On Thu, 31 Jul 2008, Prof Brian Ripley wrote:
On Thu, 31 Jul 2008, Roger D. Peng wrote:
Are the functions 'R_Unserialize' and 'R_InitFileInPStream' allowed to
be used in R packages? I guess I'm just not clear on the implications
of this comment in 'Rinternals.h':
/* The connection interface is not yet available to packages. To
allow limited use of connection pointers this defines the opaque
pointer type. */
It applies to R_InitFile(In|Out)PStream only, and is conditionalized by
NEED_CONNECTION_PSTREAMS. You can't create a Rconnection pointer in your own
C code in a public way. (The 'yet' has been there for nearly 7 years.)
Sorry the cut-and-paste went wrong: R_InitConn(In|Out)PStream only.
So what you are asking about is outside the conditional for that comment.
I have a function in the 'filehash' package that unserializes a bunch
of objects from a file and it seems to run much faster in C than in R.
But I don't want to release something that uses a non-public
function/interface.
Thanks,
-roger
--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
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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
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--
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
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