7 1. A bit of extraneous text had somehow crept into the pcregrep documentation.
9 2. If --disable-static was given, the building process failed when trying to
10 build pcretest and pcregrep. (For some reason it was using libtool to compile
11 them, which is not right, as they aren't part of the library.)
17 1. The experimental UTF-8 code was completely screwed up. It was packing the
18 bytes in the wrong order. How dumb can you get?
24 1. In updating pcretest to check change 1 of version 3.6, I screwed up.
25 This caused pcretest, when used on the test data, to segfault. Unfortunately,
26 this didn't happen under Solaris 8, where I normally test things.
28 2. The Makefile had to be changed to make it work on BSD systems, where 'make'
29 doesn't seem to recognize that ./xxx and xxx are the same file. (This entry
30 isn't in ChangeLog distributed with 3.7 because I forgot when I hastily made
31 this fix an hour or so after the initial 3.7 release.)
37 1. Crashed with /(sens|respons)e and \1ibility/ and "sense and sensibility" if
38 offsets passed as NULL with zero offset count.
40 2. The config.guess and config.sub files had not been updated when I moved to
47 1. Added some missing #if !defined NOPOSIX conditionals in pcretest.c that
50 2. By using declared but undefined structures, we can avoid using "void"
51 definitions in pcre.h while keeping the internal definitions of the structures
54 3. The distribution is now built using autoconf 2.50 and libtool 1.4. From a
55 user point of view, this means that both static and shared libraries are built
56 by default, but this can be individually controlled. More of the work of
57 handling this static/shared cases is now inside libtool instead of PCRE's make
60 4. The pcretest utility is now installed along with pcregrep because it is
61 useful for users (to test regexs) and by doing this, it automatically gets
62 relinked by libtool. The documentation has been turned into a man page, so
63 there are now .1, .txt, and .html versions in /doc.
65 5. Upgrades to pcregrep:
66 (i) Added long-form option names like gnu grep.
67 (ii) Added --help to list all options with an explanatory phrase.
68 (iii) Added -r, --recursive to recurse into sub-directories.
69 (iv) Added -f, --file to read patterns from a file.
71 6. pcre_exec() was referring to its "code" argument before testing that
72 argument for NULL (and giving an error if it was NULL).
74 7. Upgraded Makefile.in to allow for compiling in a different directory from
77 8. Tiny buglet in pcretest: when pcre_fullinfo() was called to retrieve the
78 options bits, the pointer it was passed was to an int instead of to an unsigned
79 long int. This mattered only on 64-bit systems.
81 9. Fixed typo (3.4/1) in pcre.h again. Sigh. I had changed pcre.h (which is
82 generated) instead of pcre.in, which it its source. Also made the same change
83 in several of the .c files.
85 10. A new release of gcc defines printf() as a macro, which broke pcretest
86 because it had an ifdef in the middle of a string argument for printf(). Fixed
87 by using separate calls to printf().
89 11. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure
90 script, to force use of CR or LF instead of \n in the source. On non-Unix
91 systems, the value can be set in config.h.
93 12. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an
94 absolute limit. Changed the text of the error message to make this clear, and
95 likewise updated the man page.
97 13. The limit of 99 on the number of capturing subpatterns has been removed.
98 The new limit is 65535, which I hope will not be a "real" limit.
101 Version 3.4 22-Aug-00
102 ---------------------
104 1. Fixed typo in pcre.h: unsigned const char * changed to const unsigned char *.
106 2. Diagnose condition (?(0) as an error instead of crashing on matching.
109 Version 3.3 01-Aug-00
110 ---------------------
112 1. If an octal character was given, but the value was greater than \377, it
113 was not getting masked to the least significant bits, as documented. This could
114 lead to crashes in some systems.
116 2. Perl 5.6 (if not earlier versions) accepts classes like [a-\d] and treats
117 the hyphen as a literal. PCRE used to give an error; it now behaves like Perl.
119 3. Added the functions pcre_free_substring() and pcre_free_substring_list().
120 These just pass their arguments on to (pcre_free)(), but they are provided
121 because some uses of PCRE bind it to non-C systems that can call its functions,
122 but cannot call free() or pcre_free() directly.
