Annotation of win32/pcre/NEWS, revision 1.9
1.1 misha 1: News about PCRE releases
2: ------------------------
3:
1.9 ! moko 4: Note that this library (now called PCRE1) is now being maintained for bug fixes
! 5: only. New projects are advised to use the new PCRE2 libraries.
! 6:
! 7:
! 8: Release 8.43 23-February-2019
! 9: -----------------------------
! 10:
! 11: This is a bug-fix release.
! 12:
! 13:
! 14: Release 8.42 20-March-2018
! 15: --------------------------
! 16:
! 17: This is a bug-fix release.
! 18:
! 19:
! 20: Release 8.41 13-June-2017
! 21: -------------------------
! 22:
! 23: This is a bug-fix release.
! 24:
! 25:
! 26: Release 8.40 11-January-2017
! 27: ----------------------------
! 28:
! 29: This is a bug-fix release.
! 30:
! 31:
! 32: Release 8.39 14-June-2016
! 33: -------------------------
! 34:
! 35: Some appropriate PCRE2 JIT improvements have been retro-fitted to PCRE1. Apart
! 36: from that, this is another bug-fix release. Note that this library (now called
! 37: PCRE1) is now being maintained for bug fixes only. New projects are advised to
! 38: use the new PCRE2 libraries.
! 39:
! 40:
! 41: Release 8.38 23-November-2015
! 42: -----------------------------
! 43:
! 44: This is bug-fix release. Note that this library (now called PCRE1) is now being
! 45: maintained for bug fixes only. New projects are advised to use the new PCRE2
! 46: libraries.
! 47:
! 48:
1.8 moko 49: Release 8.37 28-April-2015
50: --------------------------
51:
52: This is bug-fix release. Note that this library (now called PCRE1) is now being
53: maintained for bug fixes only. New projects are advised to use the new PCRE2
54: libraries.
55:
56:
57: Release 8.36 26-September-2014
58: ------------------------------
59:
60: This is primarily a bug-fix release. However, in addition, the Unicode data
61: tables have been updated to Unicode 7.0.0.
62:
63:
64: Release 8.35 04-April-2014
65: --------------------------
66:
67: There have been performance improvements for classes containing non-ASCII
68: characters and the "auto-possessification" feature has been extended. Other
69: minor improvements have been implemented and bugs fixed. There is a new callout
70: feature to enable applications to do detailed stack checks at compile time, to
71: avoid running out of stack for deeply nested parentheses. The JIT compiler has
72: been extended with experimental support for ARM-64, MIPS-64, and PPC-LE.
73:
74:
75: Release 8.34 15-December-2013
76: -----------------------------
77:
78: As well as fixing the inevitable bugs, performance has been improved by
79: refactoring and extending the amount of "auto-possessification" that PCRE does.
80: Other notable changes:
81:
82: . Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
83: an empty string. If it can, pcretest shows this in its information output.
84:
85: . A back reference to a named subpattern when there is more than one of the
86: same name now checks them in the order in which they appear in the pattern.
87: The first one that is set is used for the reference. Previously only the
88: first one was inspected. This change makes PCRE more compatible with Perl.
89:
90: . Unicode character properties were updated from Unicode 6.3.0.
91:
92: . The character VT has been added to the set of characters that match \s and
93: are generally treated as white space, following this same change in Perl
94: 5.18. There is now no difference between "Perl space" and "POSIX space".
95:
96: . Perl has changed its handling of \8 and \9. If there is no previously
97: encountered capturing group of those numbers, they are treated as the
98: literal characters 8 and 9 instead of a binary zero followed by the
99: literals. PCRE now does the same.
100:
101: . Following Perl, added \o{} to specify codepoints in octal, making it
102: possible to specify values greater than 0777 and also making them
103: unambiguous.
104:
105: . In UCP mode, \s was not matching two of the characters that Perl matches,
106: namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
107: were matched by \h.
108:
109: . Add JIT support for the 64 bit TileGX architecture.
