[Rcpp-devel] Calling an internal do_* C level function

Mark Fredrickson mark.m.fredrickson at gmail.com
Mon Oct 14 19:33:50 CEST 2013


Hello,

Does anyone have an example of calling into C level functions that would be
called with .Internal() in R?

Specifically, I'd like to call do_rank, as defined in:

http://svn.r-project.org/R/trunk/src/main/sort.c

These functions have an unusual signature, and I'm not sure what
headers/linker directives I would need to include to get access to this
function.

I am aware that I could call the R level rank() function, but I'm trying to
avoid the performance penalty.

Thanks,
-Mark
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