large number of characters with
54        codepoints greater than 255 (in UTF-8 mode, of course) caused a buffer
55        overflow.
57    2.  Patch to cut out the "long long" test in pcrecpp_unittest when
58        HAVE_LONG_LONG is not defined.
60    3.  Applied Christian Ehrlicher's patch to update the CMake build files to
61        bring them up to date and include new features. This patch includes:
63        - Fixed PH's badly added libz and libbz2 support.
64        - Fixed a problem with static linking.
65        - Added pcredemo. [But later removed - see 7 below.]
66        - Fixed dftables problem and added an option.
67        - Added a number of HAVE_XXX tests, including HAVE_WINDOWS_H and
68            HAVE_LONG_LONG.
69        - Added readline support for pcretest.
70        - Added an listing of the option settings after cmake has run.
72    4.  A user submitted a patch to Makefile that makes it easy to create
73        "pcre.dll" under mingw when using Configure/Make. I added stuff to
74        Makefile.am that cause it to include this special target, without
75        affecting anything else. Note that the same mingw target plus all
76        the other distribution libraries and programs are now supported
77        when configuring with CMake (see 6 below) instead of with
78        Configure/Make.
80    5.  Applied Craig's patch that moves no_arg into the RE class in the C++ code.
81        This is an attempt to solve the reported problem "pcrecpp::no_arg is not
82        exported in the Windows port". It has not yet been confirmed that the patch
83        solves the problem, but it does no harm.
85    6.  Applied Sheri's patch to CMakeLists.txt to add NON_STANDARD_LIB_PREFIX and
86        NON_STANDARD_LIB_SUFFIX for dll names built with mingw when configured
87        with CMake, and also correct the comment about stack recursion.
89    7.  Remove the automatic building of pcredemo from the ./configure system and
90        from CMakeLists.txt. The whole idea of pcredemo.c is that it is an example
91        of a program that users should build themselves after PCRE is installed, so
92        building it automatically is not really right. What is more, it gave
93        trouble in some build environments.
95    8.  Further tidies to CMakeLists.txt from Sheri and Christian.
98    Version 7.5 10-Jan-08
99    ---------------------
101    1.  Applied a patch from Craig: "This patch makes it possible to 'ignore'
102        values in parens when parsing an RE using the C++ wrapper."
104    2.  Negative specials like \S did not work in character classes in UTF-8 mode.
105        Characters greater than 255 were excluded from the class instead of being
106        included.
108    3.  The same bug as (2) above applied to negated POSIX classes such as
109        [:^space:].
111    4.  PCRECPP_STATIC was referenced in pcrecpp_internal.h, but nowhere was it
112        defined or documented. It seems to have been a typo for PCRE_STATIC, so
113        I have changed it.
115    5.  The construct (?&) was not diagnosed as a syntax error (it referenced the
116        first named subpattern) and a construct such as (?&a) would reference the
117        first named subpattern whose name started with "a" (in other words, the
118        length check was missing). Both these problems are fixed. "Subpattern name
119        expected" is now given for (?&) (a zero-length name), and this patch also
120        makes it give the same error for \k'' (previously it complained that that
121        was a reference to a non-existent subpattern).
123    6.  The erroneous patterns (?+-a) and (?-+a) give different error messages;
124        this is right because (?- can be followed by option settings as well as by
125        digits. I have, however, made the messages clearer.
127    7.  Patterns such as (?(1)a|b) (a pattern that contains fewer subpatterns
128        than the number used in the conditional) now cause a compile-time error.
129        This is actually not compatible with Perl, which accepts such patterns, but
130        treats the conditional as always being FALSE (as PCRE used to), but it
131        seems to me that giving a diagnostic is better.
133    8.  Change "alphameric" to the more common word "alphanumeric" in comments
134        and messages.
136    9.  Fix two occurrences of "backslash" in comments that should have been
137        "backspace".
139    10. Remove two redundant lines of code that can never be obeyed (their function
140        was moved elsewhere).
142    11. The program that makes PCRE's Unicode character property table had a bug
143        which caused it to generate incorrect table entries for sequences of
144        characters that have the same character type, but are in different scripts.
145        It amalgamated them into a single range, with the script of the first of
146        them. In other words, some characters were in the wrong script. There were
147        thirteen such cases, affecting characters in the following ranges:
149          U+002b0 - U+002c1
150          U+0060c - U+0060d
151          U+0061e - U+00612
152          U+0064b - U+0065e
153          U+0074d - U+0076d
154          U+01800 - U+01805
155          U+01d00 - U+01d77
156          U+01d9b - U+01dbf
157          U+0200b - U+0200f
158          U+030fc - U+030fe
159          U+03260 - U+0327f
160          U+0fb46 - U+0fbb1
161          U+10450 - U+1049d
163    12. The -o option (show only the matching part of a line) for pcregrep was not
164        compatible with GNU grep in that, if there was more than one match in a
165        line, it showed only the first of them. It now behaves in the same way as
166        GNU grep.
168    13. If the -o and -v options were combined for pcregrep, it printed a blank
169        line for every non-matching line. GNU grep prints nothing, and pcregrep now
170        does the same. The return code can be used to tell if there were any
171        non-matching lines.