110:
111: . Upgraded the handling of the POSIX classes [:graph:], [:print:], and
112: [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
113: does in Unicode mode.
114:
115: . Perl no longer allows group names to start with digits, so I have made this
116: change also in PCRE.
117:
118: . Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
119: mean "start of word" and "end of word", respectively, as a transition aid.
120:
121:
1.7 misha 122: Release 8.33 28-May-2013
123: --------------------------
124:
125: A number of bugs are fixed, and some performance improvements have been made.
126: There are also some new features, of which these are the most important:
127:
128: . The behaviour of the backtracking verbs has been rationalized and
129: documented in more detail.
130:
131: . JIT now supports callouts and all of the backtracking verbs.
132:
133: . Unicode validation has been updated in the light of Unicode Corrigendum #9,
134: which points out that "non characters" are not "characters that may not
135: appear in Unicode strings" but rather "characters that are reserved for
136: internal use and have only local meaning".
137:
138: . (*LIMIT_MATCH=d) and (*LIMIT_RECURSION=d) have been added so that the
139: creator of a pattern can specify lower (but not higher) limits for the
140: matching process.
141:
142: . The PCRE_NEVER_UTF option is available to prevent pattern-writers from using
143: the (*UTF) feature, as this could be a security issue.
144:
145:
146: Release 8.32 30-November-2012
147: -----------------------------
148:
149: This release fixes a number of bugs, but also has some new features. These are
150: the highlights:
151:
152: . There is now support for 32-bit character strings and UTF-32. Like the
153: 16-bit support, this is done by compiling a separate 32-bit library.
154:
155: . \X now matches a Unicode extended grapheme cluster.
156:
157: . Case-independent matching of Unicode characters that have more than one
158: "other case" now makes all three (or more) characters equivalent. This
159: applies, for example, to Greek Sigma, which has two lowercase versions.
160:
161: . Unicode character properties are updated to Unicode 6.2.0.
162:
163: . The EBCDIC support, which had decayed, has had a spring clean.
164:
165: . A number of JIT optimizations have been added, which give faster JIT
166: execution speed. In addition, a new direct interface to JIT execution is
167: available. This bypasses some of the sanity checks of pcre_exec() to give a
168: noticeable speed-up.
169:
170: . A number of issues in pcregrep have been fixed, making it more compatible
171: with GNU grep. In particular, --exclude and --include (and variants) apply
172: to all files now, not just those obtained from scanning a directory
173: recursively. In Windows environments, the default action for directories is
174: now "skip" instead of "read" (which provokes an error).
175:
176: . If the --only-matching (-o) option in pcregrep is specified multiple
177: times, each one causes appropriate output. For example, -o1 -o2 outputs the
178: substrings matched by the 1st and 2nd capturing parentheses. A separating
179: string can be specified by --om-separator (default empty).
180:
181: . When PCRE is built via Autotools using a version of gcc that has the
182: "visibility" feature, it is used to hide internal library functions that are
183: not part of the public API.
184:
185:
186: Release 8.31 06-July-2012
187: -------------------------
188:
189: This is mainly a bug-fixing release, with a small number of developments:
190:
191: . The JIT compiler now supports partial matching and the (*MARK) and
192: (*COMMIT) verbs.
193:
194: . PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
195: pattern.
196:
197: . There should be a performance improvement when using the heap instead of the
198: stack for recursion.
199:
200: . pcregrep can now be linked with libedit as an alternative to libreadline.
201:
202: . pcregrep now has a --file-list option where the list of files to scan is
203: given as a file.
204:
205: . pcregrep now recognizes binary files and there are related options.
206:
207: . The Unicode tables have been updated to 6.1.0.
208:
209: As always, the full list of changes is in the ChangeLog file.
210:
211:
1.6 misha 212: Release 8.30 04-February-2012
213: -----------------------------
214:
215: Release 8.30 introduces a major new feature: support for 16-bit character
216: strings, compiled as a separate library. There are a few changes to the
217: 8-bit library, in addition to some bug fixes.
218:
219: . The pcre_info() function, which has been obsolete for over 10 years, has
220: been removed.