124 4. Add "make test" as a synonym for "make check". Corrected some comments in
127 5. Add $(DESTDIR)/ in front of all the paths in the "install" target in the
130 6. Changed the name of pgrep to pcregrep, because Solaris has introduced a
131 command called pgrep for grepping around the active processes.
133 7. Added the beginnings of support for UTF-8 character strings.
135 8. Arranged for the Makefile to pass over the settings of CC, CFLAGS, and
136 RANLIB to ./ltconfig so that they are used by libtool. I think these are all
137 the relevant ones. (AR is not passed because ./ltconfig does its own figuring
138 out for the ar command.)
141 Version 3.2 12-May-00
142 ---------------------
144 This is purely a bug fixing release.
146 1. If the pattern /((Z)+|A)*/ was matched agained ZABCDEFG it matched Z instead
147 of ZA. This was just one example of several cases that could provoke this bug,
148 which was introduced by change 9 of version 2.00. The code for breaking
149 infinite loops after an iteration that matches an empty string was't working
152 2. The pcretest program was not imitating Perl correctly for the pattern /a*/g
153 when matched against abbab (for example). After matching an empty string, it
154 wasn't forcing anchoring when setting PCRE_NOTEMPTY for the next attempt; this
155 caused it to match further down the string than it should.
157 3. The code contained an inclusion of sys/types.h. It isn't clear why this
158 was there because it doesn't seem to be needed, and it causes trouble on some
159 systems, as it is not a Standard C header. It has been removed.
161 4. Made 4 silly changes to the source to avoid stupid compiler warnings that
162 were reported on the Macintosh. The changes were from
164 while ((c = *(++ptr)) != 0 && c != '\n');
166 while ((c = *(++ptr)) != 0 && c != '\n') ;
168 Totally extraordinary, but if that's what it takes...
170 5. PCRE is being used in one environment where neither memmove() nor bcopy() is
171 available. Added HAVE_BCOPY and an autoconf test for it; if neither
172 HAVE_MEMMOVE nor HAVE_BCOPY is set, use a built-in emulation function which
173 assumes the way PCRE uses memmove() (always moving upwards).
175 6. PCRE is being used in one environment where strchr() is not available. There
176 was only one use in pcre.c, and writing it out to avoid strchr() probably gives
180 Version 3.2 12-May-00
181 ---------------------
183 This is purely a bug fixing release.
185 1. If the pattern /((Z)+|A)*/ was matched agained ZABCDEFG it matched Z instead
186 of ZA. This was just one example of several cases that could provoke this bug,
187 which was introduced by change 9 of version 2.00. The code for breaking
188 infinite loops after an iteration that matches an empty string was't working
191 2. The pcretest program was not imitating Perl correctly for the pattern /a*/g
192 when matched against abbab (for example). After matching an empty string, it
193 wasn't forcing anchoring when setting PCRE_NOTEMPTY for the next attempt; this
194 caused it to match further down the string than it should.
196 3. The code contained an inclusion of sys/types.h. It isn't clear why this
197 was there because it doesn't seem to be needed, and it causes trouble on some
198 systems, as it is not a Standard C header. It has been removed.
200 4. Made 4 silly changes to the source to avoid stupid compiler warnings that
201 were reported on the Macintosh. The changes were from
203 while ((c = *(++ptr)) != 0 && c != '\n');
205 while ((c = *(++ptr)) != 0 && c != '\n') ;
207 Totally extraordinary, but if that's what it takes...
209 5. PCRE is being used in one environment where neither memmove() nor bcopy() is
210 available. Added HAVE_BCOPY and an autoconf test for it; if neither
211 HAVE_MEMMOVE nor HAVE_BCOPY is set, use a built-in emulation function which
212 assumes the way PCRE uses memmove() (always moving upwards).
214 6. PCRE is being used in one environment where strchr() is not available. There
215 was only one use in pcre.c, and writing it out to avoid strchr() probably gives
219 Version 3.1 09-Feb-00
220 ---------------------
222 The only change in this release is the fixing of some bugs in Makefile.in for
223 the "install" target:
225 (1) It was failing to install pcreposix.h.
