[R] How to hiding code for a package

[Gary Wong]

--- Spencer Graves <spencer.graves at pdf.com> wrote:

> Dear Gary Wong:
> 
> 	  Are you trying to defeat the GNU License?  If so,
> why not make it 
> available as an S-Plus library?  There, you don't
> have to provide the 
> source;  binary files will suffice.
> 
> 	  spencer graves
> 
> bogdan romocea wrote:
> 
> > There's something else you could try - since you
> can't hide the code,
> > obfuscate it. Hide the real thing in a large pile
> of useless,
> > complicated, awfully formatted code that would
> stop anyone except the
> > most desperate (including yourself, after a couple
> of weeks/months)
> > from trying to understand it. The best solution
> would be to compile
> > the code, but R is not there yet.
> > 
> > 
> > 
> >>-----Original Message-----
> >>From: Prof Brian Ripley
> [mailto:ripley at stats.ox.ac.uk] 
> >>Sent: Saturday, July 30, 2005 5:35 AM
> >>To: Gary Wong
> >>Cc: r-help at stat.math.ethz.ch
> >>Subject: Re: [R] How to hiding code for a package
> >>
> >>
> >>What you ask is impossible.  For a function to be
> callable it 
> >>has to be 
> >>locatable and hence can be printed.
> >>
> >>One possibility is to have a namespace, and
> something like
> >>
> >>foo <- function(...) foo_internal(...)
> >>
> >>where foo is exported but foo_internal is not. 
> Then foo_internal is 
> >>hidden from casual inspection, but it can be
> listed by cognescenti.
> >>
> >>Why do you want to do this?  Anyhone can read the
> source code of your 
> >>package, and any function which can be called can
> be 
> >>deparsed, possibly 
> >>after jumping through a few hoops.
> >>
> >>On Sat, 30 Jul 2005, Gary Wong wrote:
> >>
> >>
> >>>Hey everyone,
> >>>
> >>>I have made a package and wish to release it but
> >>>before then I have a problem. I have a few
> functions
> >>>in this package written in R that I wish to hide
> such
> >>>that after installation, someone can use say the
> >>>function >foo(parameters = "") but cannot do
> >foo.
> >>>Typing foo should not show the source code or at
> least
> >>>not all of it. Is there a way to do this ? I have
> >>>searched the mailing list and used google, and
> have
> >>>found something like "[R] Hiding internal package
> >>>functions for the doc. pkg-internal.Rd" but this
> seems
> >>>different since it seems that the keyword
> internal
> >>>just hides the function from showing in the index
> and
> >>>hides documentation, not the function itself. Can
> >>>someone help? Thanks
> >>
> >>-- 
> >>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
> >>
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> >>
> > 
> > 
> > ______________________________________________
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> -- 
> Spencer Graves, PhD
> Senior Development Engineer
> PDF Solutions, Inc.
> 333 West San Carlos Street Suite 700
> San Jose, CA 95110, USA
> 
> spencer.graves at pdf.com
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> Fax: 408-280-7915
> 
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