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ChangeLog for PCRE |
ChangeLog for PCRE |
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Version 3.8 18-Dec-01 |
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--------------------- |
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1. The experimental UTF-8 code was completely screwed up. It was packing the |
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bytes in the wrong order. How dumb can you get? |
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Version 3.7 29-Oct-01 |
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--------------------- |
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1. In updating pcretest to check change 1 of version 3.6, I screwed up. |
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This caused pcretest, when used on the test data, to segfault. Unfortunately, |
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this didn't happen under Solaris 8, where I normally test things. |
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2. The Makefile had to be changed to make it work on BSD systems, where 'make' |
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doesn't seem to recognize that ./xxx and xxx are the same file. (This entry |
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isn't in ChangeLog distributed with 3.7 because I forgot when I hastily made |
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this fix an hour or so after the initial 3.7 release.) |
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Version 3.6 23-Oct-01 |
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--------------------- |
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1. Crashed with /(sens|respons)e and \1ibility/ and "sense and sensibility" if |
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offsets passed as NULL with zero offset count. |
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2. The config.guess and config.sub files had not been updated when I moved to |
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the latest autoconf. |
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Version 3.5 15-Aug-01 |
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--------------------- |
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1. Added some missing #if !defined NOPOSIX conditionals in pcretest.c that |
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had been forgotten. |
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2. By using declared but undefined structures, we can avoid using "void" |
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definitions in pcre.h while keeping the internal definitions of the structures |
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private. |
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3. The distribution is now built using autoconf 2.50 and libtool 1.4. From a |
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user point of view, this means that both static and shared libraries are built |
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by default, but this can be individually controlled. More of the work of |
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handling this static/shared cases is now inside libtool instead of PCRE's make |
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file. |
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4. The pcretest utility is now installed along with pcregrep because it is |
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useful for users (to test regexs) and by doing this, it automatically gets |
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relinked by libtool. The documentation has been turned into a man page, so |
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there are now .1, .txt, and .html versions in /doc. |
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5. Upgrades to pcregrep: |
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(i) Added long-form option names like gnu grep. |
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(ii) Added --help to list all options with an explanatory phrase. |
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(iii) Added -r, --recursive to recurse into sub-directories. |
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(iv) Added -f, --file to read patterns from a file. |
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6. pcre_exec() was referring to its "code" argument before testing that |
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argument for NULL (and giving an error if it was NULL). |
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7. Upgraded Makefile.in to allow for compiling in a different directory from |
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the source directory. |
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8. Tiny buglet in pcretest: when pcre_fullinfo() was called to retrieve the |
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options bits, the pointer it was passed was to an int instead of to an unsigned |
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long int. This mattered only on 64-bit systems. |
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9. Fixed typo (3.4/1) in pcre.h again. Sigh. I had changed pcre.h (which is |
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generated) instead of pcre.in, which it its source. Also made the same change |
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in several of the .c files. |
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10. A new release of gcc defines printf() as a macro, which broke pcretest |
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because it had an ifdef in the middle of a string argument for printf(). Fixed |
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by using separate calls to printf(). |
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11. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure |
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script, to force use of CR or LF instead of \n in the source. On non-Unix |
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systems, the value can be set in config.h. |
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12. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an |
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absolute limit. Changed the text of the error message to make this clear, and |
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likewise updated the man page. |
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13. The limit of 99 on the number of capturing subpatterns has been removed. |
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The new limit is 65535, which I hope will not be a "real" limit. |
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Version 3.4 22-Aug-00 |
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--------------------- |
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1. Fixed typo in pcre.h: unsigned const char * changed to const unsigned char *. |
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2. Diagnose condition (?(0) as an error instead of crashing on matching. |
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Version 3.3 01-Aug-00 |
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--------------------- |
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1. If an octal character was given, but the value was greater than \377, it |
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was not getting masked to the least significant bits, as documented. This could |
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lead to crashes in some systems. |
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2. Perl 5.6 (if not earlier versions) accepts classes like [a-\d] and treats |
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the hyphen as a literal. PCRE used to give an error; it now behaves like Perl. |
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3. Added the functions pcre_free_substring() and pcre_free_substring_list(). |
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These just pass their arguments on to (pcre_free)(), but they are provided |
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because some uses of PCRE bind it to non-C systems that can call its functions, |