173    14. Added --file-offsets and --line-offsets to pcregrep.
175    15. The pattern (?=something)(?R) was not being diagnosed as a potentially
176        infinitely looping recursion. The bug was that positive lookaheads were not
177        being skipped when checking for a possible empty match (negative lookaheads
178        and both kinds of lookbehind were skipped).
180    16. Fixed two typos in the Windows-only code in pcregrep.c, and moved the
181        inclusion of <windows.h> to before rather than after the definition of
182        INVALID_FILE_ATTRIBUTES (patch from David Byron).
184    17. Specifying a possessive quantifier with a specific limit for a Unicode
185        character property caused pcre_compile() to compile bad code, which led at
186        runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
187        are: /\p{Zl}{2,3}+/8 and /\p{Cc}{2}+/8. It was the possessive "+" that
188        caused the error; without that there was no problem.
190    18. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
192    19. Added --enable-pcretest-libreadline.
194    20. In pcrecpp.cc, the variable 'count' was incremented twice in
195        RE::GlobalReplace(). As a result, the number of replacements returned was
196        double what it should be. I removed one of the increments, but Craig sent a
197        later patch that removed the other one (the right fix) and added unit tests
198        that check the return values (which was not done before).
200    21. Several CMake things:
202        (1) Arranged that, when cmake is used on Unix, the libraries end up with
203            the names libpcre and libpcreposix, not just pcre and pcreposix.
205        (2) The above change means that pcretest and pcregrep are now correctly
206            linked with the newly-built libraries, not previously installed ones.
210    22. In UTF-8 mode, with newline set to "any", a pattern such as .*a.*=.b.*
211        crashed when matching a string such as a\x{2029}b (note that \x{2029} is a
212        UTF-8 newline character). The key issue is that the pattern starts .*;
213        this means that the match must be either at the beginning, or after a
214        newline. The bug was in the code for advancing after a failed match and
215        checking that the new position followed a newline. It was not taking
216        account of UTF-8 characters correctly.
218    23. PCRE was behaving differently from Perl in the way it recognized POSIX
219        character classes. PCRE was not treating the sequence [:...:] as a
220        character class unless the ... were all letters. Perl, however, seems to
221        allow any characters between [: and :], though of course it rejects as
222        unknown any "names" that contain non-letters, because all the known class
223        names consist only of letters. Thus, Perl gives an error for [[:1234:]],
224        for example, whereas PCRE did not - it did not recognize a POSIX character
225        class. This seemed a bit dangerous, so the code has been changed to be
226        closer to Perl. The behaviour is not identical to Perl, because PCRE will
227        diagnose an unknown class for, for example, [[:l\ower:]] where Perl will
228        treat it as [[:lower:]]. However, PCRE does now give "unknown" errors where
229        Perl does, and where it didn't before.
231    24. Rewrite so as to remove the single use of %n from pcregrep because in some
232        Windows environments %n is disabled by default.
235    Version 7.4 21-Sep-07
236  ---------------------  ---------------------
238  1.  Change 7.3/28 was implemented for classes by looking at the bitmap. This  1.  Change 7.3/28 was implemented for classes by looking at the bitmap. This
# Line 32  Version 7.4 10-Sep-07 Line 263  Version 7.4 10-Sep-07
263      compatibility, even though it is no longer used.      compatibility, even though it is no longer used.
265  7.  Added macro for snprintf to pcrecpp_unittest.cc and also for strtoll and  7.  Added macro for snprintf to pcrecpp_unittest.cc and also for strtoll and
266      strtoull to pcrecpp.cc to select the available functions in WIN32 (where      strtoull to pcrecpp.cc to select the available functions in WIN32 when the
267      different names are used).      windows.h file is present (where different names are used). [This was
268        reversed later after testing - see 16 below.]
270  8.  Changed all #include <config.h> to #include "config.h". There were also  8.  Changed all #include <config.h> to #include "config.h". There were also
271      some further <pcre.h> cases that I changed to "pcre.h".      some further <pcre.h> cases that I changed to "pcre.h".
# Line 58  Version 7.4 10-Sep-07 Line 290  Version 7.4 10-Sep-07
290  11. --disable-stack-for-recursion caused compiling to fail unless -enable-  11. --disable-stack-for-recursion caused compiling to fail unless -enable-
291      unicode-properties was also set.      unicode-properties was also set.
293  12. Updated the RunTest script to miss out tests that don't work if \R is  12. Updated the tests so that they work when \R is defaulted to ANYCRLF.
294      defaulted to ANYCRLF.  
295    13. Added checks for ANY and ANYCRLF to pcrecpp.cc where it previously
296        checked only for CRLF.
298    14. Added casts to pcretest.c to avoid compiler warnings.
300    15. Added Craig's patch to various pcrecpp modules to avoid compiler warnings.
302    16. Added Craig's patch to remove the WINDOWS_H tests, that were not working,
303        and instead check for _strtoi64 explicitly, and avoid the use of snprintf()
304        entirely. This removes changes made in 7 above.
306    17. The CMake files have been updated, and there is now more information about
307        building with CMake in the NON-UNIX-USE document.
310  Version 7.3 28-Aug-07  Version 7.3 28-Aug-07

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