221:
222: . When a compiled pattern was saved to a file and later reloaded on a host
223: with different endianness, PCRE used automatically to swap the bytes in some
224: of the data fields. With the advent of the 16-bit library, where more of this
225: swapping is needed, it is no longer done automatically. Instead, the bad
226: endianness is detected and a specific error is given. The user can then call
227: a new function called pcre_pattern_to_host_byte_order() (or an equivalent
228: 16-bit function) to do the swap.
229:
230: . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
231: code points and are now faulted. (They are the so-called "surrogates"
232: that are reserved for coding high values in UTF-16.)
233:
234:
235: Release 8.21 12-Dec-2011
236: ------------------------
237:
238: This is almost entirely a bug-fix release. The only new feature is the ability
239: to obtain the size of the memory used by the JIT compiler.
240:
241:
242: Release 8.20 21-Oct-2011
243: ------------------------
244:
245: The main change in this release is the inclusion of Zoltan Herczeg's
246: just-in-time compiler support, which can be accessed by building PCRE with
247: --enable-jit. Large performance benefits can be had in many situations. 8.20
248: also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
249: a number of infelicities and differences from Perl.
250:
251:
252: Release 8.13 16-Aug-2011
253: ------------------------
254:
255: This is mainly a bug-fix release. There has been a lot of internal refactoring.
256: The Unicode tables have been updated. The only new feature in the library is
257: the passing of *MARK information to callouts. Some additions have been made to
258: pcretest to make testing easier and more comprehensive. There is a new option
259: for pcregrep to adjust its internal buffer size.
260:
261:
1.5 misha 262: Release 8.12 15-Jan-2011
263: ------------------------
264:
265: This release fixes some bugs in pcregrep, one of which caused the tests to fail
266: on 64-bit big-endian systems. There are no changes to the code of the library.
267:
268:
269: Release 8.11 10-Dec-2010
270: ------------------------
271:
272: A number of bugs in the library and in pcregrep have been fixed. As always, see
273: ChangeLog for details. The following are the non-bug-fix changes:
274:
275: . Added --match-limit and --recursion-limit to pcregrep.
276:
277: . Added an optional parentheses number to the -o and --only-matching options
278: of pcregrep.
279:
280: . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
281: \B.
282:
283: . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
284: bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
285:
286: . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
287: START_OPTIMIZE option, which is now allowed at compile time
288:
289:
1.4 misha 290: Release 8.10 25-Jun-2010
291: ------------------------
292:
293: There are two major additions: support for (*MARK) and friends, and the option
294: PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
295: opposites) so that they make use of Unicode properties. There are also a number
296: of lesser new features, and several bugs have been fixed. A new option,
297: --line-buffered, has been added to pcregrep, for use when it is connected to
298: pipes.
299:
300:
301: Release 8.02 19-Mar-2010
302: ------------------------
303:
304: Another bug-fix release.
305:
306:
307: Release 8.01 19-Jan-2010
308: ------------------------
309:
310: This is a bug-fix release. Several bugs in the code itself and some bugs and
311: infelicities in the build system have been fixed.
312:
313:
314: Release 8.00 19-Oct-09
315: ----------------------
316:
317: Bugs have been fixed in the library and in pcregrep. There are also some
318: enhancements. Restrictions on patterns used for partial matching have been
319: removed, extra information is given for partial matches, the partial matching
320: process has been improved, and an option to make a partial match override a
321: full match is available. The "study" process has been enhanced by finding a
322: lower bound matching length. Groups with duplicate numbers may now have
323: duplicated names without the use of PCRE_DUPNAMES. However, they may not have
324: different names. The documentation has been revised to reflect these changes.
325: The version number has been expanded to 3 digits as it is clear that the rate
326: of change is not slowing down.
327:
328:
1.3 misha 329: Release 7.9 11-Apr-09
330: ---------------------
331:
332: Mostly bugfixes and tidies with just a couple of minor functional additions.
