/[pcre]/code/trunk/NEWS
ViewVC logotype

Contents of /code/trunk/NEWS

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1459 - (show annotations)
Tue Mar 4 10:45:15 2014 UTC (5 years, 7 months ago) by ph10
File size: 27830 byte(s)
Preparations for next release.
1 News about PCRE releases
2 ------------------------
3
4 Release 8.35 04-March-2014
5 --------------------------
6
7 There have been performance improvements for classes containing non-ASCII
8 characters and the "auto-possessification" feature has been extended. Other
9 minor improvements have been implemented and bugs fixed. There is a new callout
10 feature to enable applications to do detailed stack checks at compile time, to
11 avoid running out of stack for deeply nested parentheses.
12
13
14 Release 8.34 15-December-2013
15 -----------------------------
16
17 As well as fixing the inevitable bugs, performance has been improved by
18 refactoring and extending the amount of "auto-possessification" that PCRE does.
19 Other notable changes:
20
21 . Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
22 an empty string. If it can, pcretest shows this in its information output.
23
24 . A back reference to a named subpattern when there is more than one of the
25 same name now checks them in the order in which they appear in the pattern.
26 The first one that is set is used for the reference. Previously only the
27 first one was inspected. This change makes PCRE more compatible with Perl.
28
29 . Unicode character properties were updated from Unicode 6.3.0.
30
31 . The character VT has been added to the set of characters that match \s and
32 are generally treated as white space, following this same change in Perl
33 5.18. There is now no difference between "Perl space" and "POSIX space".
34
35 . Perl has changed its handling of \8 and \9. If there is no previously
36 encountered capturing group of those numbers, they are treated as the
37 literal characters 8 and 9 instead of a binary zero followed by the
38 literals. PCRE now does the same.
39
40 . Following Perl, added \o{} to specify codepoints in octal, making it
41 possible to specify values greater than 0777 and also making them
42 unambiguous.
43
44 . In UCP mode, \s was not matching two of the characters that Perl matches,
45 namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
46 were matched by \h.
47
48 . Add JIT support for the 64 bit TileGX architecture.
49
50 . Upgraded the handling of the POSIX classes [:graph:], [:print:], and
51 [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
52 does in Unicode mode.
53
54 . Perl no longer allows group names to start with digits, so I have made this
55 change also in PCRE.
56
57 . Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
58 mean "start of word" and "end of word", respectively, as a transition aid.
59
60
61 Release 8.33 28-May-2013
62 --------------------------
63
64 A number of bugs are fixed, and some performance improvements have been made.
65 There are also some new features, of which these are the most important:
66
67 . The behaviour of the backtracking verbs has been rationalized and
68 documented in more detail.
69
70 . JIT now supports callouts and all of the backtracking verbs.
71
72 . Unicode validation has been updated in the light of Unicode Corrigendum #9,
73 which points out that "non characters" are not "characters that may not
74 appear in Unicode strings" but rather "characters that are reserved for
75 internal use and have only local meaning".
76
77 . (*LIMIT_MATCH=d) and (*LIMIT_RECURSION=d) have been added so that the
78 creator of a pattern can specify lower (but not higher) limits for the
79 matching process.
80
81 . The PCRE_NEVER_UTF option is available to prevent pattern-writers from using
82 the (*UTF) feature, as this could be a security issue.
83
84
85 Release 8.32 30-November-2012
86 -----------------------------
87
88 This release fixes a number of bugs, but also has some new features. These are
89 the highlights:
90
91 . There is now support for 32-bit character strings and UTF-32. Like the
92 16-bit support, this is done by compiling a separate 32-bit library.
93
94 . \X now matches a Unicode extended grapheme cluster.
95
96 . Case-independent matching of Unicode characters that have more than one
97 "other case" now makes all three (or more) characters equivalent. This
98 applies, for example, to Greek Sigma, which has two lowercase versions.
99
100 . Unicode character properties are updated to Unicode 6.2.0.
101
102 . The EBCDIC support, which had decayed, has had a spring clean.
103
104 . A number of JIT optimizations have been added, which give faster JIT
105 execution speed. In addition, a new direct interface to JIT execution is
106 available. This bypasses some of the sanity checks of pcre_exec() to give a
107 noticeable speed-up.
108
109 . A number of issues in pcregrep have been fixed, making it more compatible
110 with GNU grep. In particular, --exclude and --include (and variants) apply
111 to all files now, not just those obtained from scanning a directory
112 recursively. In Windows environments, the default action for directories is
113 now "skip" instead of "read" (which provokes an error).
