I've implemented an R Connections API for packages writers and those 
embedding R into other systems. The patch is here:

http://biostat.mc.vanderbilt.edu/twiki/pub/Main/RApacheProject/Conn-patch-R-devel-r39773.patch

and I've started an R wiki for discussion here:

http://wiki.r-project.org/rwiki/doku.php?id=developers:r_connections_api

Main points:

1) C code can create new connections and pass them back to R.

2) R code can utilize them just like existing connections.

3) C code can also utilize them.

3) stdin, stdout, and stderr connections can be replaced with something 
else.

Comments much appreciated,

Jeff
-- 
http://biostat.mc.vanderbilt.edu/JeffreyHorner

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