Thanks for the response, Gregory. But I need a bit more help. So far I am using the test python code
from rpy import r r.print_(u'') r.print_(u' ') By inserting print statements into the RPy C code (rpymodule.c), I have determined that every time RPy accesses an R object, it goes through the C function Robj_call, which calls make_args, which in turn calls to_Robj. For some reason to_Robj thinks that the unicode string is a sequence, so PySequence_Check returns TRUE and thus seq_to_R(obj) gets called. The problem is that seq_to_R calls to_Robj, which causes an infinite loop and an eventual segfault. Interestingly, the empty unicode string does not cause a segfault, since it causes seq_to_R to return before calling to_Robj. I suppose the solution is to use the Python API's PyUnicode_Check function before PySequenceCheck (http://docs.python.org/api/unicodeObjects.html) and treat conversion of this type of data especially. As I see it, there are 2 options: 1. Convert the unicode string to normal string, and then pass it to R (lose unicode functionality). 2. Pass to R as Unicode -- I believe Python and R both support UCS2 -- is the translation straightforward? Case 2 is preferable, case 1 is more of a hack. I presume we will have to do something similar to what RPy does when PyString_Check works: PROTECT(robj=NEW_STRING(1)); SET_STRING_ELT(robj,0,COPY_TO_USER_STRING(PyString_AsString(obj))); But what are NEW_STRING, SET_STRING_ELT, and COPY_TO_USER_STRING defined as? I can't seem to find definitions of any of these. There is a PyUnicode_AsUnicode function in Python's C API, so we should be able to use that. I'm going to take a short break from this for a bit, but please email me any suggestions/ideas and what to do next. Toby Dylan Hocking -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Gregory Warnes Sent: Tuesday, October 16, 2007 6:20 PM To: RPy help, support and design discussion list Subject: Re: [Rpy] segfault on unicode string conversion I've been trying to make time to work on fixing all of the outstanding bugs. Other duties keep pulling me away. This should be a simple fix... On Oct 16, 2007, at 7:56PM , Toby Dylan Hocking wrote: > Hi all, > > I really need RPy to resolve this issue: > http://sourceforge.net/tracker/index.php? > func=detail&aid=1592811&group_id=48422&atid=453021 > > Basically, I have a python app that is using RPy to make some neat > graphics for a website, and some parameters are passed from Python > to R in > function arguments as unicode strings. This causes the python > interpreter > to segfault, presumably in seq_to_R in rpymodule.c (confirm or deny?) > > Is there any chance the dev team can fix this bug -- unicode > support for > rpy -- anytime soon? > > Sincerely, > Toby Dylan Hocking > http://www.ocf.berkeley.edu/~tdhock > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a > browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > rpy-list mailing list > rpy-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/rpy-list ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ rpy-list mailing list rpy-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rpy-list ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ rpy-list mailing list rpy-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rpy-list