333:
1.1 misha 334:
1.2 misha 335: Release 7.8 05-Sep-08
336: ---------------------
337:
338: More bug fixes, plus a performance improvement in Unicode character property
339: lookup.
340:
341:
1.1 misha 342: Release 7.7 07-May-08
343: ---------------------
344:
345: This is once again mainly a bug-fix release, but there are a couple of new
346: features.
347:
348:
349: Release 7.6 28-Jan-08
350: ---------------------
351:
352: The main reason for having this release so soon after 7.5 is because it fixes a
353: potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
354: addition, the CMake configuration files have been brought up to date.
355:
356:
357: Release 7.5 10-Jan-08
358: ---------------------
359:
360: This is mainly a bug-fix release. However the ability to link pcregrep with
361: libz or libbz2 and the ability to link pcretest with libreadline have been
362: added. Also the --line-offsets and --file-offsets options were added to
363: pcregrep.
364:
365:
366: Release 7.4 21-Sep-07
367: ---------------------
368:
369: The only change of specification is the addition of options to control whether
370: \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
371: Otherwise, the changes are bug fixes and a refactoring to reduce the number of
372: relocations needed in a shared library. There have also been some documentation
373: updates, in particular, some more information about using CMake to build PCRE
374: has been added to the NON-UNIX-USE file.
375:
376:
377: Release 7.3 28-Aug-07
378: ---------------------
379:
380: Most changes are bug fixes. Some that are not:
381:
382: 1. There is some support for Perl 5.10's experimental "backtracking control
383: verbs" such as (*PRUNE).
384:
385: 2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
386: restrictive in the strings it accepts.
387:
388: 3. Checking for potential integer overflow has been made more dynamic, and as a
389: consequence there is no longer a hard limit on the size of a subpattern that
390: has a limited repeat count.
391:
392: 4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
393: no longer advance by two characters instead of one when an unanchored match
394: fails at CRLF if there are explicit CR or LF matches within the pattern.
395: This gets rid of some anomalous effects that previously occurred.
396:
397: 5. Some PCRE-specific settings for varying the newline options at the start of
398: a pattern have been added.
399:
400:
401: Release 7.2 19-Jun-07
402: ---------------------
403:
404: WARNING: saved patterns that were compiled by earlier versions of PCRE must be
405: recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
406: and \V).
407:
408: Correction to the notes for 7.1: the note about shared libraries for Windows is
409: wrong. Previously, three libraries were built, but each could function
410: independently. For example, the pcreposix library also included all the
411: functions from the basic pcre library. The change is that the three libraries
412: are no longer independent. They are like the Unix libraries. To use the
413: pcreposix functions, for example, you need to link with both the pcreposix and
414: the basic pcre library.
415:
416: Some more features from Perl 5.10 have been added:
417:
418: (?-n) and (?+n) relative references for recursion and subroutines.
419:
420: (?(-n) and (?(+n) relative references as conditions.
421:
422: \k{name} and \g{name} are synonyms for \k<name>.
423:
424: \K to reset the start of the matched string; for example, (foo)\Kbar
425: matches bar preceded by foo, but only sets bar as the matched string.
426:
427: (?| introduces a group where the capturing parentheses in each alternative
428: start from the same number; for example, (?|(abc)|(xyz)) sets capturing
429: parentheses number 1 in both cases.
430:
431: \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
432:
433:
434: Release 7.1 24-Apr-07
435: ---------------------
436:
437: There is only one new feature in this release: a linebreak setting of
438: PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
439: recognizes only CRLF, CR, and LF as linebreaks.
440:
441: A few bugs are fixed (see ChangeLog for details), but the major change is a
442: complete re-implementation of the build system. This now has full Autotools
443: support and so is now "standard" in some sense. It should help with compiling
444: PCRE in a wide variety of environments.
445:
446: NOTE: when building shared libraries for Windows, three dlls are now built,
447: called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
448: included in a single dll.