227 (2) It was overwriting the pcre.3 man page with the pcreposix.3 man page.
230 Version 3.0 01-Feb-00
231 ---------------------
233 1. Add support for the /+ modifier to perltest (to output $` like it does in
236 2. Add support for the /g modifier to perltest.
238 3. Fix pcretest so that it behaves even more like Perl for /g when the pattern
239 matches null strings.
241 4. Fix perltest so that it doesn't do unwanted things when fed an empty
242 pattern. Perl treats empty patterns specially - it reuses the most recent
243 pattern, which is not what we want. Replace // by /(?#)/ in order to avoid this
246 5. The POSIX interface was broken in that it was just handing over the POSIX
247 captured string vector to pcre_exec(), but (since release 2.00) PCRE has
248 required a bigger vector, with some working space on the end. This means that
249 the POSIX wrapper now has to get and free some memory, and copy the results.
251 6. Added some simple autoconf support, placing the test data and the
252 documentation in separate directories, re-organizing some of the
253 information files, and making it build pcre-config (a GNU standard). Also added
254 libtool support for building PCRE as a shared library, which is now the
257 7. Got rid of the leading zero in the definition of PCRE_MINOR because 08 and
258 09 are not valid octal constants. Single digits will be used for minor values
261 8. Defined REG_EXTENDED and REG_NOSUB as zero in the POSIX header, so that
262 existing programs that set these in the POSIX interface can use PCRE without
265 9. Added a new function, pcre_fullinfo() with an extensible interface. It can
266 return all that pcre_info() returns, plus additional data. The pcre_info()
267 function is retained for compatibility, but is considered to be obsolete.
269 10. Added experimental recursion feature (?R) to handle one common case that
270 Perl 5.6 will be able to do with (?p{...}).
272 11. Added support for POSIX character classes like [:alpha:], which Perl is
276 Version 2.08 31-Aug-99
277 ----------------------
279 1. When startoffset was not zero and the pattern began with ".*", PCRE was not
280 trying to match at the startoffset position, but instead was moving forward to
281 the next newline as if a previous match had failed.
283 2. pcretest was not making use of PCRE_NOTEMPTY when repeating for /g and /G,
284 and could get into a loop if a null string was matched other than at the start
287 3. Added definitions of PCRE_MAJOR and PCRE_MINOR to pcre.h so the version can
288 be distinguished at compile time, and for completeness also added PCRE_DATE.
290 5. Added Paul Sokolovsky's minor changes to make it easy to compile a Win32 DLL
291 in GnuWin32 environments.
294 Version 2.07 29-Jul-99
295 ----------------------
297 1. The documentation is now supplied in plain text form and HTML as well as in
298 the form of man page sources.
300 2. C++ compilers don't like assigning (void *) values to other pointer types.
301 In particular this affects malloc(). Although there is no problem in Standard
302 C, I've put in casts to keep C++ compilers happy.
304 3. Typo on pcretest.c; a cast of (unsigned char *) in the POSIX regexec() call
305 should be (const char *).
307 4. If NOPOSIX is defined, pcretest.c compiles without POSIX support. This may
308 be useful for non-Unix systems who don't want to bother with the POSIX stuff.
309 However, I haven't made this a standard facility. The documentation doesn't
310 mention it, and the Makefile doesn't support it.
312 5. The Makefile now contains an "install" target, with editable destinations at
313 the top of the file. The pcretest program is not installed.
315 6. pgrep -V now gives the PCRE version number and date.
317 7. Fixed bug: a zero repetition after a literal string (e.g. /abcde{0}/) was
318 causing the entire string to be ignored, instead of just the last character.
320 8. If a pattern like /"([^\\"]+|\\.)*"/ is applied in the normal way to a
321 non-matching string, it can take a very, very long time, even for strings of
322 quite modest length, because of the nested recursion. PCRE now does better in
323 some of these cases. It does this by remembering the last required literal
324 character in the pattern, and pre-searching the subject to ensure it is present
325 before running the real match. In other words, it applies a heuristic to detect
326 some types of certain failure quickly, and in the above example, if presented
327 with a string that has no trailing " it gives "no match" very quickly.