114
115 . If the --only-matching (-o) option in pcregrep is specified multiple
116 times, each one causes appropriate output. For example, -o1 -o2 outputs the
117 substrings matched by the 1st and 2nd capturing parentheses. A separating
118 string can be specified by --om-separator (default empty).
119
120 . When PCRE is built via Autotools using a version of gcc that has the
121 "visibility" feature, it is used to hide internal library functions that are
122 not part of the public API.
123
124
125 Release 8.31 06-July-2012
126 -------------------------
127
128 This is mainly a bug-fixing release, with a small number of developments:
129
130 . The JIT compiler now supports partial matching and the (*MARK) and
131 (*COMMIT) verbs.
132
133 . PCRE_INFO_MAXLOOKBEHIND can be used to find the longest lookbehind in a
134 pattern.
135
136 . There should be a performance improvement when using the heap instead of the
137 stack for recursion.
138
139 . pcregrep can now be linked with libedit as an alternative to libreadline.
140
141 . pcregrep now has a --file-list option where the list of files to scan is
142 given as a file.
143
144 . pcregrep now recognizes binary files and there are related options.
145
146 . The Unicode tables have been updated to 6.1.0.
147
148 As always, the full list of changes is in the ChangeLog file.
149
150
151 Release 8.30 04-February-2012
152 -----------------------------
153
154 Release 8.30 introduces a major new feature: support for 16-bit character
155 strings, compiled as a separate library. There are a few changes to the
156 8-bit library, in addition to some bug fixes.
157
158 . The pcre_info() function, which has been obsolete for over 10 years, has
159 been removed.
160
161 . When a compiled pattern was saved to a file and later reloaded on a host
162 with different endianness, PCRE used automatically to swap the bytes in some
163 of the data fields. With the advent of the 16-bit library, where more of this
164 swapping is needed, it is no longer done automatically. Instead, the bad
165 endianness is detected and a specific error is given. The user can then call
166 a new function called pcre_pattern_to_host_byte_order() (or an equivalent
167 16-bit function) to do the swap.
168
169 . In UTF-8 mode, the values 0xd800 to 0xdfff are not legal Unicode
170 code points and are now faulted. (They are the so-called "surrogates"
171 that are reserved for coding high values in UTF-16.)
172
173
174 Release 8.21 12-Dec-2011
175 ------------------------
176
177 This is almost entirely a bug-fix release. The only new feature is the ability
178 to obtain the size of the memory used by the JIT compiler.
179
180
181 Release 8.20 21-Oct-2011
182 ------------------------
183
184 The main change in this release is the inclusion of Zoltan Herczeg's
185 just-in-time compiler support, which can be accessed by building PCRE with
186 --enable-jit. Large performance benefits can be had in many situations. 8.20
187 also fixes an unfortunate bug that was introduced in 8.13 as well as tidying up
188 a number of infelicities and differences from Perl.
189
190
191 Release 8.13 16-Aug-2011
192 ------------------------
193
194 This is mainly a bug-fix release. There has been a lot of internal refactoring.
195 The Unicode tables have been updated. The only new feature in the library is
196 the passing of *MARK information to callouts. Some additions have been made to
197 pcretest to make testing easier and more comprehensive. There is a new option
198 for pcregrep to adjust its internal buffer size.
199
200
201 Release 8.12 15-Jan-2011
202 ------------------------
203
204 This release fixes some bugs in pcregrep, one of which caused the tests to fail
205 on 64-bit big-endian systems. There are no changes to the code of the library.
206
207
208 Release 8.11 10-Dec-2010
209 ------------------------
210
211 A number of bugs in the library and in pcregrep have been fixed. As always, see
212 ChangeLog for details. The following are the non-bug-fix changes:
213
214 . Added --match-limit and --recursion-limit to pcregrep.
215
216 . Added an optional parentheses number to the -o and --only-matching options
217 of pcregrep.
218
219 . Changed the way PCRE_PARTIAL_HARD affects the matching of $, \z, \Z, \b, and
220 \B.
221
222 . Added PCRE_ERROR_SHORTUTF8 to make it possible to distinguish between a
223 bad UTF-8 sequence and one that is incomplete when using PCRE_PARTIAL_HARD.
