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revision 873 by ph10, Tue Oct 11 10:29:36 2011 UTC revision 874 by ph10, Sat Jan 14 17:03:15 2012 UTC
# Line 115  distribution for a new release. Line 115  distribution for a new release.
115    different configurations, and it also runs some of them with valgrind, all of    different configurations, and it also runs some of them with valgrind, all of
116    which can take quite some time.    which can take quite some time.
117    
118  . Run perltest.pl on the test data for tests 1, 4, 6, 11, and 12. The output  . Run perltest.pl on the test data for tests 1, 4, and 6. The output
119    should match the PCRE test output, apart from the version identification at    should match the PCRE test output, apart from the version identification at
120    the start of each test. The other tests are not Perl-compatible (they use    the start of each test. The other tests are not Perl-compatible (they use
121    various PCRE-specific features or options).    various PCRE-specific features or options).
# Line 180  others are relatively new. Line 180  others are relatively new.
180    
181    * "Ends with literal string" - note that a single character doesn't gain much    * "Ends with literal string" - note that a single character doesn't gain much
182      over the existing "required byte" (reqbyte) feature that just remembers one      over the existing "required byte" (reqbyte) feature that just remembers one
183      byte.      data unit.
184    
185    * These probably need to go in pcre_study():    * These probably need to go in pcre_study():
186    
187      o Remember an initial string rather than just 1 char?      o Remember an initial string rather than just 1 char?
188    
189      o A required byte from alternatives - not just the last char, but an      o A required data unit from alternatives - not just the last unit, but an
190        earlier one if common to all alternatives.        earlier one if common to all alternatives.
191    
192      o Friedl contains other ideas.      o Friedl contains other ideas.
# Line 206  others are relatively new. Line 206  others are relatively new.
206    
207  . Perl 6 will be a revolution. Is it a revolution too far for PCRE?  . Perl 6 will be a revolution. Is it a revolution too far for PCRE?
208    
 . Unicode  
   
   * There has been a request for direct support of 16-bit characters and  
     UTF-16 (Bugzilla #1049). However, since Unicode is moving beyond purely  
     16-bit characters, is this worth it at all? One possible way of handling  
     16-bit characters would be to "load" them in the same way that UTF-8  
     characters are loaded. Another possibility is to provide a set of  
     translation functions, and build an index during translation so that the  
     returned offsets can automatically be translated (using the index) after a  
     match.  
   
   * A different approach to Unicode might be to use a typedef to do everything  
     in unsigned shorts instead of unsigned chars. Actually, we'd have to have a  
     new typedef to distinguish data from bits of compiled pattern that are in  
     bytes, I think. There would need to be conversion functions in and out. I  
     don't think this is particularly trivial - and anyway, Unicode now has  
     characters that need more than 16 bits, so is this at all sensible? I  
     suspect not.  
   
209  . Allow errorptr and erroroffset to be NULL. I don't like this idea.  . Allow errorptr and erroroffset to be NULL. I don't like this idea.
210    
211  . Line endings:  . Line endings:
# Line 250  others are relatively new. Line 231  others are relatively new.
231    support --outputfile=name.    support --outputfile=name.
232    
233  . Consider making UTF-8 and UCP the default for PCRE n.0 for some n > 8.  . Consider making UTF-8 and UCP the default for PCRE n.0 for some n > 8.
234      (And now presumably UTF-16 and UCP for the 16-bit library.)
235    
236  . Add a user pointer to pcre_malloc/free functions -- some option would be  . Add a user pointer to pcre_malloc/free functions -- some option would be
237    needed to retain backward compatibility.    needed to retain backward compatibility.
# Line 264  others are relatively new. Line 246  others are relatively new.
246  . Wild thought: the ability to compile from PCRE's internal byte code to a real  . Wild thought: the ability to compile from PCRE's internal byte code to a real
247    FSM and a very fast (third) matcher to process the result. There would be    FSM and a very fast (third) matcher to process the result. There would be
248    even more restrictions than for pcre_dfa_exec(), however. This is not easy.    even more restrictions than for pcre_dfa_exec(), however. This is not easy.
249      This is probably obsolete now that we have the JIT support.
250    
251  . Should pcretest have some private locale data, to avoid relying on the  . Should pcretest have some private locale data, to avoid relying on the
252    available locales for the test data, since different OS have different ideas?    available locales for the test data, since different OS have different ideas?
# Line 287  others are relatively new. Line 270  others are relatively new.
270    
271  . A user is going to supply a patch to generalize the API for user-specific  . A user is going to supply a patch to generalize the API for user-specific
272    memory allocation so that it is more flexible in threaded environments. This    memory allocation so that it is more flexible in threaded environments. This
273    was promised a long time ago, and never appeared...    was promised a long time ago, and never appeared. However, this is a live
274      issue not only for threaded environments, but for libraries that use PCRE and
275  . Write a function that generates random matching strings for a compiled regex.    want not to be beholden to their caller's memory allocation.
276    
277  . Write a wrapper to maintain a structure with specified runtime parameters,  . Write a wrapper to maintain a structure with specified runtime parameters,
278    such as recurse limit, and pass these to PCRE each time it is called. Also    such as recurse limit, and pass these to PCRE each time it is called. Also
279    maybe malloc and free. A user sent a prototype.    maybe malloc and free. A user sent a prototype. This relates the the previous
280      item.
281    
282    . Write a function that generates random matching strings for a compiled regex.
283    
284  . Pcregrep: an option to specify the output line separator, either as a string  . Pcregrep: an option to specify the output line separator, either as a string
285    or select from a fixed list. This is not dead easy, because at the moment it    or select from a fixed list. This is not dead easy, because at the moment it
# Line 324  others are relatively new. Line 310  others are relatively new.
310  Philip Hazel  Philip Hazel
311  Email local part: ph10  Email local part: ph10
312  Email domain: cam.ac.uk  Email domain: cam.ac.uk
313  Last updated: 11 October 2011  Last updated: 14 January 2012
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