329 9. A new runtime option PCRE_NOTEMPTY causes null string matches to be ignored;
330 other alternatives are tried instead.
333 Version 2.06 09-Jun-99
334 ----------------------
336 1. Change pcretest's output for amount of store used to show just the code
337 space, because the remainder (the data block) varies in size between 32-bit and
340 2. Added an extra argument to pcre_exec() to supply an offset in the subject to
341 start matching at. This allows lookbehinds to work when searching for multiple
342 occurrences in a string.
344 3. Added additional options to pcretest for testing multiple occurrences:
346 /+ outputs the rest of the string that follows a match
347 /g loops for multiple occurrences, using the new startoffset argument
348 /G loops for multiple occurrences by passing an incremented pointer
350 4. PCRE wasn't doing the "first character" optimization for patterns starting
351 with \b or \B, though it was doing it for other lookbehind assertions. That is,
352 it wasn't noticing that a match for a pattern such as /\bxyz/ has to start with
353 the letter 'x'. On long subject strings, this gives a significant speed-up.
356 Version 2.05 21-Apr-99
357 ----------------------
359 1. Changed the type of magic_number from int to long int so that it works
360 properly on 16-bit systems.
362 2. Fixed a bug which caused patterns starting with .* not to work correctly
363 when the subject string contained newline characters. PCRE was assuming
364 anchoring for such patterns in all cases, which is not correct because .* will
365 not pass a newline unless PCRE_DOTALL is set. It now assumes anchoring only if
366 DOTALL is set at top level; otherwise it knows that patterns starting with .*
367 must be retried after every newline in the subject.
370 Version 2.04 18-Feb-99
371 ----------------------
373 1. For parenthesized subpatterns with repeats whose minimum was zero, the
374 computation of the store needed to hold the pattern was incorrect (too large).
375 If such patterns were nested a few deep, this could multiply and become a real
378 2. Added /M option to pcretest to show the memory requirement of a specific
379 pattern. Made -m a synonym of -s (which does this globally) for compatibility.
381 3. Subpatterns of the form (regex){n,m} (i.e. limited maximum) were being
382 compiled in such a way that the backtracking after subsequent failure was
383 pessimal. Something like (a){0,3} was compiled as (a)?(a)?(a)? instead of
384 ((a)((a)(a)?)?)? with disastrous performance if the maximum was of any size.
387 Version 2.03 02-Feb-99
388 ----------------------
390 1. Fixed typo and small mistake in man page.
392 2. Added 4th condition (GPL supersedes if conflict) and created separate
393 LICENCE file containing the conditions.
395 3. Updated pcretest so that patterns such as /abc\/def/ work like they do in
396 Perl, that is the internal \ allows the delimiter to be included in the
397 pattern. Locked out the use of \ as a delimiter. If \ immediately follows
398 the final delimiter, add \ to the end of the pattern (to test the error).
400 4. Added the convenience functions for extracting substrings after a successful
401 match. Updated pcretest to make it able to test these functions.
404 Version 2.02 14-Jan-99
405 ----------------------
407 1. Initialized the working variables associated with each extraction so that
408 their saving and restoring doesn't refer to uninitialized store.
410 2. Put dummy code into study.c in order to trick the optimizer of the IBM C
411 compiler for OS/2 into generating correct code. Apparently IBM isn't going to
414 3. Pcretest: the timing code wasn't using LOOPREPEAT for timing execution
415 calls, and wasn't printing the correct value for compiling calls. Increased the
416 default value of LOOPREPEAT, and the number of significant figures in the
419 4. Changed "/bin/rm" in the Makefile to "-rm" so it works on Windows NT.
421 5. Renamed "deftables" as "dftables" to get it down to 8 characters, to avoid
422 a building problem on Windows NT with a FAT file system.
425 Version 2.01 21-Oct-98
426 ----------------------
428 1. Changed the API for pcre_compile() to allow for the provision of a pointer
429 to character tables built by pcre_maketables() in the current locale. If NULL
430 is passed, the default tables are used.
433 Version 2.00 24-Sep-98
434 ----------------------
436 1. Since the (>?) facility is in Perl 5.005, don't require PCRE_EXTRA to enable
439 2. Allow quantification of (?>) groups, and make it work correctly.
