Re: [boost] seek issue with boost::iostreams::stream

From: Jonathan Turkanis (turkanis_at_[hidden])
Date: 2008-01-05 16:05:12

Hi Steve,

Steve Nutt wrote:
 > I've created a device with the boost::iostreams::dual_seekable
 > category to use with the boost::iostreams::stream class, but I'm
 > having trouble implementing seek.

 > When I call seekp on the stream, seek on my device is called with a
 > which (openmode) of both BOOST_IOS::in and BOOST_IOS::out.  I would
 > have expected for a call to seekp the which parameter in the seek
 > call on my device would be BOOST_IOS::out, and calling seekg would
 > set which to BOOST_IOS::in.

 > The following code in
 > boost\iostream\detail\streambuf\indirect_streambuf.hpp ignores the
 > which argument passed and passes on through both in and out.

 > Is this correct, and if so how do I implement seeking when using a
 > dual head device?

This is almost certainly a bug. I have created a ticket 
(http://svn.boost.org/trac/boost/ticket/1551) and will make sure it is 
fixed for 1.36.

 > Many thanks,

 > Steve Nutt

-- 
Jonathan Turkanis
CodeRage
http://www.coderage.com