224
225 . Recognize (*NO_START_OPT) at the start of a pattern to set the PCRE_NO_
226 START_OPTIMIZE option, which is now allowed at compile time
227
228
229 Release 8.10 25-Jun-2010
230 ------------------------
231
232 There are two major additions: support for (*MARK) and friends, and the option
233 PCRE_UCP, which changes the behaviour of \b, \d, \s, and \w (and their
234 opposites) so that they make use of Unicode properties. There are also a number
235 of lesser new features, and several bugs have been fixed. A new option,
236 --line-buffered, has been added to pcregrep, for use when it is connected to
237 pipes.
238
239
240 Release 8.02 19-Mar-2010
241 ------------------------
242
243 Another bug-fix release.
244
245
246 Release 8.01 19-Jan-2010
247 ------------------------
248
249 This is a bug-fix release. Several bugs in the code itself and some bugs and
250 infelicities in the build system have been fixed.
251
252
253 Release 8.00 19-Oct-09
254 ----------------------
255
256 Bugs have been fixed in the library and in pcregrep. There are also some
257 enhancements. Restrictions on patterns used for partial matching have been
258 removed, extra information is given for partial matches, the partial matching
259 process has been improved, and an option to make a partial match override a
260 full match is available. The "study" process has been enhanced by finding a
261 lower bound matching length. Groups with duplicate numbers may now have
262 duplicated names without the use of PCRE_DUPNAMES. However, they may not have
263 different names. The documentation has been revised to reflect these changes.
264 The version number has been expanded to 3 digits as it is clear that the rate
265 of change is not slowing down.
266
267
268 Release 7.9 11-Apr-09
269 ---------------------
270
271 Mostly bugfixes and tidies with just a couple of minor functional additions.
272
273
274 Release 7.8 05-Sep-08
275 ---------------------
276
277 More bug fixes, plus a performance improvement in Unicode character property
278 lookup.
279
280
281 Release 7.7 07-May-08
282 ---------------------
283
284 This is once again mainly a bug-fix release, but there are a couple of new
285 features.
286
287
288 Release 7.6 28-Jan-08
289 ---------------------
290
291 The main reason for having this release so soon after 7.5 is because it fixes a
292 potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
293 addition, the CMake configuration files have been brought up to date.
294
295
296 Release 7.5 10-Jan-08
297 ---------------------
298
299 This is mainly a bug-fix release. However the ability to link pcregrep with
300 libz or libbz2 and the ability to link pcretest with libreadline have been
301 added. Also the --line-offsets and --file-offsets options were added to
302 pcregrep.
303
304
305 Release 7.4 21-Sep-07
306 ---------------------
307
308 The only change of specification is the addition of options to control whether
309 \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
310 Otherwise, the changes are bug fixes and a refactoring to reduce the number of
311 relocations needed in a shared library. There have also been some documentation
312 updates, in particular, some more information about using CMake to build PCRE
313 has been added to the NON-UNIX-USE file.
314
315
316 Release 7.3 28-Aug-07
317 ---------------------
318
319 Most changes are bug fixes. Some that are not:
320
321 1. There is some support for Perl 5.10's experimental "backtracking control
322 verbs" such as (*PRUNE).
323
324 2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
325 restrictive in the strings it accepts.
326
327 3. Checking for potential integer overflow has been made more dynamic, and as a
328 consequence there is no longer a hard limit on the size of a subpattern that
329 has a limited repeat count.
330
331 4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
332 no longer advance by two characters instead of one when an unanchored match
333 fails at CRLF if there are explicit CR or LF matches within the pattern.
334 This gets rid of some anomalous effects that previously occurred.
335
336 5. Some PCRE-specific settings for varying the newline options at the start of
337 a pattern have been added.
338
339
340 Release 7.2 19-Jun-07
341 ---------------------
342
343 WARNING: saved patterns that were compiled by earlier versions of PCRE must be
344 recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
345 and \V).
346
347 Correction to the notes for 7.1: the note about shared libraries for Windows is
348 wrong. Previously, three libraries were built, but each could function
349 independently. For example, the pcreposix library also included all the
350 functions from the basic pcre library. The change is that the three libraries
351 are no longer independent. They are like the Unix libraries. To use the
352 pcreposix functions, for example, you need to link with both the pcreposix and
353 the basic pcre library.
354
355 Some more features from Perl 5.10 have been added:
356
357 (?-n) and (?+n) relative references for recursion and subroutines.
358
359 (?(-n) and (?(+n) relative references as conditions.