449:
450: Another important change is that the dftables auxiliary program is no longer
451: compiled and run at "make" time by default. Instead, a default set of character
452: tables (assuming ASCII coding) is used. If you want to use dftables to generate
453: the character tables as previously, add --enable-rebuild-chartables to the
454: "configure" command. You must do this if you are compiling PCRE to run on a
455: system that uses EBCDIC code.
456:
457: There is a discussion about character tables in the README file. The default is
458: not to use dftables so that that there is no problem when cross-compiling.
459:
460:
461: Release 7.0 19-Dec-06
462: ---------------------
463:
464: This release has a new major number because there have been some internal
465: upheavals to facilitate the addition of new optimizations and other facilities,
466: and to make subsequent maintenance and extension easier. Compilation is likely
467: to be a bit slower, but there should be no major effect on runtime performance.
468: Previously compiled patterns are NOT upwards compatible with this release. If
469: you have saved compiled patterns from a previous release, you will have to
470: re-compile them. Important changes that are visible to users are:
471:
472: 1. The Unicode property tables have been updated to Unicode 5.0.0, which adds
473: some more scripts.
474:
475: 2. The option PCRE_NEWLINE_ANY causes PCRE to recognize any Unicode newline
476: sequence as a newline.
477:
478: 3. The \R escape matches a single Unicode newline sequence as a single unit.
479:
480: 4. New features that will appear in Perl 5.10 are now in PCRE. These include
481: alternative Perl syntax for named parentheses, and Perl syntax for
482: recursion.
483:
484: 5. The C++ wrapper interface has been extended by the addition of a
485: QuoteMeta function and the ability to allow copy construction and
486: assignment.
487:
488: For a complete list of changes, see the ChangeLog file.
489:
490:
491: Release 6.7 04-Jul-06
492: ---------------------
493:
494: The main additions to this release are the ability to use the same name for
495: multiple sets of parentheses, and support for CRLF line endings in both the
496: library and pcregrep (and in pcretest for testing).
497:
498: Thanks to Ian Taylor, the stack usage for many kinds of pattern has been
499: significantly reduced for certain subject strings.
500:
501:
502: Release 6.5 01-Feb-06
503: ---------------------
504:
505: Important changes in this release:
506:
507: 1. A number of new features have been added to pcregrep.
508:
509: 2. The Unicode property tables have been updated to Unicode 4.1.0, and the
510: supported properties have been extended with script names such as "Arabic",
511: and the derived properties "Any" and "L&". This has necessitated a change to
512: the interal format of compiled patterns. Any saved compiled patterns that
513: use \p or \P must be recompiled.
514:
515: 3. The specification of recursion in patterns has been changed so that all
516: recursive subpatterns are automatically treated as atomic groups. Thus, for
517: example, (?R) is treated as if it were (?>(?R)). This is necessary because
518: otherwise there are situations where recursion does not work.
519:
520: See the ChangeLog for a complete list of changes, which include a number of bug
521: fixes and tidies.
522:
523:
524: Release 6.0 07-Jun-05
525: ---------------------
526:
527: The release number has been increased to 6.0 because of the addition of several
528: major new pieces of functionality.
529:
530: A new function, pcre_dfa_exec(), which implements pattern matching using a DFA
531: algorithm, has been added. This has a number of advantages for certain cases,
532: though it does run more slowly, and lacks the ability to capture substrings. On
533: the other hand, it does find all matches, not just the first, and it works
534: better for partial matching. The pcrematching man page discusses the
535: differences.
536:
537: The pcretest program has been enhanced so that it can make use of the new
538: pcre_dfa_exec() matching function and the extra features it provides.
539:
540: The distribution now includes a C++ wrapper library. This is built
541: automatically if a C++ compiler is found. The pcrecpp man page discusses this
542: interface.
543:
544: The code itself has been re-organized into many more files, one for each
545: function, so it no longer requires everything to be linked in when static
546: linkage is used. As a consequence, some internal functions have had to have
547: their names exposed. These functions all have names starting with _pcre_. They
548: are undocumented, and are not intended for use by outside callers.
549:
550: The pcregrep program has been enhanced with new functionality such as
551: multiline-matching and options for output more matching context. See the
552: ChangeLog for a complete list of changes to the library and the utility
553: programs.
