Getting hold of a package's environment from C code

Seth Falcon <sfalcon at fhcrc.org> writes:

Perhaps:

R_FindNamespace(mkString(where))

Sorry, this won't help you for package-level code as this function is
part of the internal use only API.  It would be nice to have access to
it or a similar function from C in package code.

Hmm, it is declared in Rinternals.h, which is the public header for 
manipulating R objects at C level.  As such it is available to packages, 
but as it is not documented in 'Writing R Extensions' it is subject to 
change.

R_FindNamespace is essentially the same code as Duncan M provided, so it 
is a pretty simple function.  (It still contains a test that namespaces 
are supported, and that seems long overdue for removal.)

Brian D. Ripley,                  ripley at stats.ox.ac.uk
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