360
361 \k{name} and \g{name} are synonyms for \k<name>.
362
363 \K to reset the start of the matched string; for example, (foo)\Kbar
364 matches bar preceded by foo, but only sets bar as the matched string.
365
366 (?| introduces a group where the capturing parentheses in each alternative
367 start from the same number; for example, (?|(abc)|(xyz)) sets capturing
368 parentheses number 1 in both cases.
369
370 \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
371
372
373 Release 7.1 24-Apr-07
374 ---------------------
375
376 There is only one new feature in this release: a linebreak setting of
377 PCRE_NEWLINE_ANYCRLF. It is a cut-down version of PCRE_NEWLINE_ANY, which
378 recognizes only CRLF, CR, and LF as linebreaks.
379
380 A few bugs are fixed (see ChangeLog for details), but the major change is a
381 complete re-implementation of the build system. This now has full Autotools
382 support and so is now "standard" in some sense. It should help with compiling
383 PCRE in a wide variety of environments.
384
385 NOTE: when building shared libraries for Windows, three dlls are now built,
386 called libpcre, libpcreposix, and libpcrecpp. Previously, everything was
387 included in a single dll.
388
389 Another important change is that the dftables auxiliary program is no longer
390 compiled and run at "make" time by default. Instead, a default set of character
391 tables (assuming ASCII coding) is used. If you want to use dftables to generate
392 the character tables as previously, add --enable-rebuild-chartables to the
393 "configure" command. You must do this if you are compiling PCRE to run on a
394 system that uses EBCDIC code.
395
396 There is a discussion about character tables in the README file. The default is
397 not to use dftables so that that there is no problem when cross-compiling.
398
399
400 Release 7.0 19-Dec-06
401 ---------------------
402
403 This release has a new major number because there have been some internal
404 upheavals to facilitate the addition of new optimizations and other facilities,
405 and to make subsequent maintenance and extension easier. Compilation is likely
406 to be a bit slower, but there should be no major effect on runtime performance.
407 Previously compiled patterns are NOT upwards compatible with this release. If
408 you have saved compiled patterns from a previous release, you will have to
409 re-compile them. Important changes that are visible to users are:
410
411 1. The Unicode property tables have been updated to Unicode 5.0.0, which adds
412 some more scripts.
413
414 2. The option PCRE_NEWLINE_ANY causes PCRE to recognize any Unicode newline
415 sequence as a newline.
416
417 3. The \R escape matches a single Unicode newline sequence as a single unit.
418
419 4. New features that will appear in Perl 5.10 are now in PCRE. These include
420 alternative Perl syntax for named parentheses, and Perl syntax for
421 recursion.
422
423 5. The C++ wrapper interface has been extended by the addition of a
424 QuoteMeta function and the ability to allow copy construction and
425 assignment.
426
427 For a complete list of changes, see the ChangeLog file.
428
429
430 Release 6.7 04-Jul-06
431 ---------------------
432
433 The main additions to this release are the ability to use the same name for
434 multiple sets of parentheses, and support for CRLF line endings in both the
435 library and pcregrep (and in pcretest for testing).
436
437 Thanks to Ian Taylor, the stack usage for many kinds of pattern has been
438 significantly reduced for certain subject strings.
439
440
441 Release 6.5 01-Feb-06
442 ---------------------
443
444 Important changes in this release:
445
446 1. A number of new features have been added to pcregrep.
447
448 2. The Unicode property tables have been updated to Unicode 4.1.0, and the
449 supported properties have been extended with script names such as "Arabic",
450 and the derived properties "Any" and "L&". This has necessitated a change to
451 the interal format of compiled patterns. Any saved compiled patterns that
452 use \p or \P must be recompiled.
453
454 3. The specification of recursion in patterns has been changed so that all
455 recursive subpatterns are automatically treated as atomic groups. Thus, for
456 example, (?R) is treated as if it were (?>(?R)). This is necessary because
457 otherwise there are situations where recursion does not work.
458
459 See the ChangeLog for a complete list of changes, which include a number of bug
460 fixes and tidies.
461
462
463 Release 6.0 07-Jun-05
464 ---------------------
465
466 The release number has been increased to 6.0 because of the addition of several
467 major new pieces of functionality.