441 3. The first character computation wasn't working for (?>) groups.
443 4. Correct the implementation of \Z (it is permitted to match on the \n at the
444 end of the subject) and add 5.005's \z, which really does match only at the
445 very end of the subject.
447 5. Remove the \X "cut" facility; Perl doesn't have it, and (?> is neater.
449 6. Remove the ability to specify CASELESS, MULTILINE, DOTALL, and
450 DOLLAR_END_ONLY at runtime, to make it possible to implement the Perl 5.005
451 localized options. All options to pcre_study() were also removed.
453 7. Add other new features from 5.005:
455 $(?<= positive lookbehind
456 $(?<! negative lookbehind
457 (?imsx-imsx) added the unsetting capability
458 such a setting is global if at outer level; local otherwise
459 (?imsx-imsx:) non-capturing groups with option setting
460 (?(cond)re|re) conditional pattern matching
462 A backreference to itself in a repeated group matches the previous
465 8. General tidying up of studying (both automatic and via "study")
466 consequential on the addition of new assertions.
468 9. As in 5.005, unlimited repeated groups that could match an empty substring
469 are no longer faulted at compile time. Instead, the loop is forcibly broken at
470 runtime if any iteration does actually match an empty substring.
472 10. Include the RunTest script in the distribution.
474 11. Added tests from the Perl 5.005_02 distribution. This showed up a few
475 discrepancies, some of which were old and were also with respect to 5.004. They
479 Version 1.09 28-Apr-98
480 ----------------------
482 1. A negated single character class followed by a quantifier with a minimum
483 value of one (e.g. [^x]{1,6} ) was not compiled correctly. This could lead to
484 program crashes, or just wrong answers. This did not apply to negated classes
485 containing more than one character, or to minima other than one.
488 Version 1.08 27-Mar-98
489 ----------------------
491 1. Add PCRE_UNGREEDY to invert the greediness of quantifiers.
493 2. Add (?U) and (?X) to set PCRE_UNGREEDY and PCRE_EXTRA respectively. The
494 latter must appear before anything that relies on it in the pattern.
497 Version 1.07 16-Feb-98
498 ----------------------
500 1. A pattern such as /((a)*)*/ was not being diagnosed as in error (unlimited
501 repeat of a potentially empty string).
504 Version 1.06 23-Jan-98
505 ----------------------
507 1. Added Markus Oberhumer's little patches for C++.
509 2. Literal strings longer than 255 characters were broken.
512 Version 1.05 23-Dec-97
513 ----------------------
515 1. Negated character classes containing more than one character were failing if
516 PCRE_CASELESS was set at run time.
519 Version 1.04 19-Dec-97
520 ----------------------
522 1. Corrected the man page, where some "const" qualifiers had been omitted.
524 2. Made debugging output print "{0,xxx}" instead of just "{,xxx}" to agree with
527 3. Fixed memory leak which occurred when a regex with back references was
528 matched with an offsets vector that wasn't big enough. The temporary memory
529 that is used in this case wasn't being freed if the match failed.
531 4. Tidied pcretest to ensure it frees memory that it gets.
533 5. Temporary memory was being obtained in the case where the passed offsets
534 vector was exactly big enough.
536 6. Corrected definition of offsetof() from change 5 below.
538 7. I had screwed up change 6 below and broken the rules for the use of
542 Version 1.03 18-Dec-97
543 ----------------------
545 1. A erroneous regex with a missing opening parenthesis was correctly
546 diagnosed, but PCRE attempted to access brastack[-1], which could cause crashes
549 2. Replaced offsetof(real_pcre, code) by offsetof(real_pcre, code[0]) because
550 it was reported that one broken compiler failed on the former because "code" is
551 also an independent variable.
553 3. The erroneous regex a[]b caused an array overrun reference.
555 4. A regex ending with a one-character negative class (e.g. /[^k]$/) did not
556 fail on data ending with that character. (It was going on too far, and checking
557 the next character, typically a binary zero.) This was specific to the
558 optimized code for single-character negative classes.
