On Fri, 26 Aug 2005, James Bullard wrote: > Hello all, I am writing an R interface to some C++ files which make use > of std::wstring classes for internationalization. Previously (when I > wanted to make R strings from C++ std::strings), I would do something > like this to construct a string in R from the results of the parse. > > SET_VECTOR_ELT(vals, i++, mkString(header.GetHeader().c_str()));
That creates a list of one-element character vectors. It would be more usual to do SET_STRING_ELT(vals, i++, mkChar(header.GetHeader().c_str())); > However, now the call header.GetHeader().c_str() returns a pointer to an > array of wchar_t's. I was going to use wcstombs() to convert the > wchar_t* to char*, but I wanted to see if there was a similar function > in R for the mkString function which I had initially used which deals > with wchar_ts as opposed to chars. No (nor an analogue of mkChar). R uses MBCS and not wchar_t internally (and Unix-alike systems do externally). There is no wchar_t internal R type (a much-debated design decision at the time). > Also, since I have no experience with the wctombs() function I wanted to > ask if anyone knew if this will handle the internationilzation issues > from within R. Did you mean wcstombs or wctomb (if the latter, wcrtomb is preferred)? There are tens of examples in the R sources for you to consult. Note that not all R platforms support wchar_t, hence this code is surrounded by #ifdef SUPPORT_MBCS macros (exported in Rconfig.h for package writers). -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