468
469 A new function, pcre_dfa_exec(), which implements pattern matching using a DFA
470 algorithm, has been added. This has a number of advantages for certain cases,
471 though it does run more slowly, and lacks the ability to capture substrings. On
472 the other hand, it does find all matches, not just the first, and it works
473 better for partial matching. The pcrematching man page discusses the
474 differences.
475
476 The pcretest program has been enhanced so that it can make use of the new
477 pcre_dfa_exec() matching function and the extra features it provides.
478
479 The distribution now includes a C++ wrapper library. This is built
480 automatically if a C++ compiler is found. The pcrecpp man page discusses this
481 interface.
482
483 The code itself has been re-organized into many more files, one for each
484 function, so it no longer requires everything to be linked in when static
485 linkage is used. As a consequence, some internal functions have had to have
486 their names exposed. These functions all have names starting with _pcre_. They
487 are undocumented, and are not intended for use by outside callers.
488
489 The pcregrep program has been enhanced with new functionality such as
490 multiline-matching and options for output more matching context. See the
491 ChangeLog for a complete list of changes to the library and the utility
492 programs.
493
494
495 Release 5.0 13-Sep-04
496 ---------------------
497
498 The licence under which PCRE is released has been changed to the more
499 conventional "BSD" licence.
500
501 In the code, some bugs have been fixed, and there are also some major changes
502 in this release (which is why I've increased the number to 5.0). Some changes
503 are internal rearrangements, and some provide a number of new facilities. The
504 new features are:
505
506 1. There's an "automatic callout" feature that inserts callouts before every
507 item in the regex, and there's a new callout field that gives the position
508 in the pattern - useful for debugging and tracing.
509
510 2. The extra_data structure can now be used to pass in a set of character
511 tables at exec time. This is useful if compiled regex are saved and re-used
512 at a later time when the tables may not be at the same address. If the
513 default internal tables are used, the pointer saved with the compiled
514 pattern is now set to NULL, which means that you don't need to do anything
515 special unless you are using custom tables.
516
517 3. It is possible, with some restrictions on the content of the regex, to
518 request "partial" matching. A special return code is given if all of the
519 subject string matched part of the regex. This could be useful for testing
520 an input field as it is being typed.
521
522 4. There is now some optional support for Unicode character properties, which
523 means that the patterns items such as \p{Lu} and \X can now be used. Only
524 the general category properties are supported. If PCRE is compiled with this
525 support, an additional 90K data structure is include, which increases the
526 size of the library dramatically.
527
528 5. There is support for saving compiled patterns and re-using them later.
529
530 6. There is support for running regular expressions that were compiled on a
531 different host with the opposite endianness.
532
533 7. The pcretest program has been extended to accommodate the new features.
534
535 The main internal rearrangement is that sequences of literal characters are no
536 longer handled as strings. Instead, each character is handled on its own. This
537 makes some UTF-8 handling easier, and makes the support of partial matching
538 possible. Compiled patterns containing long literal strings will be larger as a
539 result of this change; I hope that performance will not be much affected.
540
541
542 Release 4.5 01-Dec-03
543 ---------------------
544
545 Again mainly a bug-fix and tidying release, with only a couple of new features:
546
547 1. It's possible now to compile PCRE so that it does not use recursive
548 function calls when matching. Instead it gets memory from the heap. This slows
549 things down, but may be necessary on systems with limited stacks.
550
551 2. UTF-8 string checking has been tightened to reject overlong sequences and to
552 check that a starting offset points to the start of a character. Failure of the
553 latter returns a new error code: PCRE_ERROR_BADUTF8_OFFSET.
554
555 3. PCRE can now be compiled for systems that use EBCDIC code.
556
557
558 Release 4.4 21-Aug-03
559 ---------------------
560
561 This is mainly a bug-fix and tidying release. The only new feature is that PCRE
562 checks UTF-8 strings for validity by default. There is an option to suppress
563 this, just in case anybody wants that teeny extra bit of performance.
564
565
566 Releases 4.1 - 4.3
567 ------------------
568
569 Sorry, I forgot about updating the NEWS file for these releases. Please take a
570 look at ChangeLog.
571
572
573 Release 4.0 17-Feb-03
574 ---------------------
575
576 There have been a lot of changes for the 4.0 release, adding additional
577 functionality and mending bugs. Below is a list of the highlights of the new
578 functionality. For full details of these features, please consult the
579 documentation. For a complete list of changes, see the ChangeLog file.
580
581 1. Support for Perl's \Q...\E escapes.