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but cannot call free() or pcre_free() directly. |
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4. Add "make test" as a synonym for "make check". Corrected some comments in |
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the Makefile. |
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5. Add $(DESTDIR)/ in front of all the paths in the "install" target in the |
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Makefile. |
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6. Changed the name of pgrep to pcregrep, because Solaris has introduced a |
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command called pgrep for grepping around the active processes. |
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7. Added the beginnings of support for UTF-8 character strings. |
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8. Arranged for the Makefile to pass over the settings of CC, CFLAGS, and |
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RANLIB to ./ltconfig so that they are used by libtool. I think these are all |
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the relevant ones. (AR is not passed because ./ltconfig does its own figuring |
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out for the ar command.) |
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Version 3.2 12-May-00 |
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--------------------- |
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This is purely a bug fixing release. |
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1. If the pattern /((Z)+|A)*/ was matched agained ZABCDEFG it matched Z instead |
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of ZA. This was just one example of several cases that could provoke this bug, |
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which was introduced by change 9 of version 2.00. The code for breaking |
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infinite loops after an iteration that matches an empty string was't working |
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correctly. |
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2. The pcretest program was not imitating Perl correctly for the pattern /a*/g |
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when matched against abbab (for example). After matching an empty string, it |
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wasn't forcing anchoring when setting PCRE_NOTEMPTY for the next attempt; this |
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caused it to match further down the string than it should. |
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3. The code contained an inclusion of sys/types.h. It isn't clear why this |
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was there because it doesn't seem to be needed, and it causes trouble on some |
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systems, as it is not a Standard C header. It has been removed. |
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4. Made 4 silly changes to the source to avoid stupid compiler warnings that |
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were reported on the Macintosh. The changes were from |
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while ((c = *(++ptr)) != 0 && c != '\n'); |
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to |
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while ((c = *(++ptr)) != 0 && c != '\n') ; |
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Totally extraordinary, but if that's what it takes... |
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5. PCRE is being used in one environment where neither memmove() nor bcopy() is |
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available. Added HAVE_BCOPY and an autoconf test for it; if neither |
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HAVE_MEMMOVE nor HAVE_BCOPY is set, use a built-in emulation function which |
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assumes the way PCRE uses memmove() (always moving upwards). |
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6. PCRE is being used in one environment where strchr() is not available. There |
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was only one use in pcre.c, and writing it out to avoid strchr() probably gives |
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faster code anyway. |
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Version 3.1 09-Feb-00 |
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--------------------- |
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The only change in this release is the fixing of some bugs in Makefile.in for |
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the "install" target: |
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(1) It was failing to install pcreposix.h. |
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(2) It was overwriting the pcre.3 man page with the pcreposix.3 man page. |
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Version 3.0 01-Feb-00 |
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--------------------- |
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1. Add support for the /+ modifier to perltest (to output $` like it does in |
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pcretest). |
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2. Add support for the /g modifier to perltest. |
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3. Fix pcretest so that it behaves even more like Perl for /g when the pattern |
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matches null strings. |
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4. Fix perltest so that it doesn't do unwanted things when fed an empty |
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pattern. Perl treats empty patterns specially - it reuses the most recent |
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pattern, which is not what we want. Replace // by /(?#)/ in order to avoid this |
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effect. |
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5. The POSIX interface was broken in that it was just handing over the POSIX |
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captured string vector to pcre_exec(), but (since release 2.00) PCRE has |
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required a bigger vector, with some working space on the end. This means that |
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the POSIX wrapper now has to get and free some memory, and copy the results. |
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6. Added some simple autoconf support, placing the test data and the |
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documentation in separate directories, re-organizing some of the |
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information files, and making it build pcre-config (a GNU standard). Also added |
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libtool support for building PCRE as a shared library, which is now the |
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default. |
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7. Got rid of the leading zero in the definition of PCRE_MINOR because 08 and |
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09 are not valid octal constants. Single digits will be used for minor values |
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less than 10. |
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8. Defined REG_EXTENDED and REG_NOSUB as zero in the POSIX header, so that |
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existing programs that set these in the POSIX interface can use PCRE without |
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modification. |
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9. Added a new function, pcre_fullinfo() with an extensible interface. It can |
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return all that pcre_info() returns, plus additional data. The pcre_info() |
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function is retained for compatibility, but is considered to be obsolete. |
