RE: svn commit: r40378 - in trunk/subversion: include libsvn_subr tests/libsvn_subr

> -----Original Message-----
> From: Hyrum K. Wright [mailto:[email protected]]
> Sent: donderdag 5 november 2009 5:00
> To: svn-lmwclWVctOZK/[email protected]
> Subject: svn commit: r40378 - in trunk/subversion: include libsvn_subr
> tests/libsvn_subr
> 
> Author: hwright
> Date: Wed Nov  4 20:00:08 2009
> New Revision: 40378
> 
> Log:
> Add a duplication facility to our stream toolbox.  Along the lines of
> the tee(1), the new svn_stream_tee() function returns a stream which,
> when
> written to, writes to both of the underlying streams.  This allows
> writing
> two files simultaneously, or writing a file while also pushing content
> across the network.
> 
> This isn't used directly by this commit, but I envision a couple of
> uses down
> the road.  In any case, it's a potentially useful tool, and a nice
> exercise while stuck in an aluminum tube.
> 
> * subversion/libsvn_subr/stream.c
>   (baton_tee, write_handler_tee, svn_stream_tee): New.

I think it would be useful to add a close handler, to allow closing the inner streams via the outer stream.

In libsvn_wc/adm_crawler.c there is a variant of this stream code. It writes all bytes that are read from another stream. (Search for copying_stream). It would be nice if we could combine these into one generic feature. (But currently I don't see how)

	Bert

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