582
583 2. "Possessive quantifiers" ?+, *+, ++, and {,}+ which come from Sun's Java
584 package. They provide some syntactic sugar for simple cases of "atomic
585 grouping".
586
587 3. Support for the \G assertion. It is true when the current matching position
588 is at the start point of the match.
589
590 4. A new feature that provides some of the functionality that Perl provides
591 with (?{...}). The facility is termed a "callout". The way it is done in PCRE
592 is for the caller to provide an optional function, by setting pcre_callout to
593 its entry point. To get the function called, the regex must include (?C) at
594 appropriate points.
595
596 5. Support for recursive calls to individual subpatterns. This makes it really
597 easy to get totally confused.
598
599 6. Support for named subpatterns. The Python syntax (?P<name>...) is used to
600 name a group.
601
602 7. Several extensions to UTF-8 support; it is now fairly complete. There is an
603 option for pcregrep to make it operate in UTF-8 mode.
604
605 8. The single man page has been split into a number of separate man pages.
606 These also give rise to individual HTML pages which are put in a separate
607 directory. There is an index.html page that lists them all. Some hyperlinking
608 between the pages has been installed.
609
610
611 Release 3.5 15-Aug-01
612 ---------------------
613
614 1. The configuring system has been upgraded to use later versions of autoconf
615 and libtool. By default it builds both a shared and a static library if the OS
616 supports it. You can use --disable-shared or --disable-static on the configure
617 command if you want only one of them.
618
619 2. The pcretest utility is now installed along with pcregrep because it is
620 useful for users (to test regexs) and by doing this, it automatically gets
621 relinked by libtool. The documentation has been turned into a man page, so
622 there are now .1, .txt, and .html versions in /doc.
623
624 3. Upgrades to pcregrep:
625 (i) Added long-form option names like gnu grep.
626 (ii) Added --help to list all options with an explanatory phrase.
627 (iii) Added -r, --recursive to recurse into sub-directories.
628 (iv) Added -f, --file to read patterns from a file.
629
630 4. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure
631 script, to force use of CR or LF instead of \n in the source. On non-Unix
632 systems, the value can be set in config.h.
633
634 5. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an
635 absolute limit. Changed the text of the error message to make this clear, and
636 likewise updated the man page.
637
638 6. The limit of 99 on the number of capturing subpatterns has been removed.
639 The new limit is 65535, which I hope will not be a "real" limit.
640
641
642 Release 3.3 01-Aug-00
643 ---------------------
644
645 There is some support for UTF-8 character strings. This is incomplete and
646 experimental. The documentation describes what is and what is not implemented.
647 Otherwise, this is just a bug-fixing release.
648
649
650 Release 3.0 01-Feb-00
651 ---------------------
652
653 1. A "configure" script is now used to configure PCRE for Unix systems. It
654 builds a Makefile, a config.h file, and the pcre-config script.
655
656 2. PCRE is built as a shared library by default.
657
658 3. There is support for POSIX classes such as [:alpha:].
659
660 5. There is an experimental recursion feature.
661
662 ----------------------------------------------------------------------------
663 IMPORTANT FOR THOSE UPGRADING FROM VERSIONS BEFORE 2.00
664
665 Please note that there has been a change in the API such that a larger
666 ovector is required at matching time, to provide some additional workspace.
667 The new man page has details. This change was necessary in order to support
668 some of the new functionality in Perl 5.005.
669
670 IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.00
671
672 Another (I hope this is the last!) change has been made to the API for the
673 pcre_compile() function. An additional argument has been added to make it
674 possible to pass over a pointer to character tables built in the current
675 locale by pcre_maketables(). To use the default tables, this new argument
676 should be passed as NULL.
677
678 IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05
679
680 Yet another (and again I hope this really is the last) change has been made
681 to the API for the pcre_exec() function. An additional argument has been
682 added to make it possible to start the match other than at the start of the
683 subject string. This is important if there are lookbehinds. The new man
684 page has the details, but you just want to convert existing programs, all
685 you need to do is to stick in a new fifth argument to pcre_exec(), with a
686 value of zero. For example, change
687
688 pcre_exec(pattern, extra, subject, length, options, ovec, ovecsize)
689 to
690 pcre_exec(pattern, extra, subject, length, 0, options, ovec, ovecsize)
691
692 ****

Properties

Name Value
svn:eol-style native
svn:keywords "Author Date Id Revision Url"

  ViewVC Help
Powered by ViewVC 1.1.5