554:
555:
556: Release 5.0 13-Sep-04
557: ---------------------
558:
559: The licence under which PCRE is released has been changed to the more
560: conventional "BSD" licence.
561:
562: In the code, some bugs have been fixed, and there are also some major changes
563: in this release (which is why I've increased the number to 5.0). Some changes
564: are internal rearrangements, and some provide a number of new facilities. The
565: new features are:
566:
567: 1. There's an "automatic callout" feature that inserts callouts before every
568: item in the regex, and there's a new callout field that gives the position
569: in the pattern - useful for debugging and tracing.
570:
571: 2. The extra_data structure can now be used to pass in a set of character
572: tables at exec time. This is useful if compiled regex are saved and re-used
573: at a later time when the tables may not be at the same address. If the
574: default internal tables are used, the pointer saved with the compiled
575: pattern is now set to NULL, which means that you don't need to do anything
576: special unless you are using custom tables.
577:
578: 3. It is possible, with some restrictions on the content of the regex, to
579: request "partial" matching. A special return code is given if all of the
580: subject string matched part of the regex. This could be useful for testing
581: an input field as it is being typed.
582:
583: 4. There is now some optional support for Unicode character properties, which
584: means that the patterns items such as \p{Lu} and \X can now be used. Only
585: the general category properties are supported. If PCRE is compiled with this
586: support, an additional 90K data structure is include, which increases the
587: size of the library dramatically.
588:
589: 5. There is support for saving compiled patterns and re-using them later.
590:
591: 6. There is support for running regular expressions that were compiled on a
592: different host with the opposite endianness.
593:
594: 7. The pcretest program has been extended to accommodate the new features.
595:
596: The main internal rearrangement is that sequences of literal characters are no
597: longer handled as strings. Instead, each character is handled on its own. This
598: makes some UTF-8 handling easier, and makes the support of partial matching
599: possible. Compiled patterns containing long literal strings will be larger as a
600: result of this change; I hope that performance will not be much affected.
601:
602:
603: Release 4.5 01-Dec-03
604: ---------------------
605:
606: Again mainly a bug-fix and tidying release, with only a couple of new features:
607:
608: 1. It's possible now to compile PCRE so that it does not use recursive
609: function calls when matching. Instead it gets memory from the heap. This slows
610: things down, but may be necessary on systems with limited stacks.
611:
612: 2. UTF-8 string checking has been tightened to reject overlong sequences and to
613: check that a starting offset points to the start of a character. Failure of the
614: latter returns a new error code: PCRE_ERROR_BADUTF8_OFFSET.
615:
616: 3. PCRE can now be compiled for systems that use EBCDIC code.
617:
618:
619: Release 4.4 21-Aug-03
620: ---------------------
621:
622: This is mainly a bug-fix and tidying release. The only new feature is that PCRE
623: checks UTF-8 strings for validity by default. There is an option to suppress
624: this, just in case anybody wants that teeny extra bit of performance.
625:
626:
627: Releases 4.1 - 4.3
628: ------------------
629:
630: Sorry, I forgot about updating the NEWS file for these releases. Please take a
631: look at ChangeLog.
632:
633:
634: Release 4.0 17-Feb-03
635: ---------------------
636:
637: There have been a lot of changes for the 4.0 release, adding additional
638: functionality and mending bugs. Below is a list of the highlights of the new
639: functionality. For full details of these features, please consult the
640: documentation. For a complete list of changes, see the ChangeLog file.
641:
642: 1. Support for Perl's \Q...\E escapes.
643:
644: 2. "Possessive quantifiers" ?+, *+, ++, and {,}+ which come from Sun's Java
645: package. They provide some syntactic sugar for simple cases of "atomic
646: grouping".
647:
648: 3. Support for the \G assertion. It is true when the current matching position
649: is at the start point of the match.
