[Boost-bugs] [Boost C++ Libraries] #5619: zlib: Add support for additional flush mode

Subject: [Boost-bugs] [Boost C++ Libraries] #5619: zlib: Add support for additional flush mode
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-06-18 07:15:12

#5619: zlib: Add support for additional flush mode
-------------------------------------+--------------------------------------
 Reporter:  mb@…                     |       Owner:  turkanis 
     Type:  Feature Requests         |      Status:  new      
Milestone:  To Be Determined         |   Component:  iostreams
  Version:  Boost Development Trunk  |    Severity:  Problem  
 Keywords:                           |  
-------------------------------------+--------------------------------------
 The zlib filter uses Z_SYNC_FLUSH which is the most widely used flush
 mode. However SSH requires Z_PARTIAL_FLUSH. For further information please
 see the "Partial Flush" paragraph at: www.bolet.org/~pornin/deflate-
 flush.html

 It would be trivial to add the new flush mode:[[BR]]

 '''File: zlib.hpp'''[[BR]]

 Add [[BR]]
 BOOST_IOSTREAMS_DECL extern const int partial_flush;[[BR]]

 Add additional argument to zlib_params:[[BR]]

  zlib_params( [[BR]]

     int flush_mode = zlib::default_flush_mode[[BR]]


 add int flush_mode_ member to zlib_base[[BR]]


 init flush_mode_ member in zlib_base::do_init[[BR]]

 flush_mode_ = p.flush_mode;[[BR]]


 and in the filter function change the xinflate to:[[BR]]

     int result = xinflate(flush_mode_);[[BR]]


 '''File: zlib.cpp'''[[BR]]

 const int partial_flush  = Z_PARTIAL_FLUSH;[[BR]]

 const int default_flush_mode  = sync_flush;[[BR]]

 [[BR]]

 Please let me know if there is an interest for the diff files.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5619>
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