560 5. Added a contributed patch from the TIN world which does the following:
562 + Add an undef for memmove, in case the the system defines a macro for it.
564 + Add a definition of offsetof(), in case there isn't one. (I don't know
565 the reason behind this - offsetof() is part of the ANSI standard - but
568 + Reduce the ifdef's in pcre.c using macro DPRINTF, thereby eliminating
569 most of the places where whitespace preceded '#'. I have given up and
570 allowed the remaining 2 cases to be at the margin.
572 + Rename some variables in pcre to eliminate shadowing. This seems very
573 pedantic, but does no harm, of course.
575 6. Moved the call to setjmp() into its own function, to get rid of warnings
576 from gcc -Wall, and avoided calling it at all unless PCRE_EXTRA is used.
578 7. Constructs such as \d{8,} were compiling into the equivalent of
579 \d{8}\d{0,65527} instead of \d{8}\d* which didn't make much difference to the
580 outcome, but in this particular case used more store than had been allocated,
581 which caused the bug to be discovered because it threw up an internal error.
583 8. The debugging code in both pcre and pcretest for outputting the compiled
584 form of a regex was going wrong in the case of back references followed by
585 curly-bracketed repeats.
588 Version 1.02 12-Dec-97
589 ----------------------
591 1. Typos in pcre.3 and comments in the source fixed.
593 2. Applied a contributed patch to get rid of places where it used to remove
594 'const' from variables, and fixed some signed/unsigned and uninitialized
597 3. Added the "runtest" target to Makefile.
599 4. Set default compiler flag to -O2 rather than just -O.
602 Version 1.01 19-Nov-97
603 ----------------------
605 1. PCRE was failing to diagnose unlimited repeat of empty string for patterns
606 like /([ab]*)*/, that is, for classes with more than one character in them.
608 2. Likewise, it wasn't diagnosing patterns with "once-only" subpatterns, such
609 as /((?>a*))*/ (a PCRE_EXTRA facility).
612 Version 1.00 18-Nov-97
613 ----------------------
615 1. Added compile-time macros to support systems such as SunOS4 which don't have
616 memmove() or strerror() but have other things that can be used instead.
618 2. Arranged that "make clean" removes the executables.
621 Version 0.99 27-Oct-97
622 ----------------------
624 1. Fixed bug in code for optimizing classes with only one character. It was
625 initializing a 32-byte map regardless, which could cause it to run off the end
626 of the memory it had got.
628 2. Added, conditional on PCRE_EXTRA, the proposed (?>REGEX) construction.
631 Version 0.98 22-Oct-97
632 ----------------------
634 1. Fixed bug in code for handling temporary memory usage when there are more
635 back references than supplied space in the ovector. This could cause segfaults.
638 Version 0.97 21-Oct-97
639 ----------------------
641 1. Added the \X "cut" facility, conditional on PCRE_EXTRA.
643 2. Optimized negated single characters not to use a bit map.
645 3. Brought error texts together as macro definitions; clarified some of them;
646 fixed one that was wrong - it said "range out of order" when it meant "invalid
649 4. Changed some char * arguments to const char *.
651 5. Added PCRE_NOTBOL and PCRE_NOTEOL (from POSIX).
653 6. Added the POSIX-style API wrapper in pcreposix.a and testing facilities in
657 Version 0.96 16-Oct-97
658 ----------------------
660 1. Added a simple "pgrep" utility to the distribution.
662 2. Fixed an incompatibility with Perl: "{" is now treated as a normal character
663 unless it appears in one of the precise forms "{ddd}", "{ddd,}", or "{ddd,ddd}"
664 where "ddd" means "one or more decimal digits".
666 3. Fixed serious bug. If a pattern had a back reference, but the call to
667 pcre_exec() didn't supply a large enough ovector to record the related
668 identifying subpattern, the match always failed. PCRE now remembers the number
669 of the largest back reference, and gets some temporary memory in which to save
670 the offsets during matching if necessary, in order to ensure that
671 backreferences always work.
673 4. Increased the compatibility with Perl in a number of ways:
675 (a) . no longer matches \n by default; an option PCRE_DOTALL is provided
676 to request this handling. The option can be set at compile or exec time.
