Using unicode from C interface of R

Hi ,

I am using C interface of R . If a unicode string is read , in what format
I could pass it back to R ?
I was trying to use the following

  tpStr = ( char *)val;
  SET_STRING_ELT(innerList  , 0, mkChar(tpStr));

It does not work .

If I pass it back from as RAW format to R , what package is there to read
it ? I mean package for interpreting RAW data .

On 14-01-21 5:41 PM, Sandip Nandi wrote:

Hi ,

I am using C interface of R . If a unicode string is read , in what
format
I could pass it back to R ?
I was trying to use the following

  tpStr = ( char *)val;
  SET_STRING_ELT(innerList  , 0, mkChar(tpStr));

It does not work .

If I pass it back from as RAW format to R , what package is there to read
it ? I mean package for interpreting RAW data .

There are a number of encodings for Unicode.  Most Unix systems use
UTF-8, Windows uses UTF-16 for some things, etc.

If your string is known to be in UTF-8 that's easiest:  just use
mkCharCE instead of mkChar, as described in Writing R Extensions.  If it
is in UTF-16 you might have more trouble because of possible embedded 0
bytes.  Translate to UTF-8 first using C facilities like
WideCharToMultibyte.