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10. Added experimental recursion feature (?R) to handle one common case that |
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Perl 5.6 will be able to do with (?p{...}). |
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11. Added support for POSIX character classes like [:alpha:], which Perl is |
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adopting. |
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Version 2.08 31-Aug-99 |
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---------------------- |
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1. When startoffset was not zero and the pattern began with ".*", PCRE was not |
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trying to match at the startoffset position, but instead was moving forward to |
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the next newline as if a previous match had failed. |
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2. pcretest was not making use of PCRE_NOTEMPTY when repeating for /g and /G, |
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and could get into a loop if a null string was matched other than at the start |
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of the subject. |
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3. Added definitions of PCRE_MAJOR and PCRE_MINOR to pcre.h so the version can |
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be distinguished at compile time, and for completeness also added PCRE_DATE. |
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5. Added Paul Sokolovsky's minor changes to make it easy to compile a Win32 DLL |
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in GnuWin32 environments. |
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Version 2.07 29-Jul-99 |
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---------------------- |
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1. The documentation is now supplied in plain text form and HTML as well as in |
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the form of man page sources. |
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2. C++ compilers don't like assigning (void *) values to other pointer types. |
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In particular this affects malloc(). Although there is no problem in Standard |
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C, I've put in casts to keep C++ compilers happy. |
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3. Typo on pcretest.c; a cast of (unsigned char *) in the POSIX regexec() call |
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should be (const char *). |
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4. If NOPOSIX is defined, pcretest.c compiles without POSIX support. This may |
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be useful for non-Unix systems who don't want to bother with the POSIX stuff. |
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However, I haven't made this a standard facility. The documentation doesn't |
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mention it, and the Makefile doesn't support it. |
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5. The Makefile now contains an "install" target, with editable destinations at |
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the top of the file. The pcretest program is not installed. |
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6. pgrep -V now gives the PCRE version number and date. |
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7. Fixed bug: a zero repetition after a literal string (e.g. /abcde{0}/) was |
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causing the entire string to be ignored, instead of just the last character. |
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8. If a pattern like /"([^\\"]+|\\.)*"/ is applied in the normal way to a |
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non-matching string, it can take a very, very long time, even for strings of |
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quite modest length, because of the nested recursion. PCRE now does better in |
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some of these cases. It does this by remembering the last required literal |
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character in the pattern, and pre-searching the subject to ensure it is present |
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before running the real match. In other words, it applies a heuristic to detect |
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some types of certain failure quickly, and in the above example, if presented |
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with a string that has no trailing " it gives "no match" very quickly. |
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9. A new runtime option PCRE_NOTEMPTY causes null string matches to be ignored; |
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other alternatives are tried instead. |
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Version 2.06 09-Jun-99 |
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---------------------- |
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1. Change pcretest's output for amount of store used to show just the code |
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space, because the remainder (the data block) varies in size between 32-bit and |
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64-bit systems. |
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2. Added an extra argument to pcre_exec() to supply an offset in the subject to |
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start matching at. This allows lookbehinds to work when searching for multiple |
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occurrences in a string. |
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3. Added additional options to pcretest for testing multiple occurrences: |
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/+ outputs the rest of the string that follows a match |
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/g loops for multiple occurrences, using the new startoffset argument |
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/G loops for multiple occurrences by passing an incremented pointer |
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4. PCRE wasn't doing the "first character" optimization for patterns starting |
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with \b or \B, though it was doing it for other lookbehind assertions. That is, |
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it wasn't noticing that a match for a pattern such as /\bxyz/ has to start with |
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the letter 'x'. On long subject strings, this gives a significant speed-up. |
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Version 2.05 21-Apr-99 |
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---------------------- |
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1. Changed the type of magic_number from int to long int so that it works |
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properly on 16-bit systems. |
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2. Fixed a bug which caused patterns starting with .* not to work correctly |
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when the subject string contained newline characters. PCRE was assuming |
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anchoring for such patterns in all cases, which is not correct because .* will |
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not pass a newline unless PCRE_DOTALL is set. It now assumes anchoring only if |
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DOTALL is set at top level; otherwise it knows that patterns starting with .* |
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must be retried after every newline in the subject. |
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Version 2.04 18-Feb-99 |
Version 2.04 18-Feb-99 |
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---------------------- |
---------------------- |
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