650:
651: 4. A new feature that provides some of the functionality that Perl provides
652: with (?{...}). The facility is termed a "callout". The way it is done in PCRE
653: is for the caller to provide an optional function, by setting pcre_callout to
654: its entry point. To get the function called, the regex must include (?C) at
655: appropriate points.
656:
657: 5. Support for recursive calls to individual subpatterns. This makes it really
658: easy to get totally confused.
659:
660: 6. Support for named subpatterns. The Python syntax (?P<name>...) is used to
661: name a group.
662:
663: 7. Several extensions to UTF-8 support; it is now fairly complete. There is an
664: option for pcregrep to make it operate in UTF-8 mode.
665:
666: 8. The single man page has been split into a number of separate man pages.
667: These also give rise to individual HTML pages which are put in a separate
668: directory. There is an index.html page that lists them all. Some hyperlinking
669: between the pages has been installed.
670:
671:
672: Release 3.5 15-Aug-01
673: ---------------------
674:
675: 1. The configuring system has been upgraded to use later versions of autoconf
676: and libtool. By default it builds both a shared and a static library if the OS
677: supports it. You can use --disable-shared or --disable-static on the configure
678: command if you want only one of them.
679:
680: 2. The pcretest utility is now installed along with pcregrep because it is
681: useful for users (to test regexs) and by doing this, it automatically gets
682: relinked by libtool. The documentation has been turned into a man page, so
683: there are now .1, .txt, and .html versions in /doc.
684:
685: 3. Upgrades to pcregrep:
686: (i) Added long-form option names like gnu grep.
687: (ii) Added --help to list all options with an explanatory phrase.
688: (iii) Added -r, --recursive to recurse into sub-directories.
689: (iv) Added -f, --file to read patterns from a file.
690:
691: 4. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure
692: script, to force use of CR or LF instead of \n in the source. On non-Unix
693: systems, the value can be set in config.h.
694:
695: 5. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an
696: absolute limit. Changed the text of the error message to make this clear, and
697: likewise updated the man page.
698:
699: 6. The limit of 99 on the number of capturing subpatterns has been removed.
700: The new limit is 65535, which I hope will not be a "real" limit.
701:
702:
703: Release 3.3 01-Aug-00
704: ---------------------
705:
706: There is some support for UTF-8 character strings. This is incomplete and
707: experimental. The documentation describes what is and what is not implemented.
708: Otherwise, this is just a bug-fixing release.
709:
710:
711: Release 3.0 01-Feb-00
712: ---------------------
713:
714: 1. A "configure" script is now used to configure PCRE for Unix systems. It
715: builds a Makefile, a config.h file, and the pcre-config script.
716:
717: 2. PCRE is built as a shared library by default.
718:
719: 3. There is support for POSIX classes such as [:alpha:].
720:
721: 5. There is an experimental recursion feature.
722:
723: ----------------------------------------------------------------------------
724: IMPORTANT FOR THOSE UPGRADING FROM VERSIONS BEFORE 2.00
725:
726: Please note that there has been a change in the API such that a larger
727: ovector is required at matching time, to provide some additional workspace.
728: The new man page has details. This change was necessary in order to support
729: some of the new functionality in Perl 5.005.
730:
731: IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.00
732:
733: Another (I hope this is the last!) change has been made to the API for the
734: pcre_compile() function. An additional argument has been added to make it
735: possible to pass over a pointer to character tables built in the current
1.7 misha 736: locale by pcre_maketables(). To use the default tables, this new argument
1.1 misha 737: should be passed as NULL.
738:
739: IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05
740:
741: Yet another (and again I hope this really is the last) change has been made
742: to the API for the pcre_exec() function. An additional argument has been
743: added to make it possible to start the match other than at the start of the
744: subject string. This is important if there are lookbehinds. The new man
745: page has the details, but you just want to convert existing programs, all
746: you need to do is to stick in a new fifth argument to pcre_exec(), with a
747: value of zero. For example, change
748:
749: pcre_exec(pattern, extra, subject, length, options, ovec, ovecsize)
750: to
751: pcre_exec(pattern, extra, subject, length, 0, options, ovec, ovecsize)
752:
753: ****
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