678 (b) $ matches before a terminating newline by default; an option
679 PCRE_DOLLAR_ENDONLY is provided to override this (but not in multiline
680 mode). The option can be set at compile or exec time.
682 (c) The handling of \ followed by a digit other than 0 is now supposed to be
683 the same as Perl's. If the decimal number it represents is less than 10
684 or there aren't that many previous left capturing parentheses, an octal
685 escape is read. Inside a character class, it's always an octal escape,
686 even if it is a single digit.
688 (d) An escaped but undefined alphabetic character is taken as a literal,
689 unless PCRE_EXTRA is set. Currently this just reserves the remaining
692 (e) {0} is now permitted. (The previous item is removed from the compiled
695 5. Changed all the names of code files so that the basic parts are no longer
696 than 10 characters, and abolished the teeny "globals.c" file.
698 6. Changed the handling of character classes; they are now done with a 32-byte
701 7. Added the -d and /D options to pcretest to make it possible to look at the
702 internals of compilation without having to recompile pcre.
705 Version 0.95 23-Sep-97
706 ----------------------
708 1. Fixed bug in pre-pass concerning escaped "normal" characters such as \x5c or
709 \x20 at the start of a run of normal characters. These were being treated as
710 real characters, instead of the source characters being re-checked.
713 Version 0.94 18-Sep-97
714 ----------------------
716 1. The functions are now thread-safe, with the caveat that the global variables
717 containing pointers to malloc() and free() or alternative functions are the
718 same for all threads.
720 2. Get pcre_study() to generate a bitmap of initial characters for non-
721 anchored patterns when this is possible, and use it if passed to pcre_exec().
724 Version 0.93 15-Sep-97
725 ----------------------
727 1. /(b)|(:+)/ was computing an incorrect first character.
729 2. Add pcre_study() to the API and the passing of pcre_extra to pcre_exec(),
730 but not actually doing anything yet.
732 3. Treat "-" characters in classes that cannot be part of ranges as literals,
733 as Perl does (e.g. [-az] or [az-]).
735 4. Set the anchored flag if a branch starts with .* or .*? because that tests
736 all possible positions.
738 5. Split up into different modules to avoid including unneeded functions in a
739 compiled binary. However, compile and exec are still in one module. The "study"
740 function is split off.
742 6. The character tables are now in a separate module whose source is generated
743 by an auxiliary program - but can then be edited by hand if required. There are
744 now no calls to isalnum(), isspace(), isdigit(), isxdigit(), tolower() or
745 toupper() in the code.
747 7. Turn the malloc/free funtions variables into pcre_malloc and pcre_free and
748 make them global. Abolish the function for setting them, as the caller can now
752 Version 0.92 11-Sep-97
753 ----------------------
755 1. A repeat with a fixed maximum and a minimum of 1 for an ordinary character
756 (e.g. /a{1,3}/) was broken (I mis-optimized it).
758 2. Caseless matching was not working in character classes if the characters in
759 the pattern were in upper case.
761 3. Make ranges like [W-c] work in the same way as Perl for caseless matching.
763 4. Make PCRE_ANCHORED public and accept as a compile option.
765 5. Add an options word to pcre_exec() and accept PCRE_ANCHORED and
766 PCRE_CASELESS at run time. Add escapes \A and \I to pcretest to cause it to
769 6. Give an error if bad option bits passed at compile or run time.
771 7. Add PCRE_MULTILINE at compile and exec time, and (?m) as well. Add \M to
772 pcretest to cause it to pass that flag.
774 8. Add pcre_info(), to get the number of identifying subpatterns, the stored
775 options, and the first character, if set.
777 9. Recognize C+ or C{n,m} where n >= 1 as providing a fixed starting character.
780 Version 0.91 10-Sep-97
781 ----------------------
783 1. PCRE was failing to diagnose unlimited repeats of subpatterns that could
784 match the empty string as in /(a*)*/. It was looping and ultimately crashing.
786 2. PCRE was looping on encountering an indefinitely repeated back reference to
787 a subpattern that had matched an empty string, e.g. /(a|)\1*/. It now does what
788 Perl does - treats the match as successful.
Code Review / bottlenecks.git / blob