[Boost-bugs] [Boost C++ Libraries] #1070: [iostreams]boost\iostreams\copy.hpp line80 copy_impl

Subject: [Boost-bugs] [Boost C++ Libraries] #1070: [iostreams]boost\iostreams\copy.hpp line80 copy_impl
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-06-30 14:40:23

#1070: [iostreams]boost\iostreams\copy.hpp line80 copy_impl
--------------------------------+-------------------------------------------
 Reporter:  qbowater_at_[hidden]  |        Type:  Bugs            
   Status:  new                 |   Milestone:  To Be Determined
Component:  None                |     Version:  release 1.34.0  
 Severity:  Showstopper         |    Keywords:                  
--------------------------------+-------------------------------------------
 boost\iostreams\copy.hpp  line 80 - line 100
 {{{
 #!cpp
 template<typename Source, typename Sink>
 std::streamsize copy_impl( Source& src, Sink& snk,
                             std::streamsize buffer_size,
                             mpl::false_, mpl::true_ )
 {   // Copy from an indirect Source to a direct Sink.
      using namespace std;
      typedef typename char_type_of<Source>::type  char_type;
      typedef pair<char_type*, char_type*>         pair_type;
      detail::basic_buffer<char_type>  buf(buffer_size);
      pair_type                        p = snk.output_sequence();
      streamsize                       total = 0;
      bool                             done  = false;
      while (!done) {
          streamsize amt;
          done = (amt = iostreams::read(src, buf.data(), buffer_size)) ==
 -1;
          std::copy(buf.data(), buf.data() + amt, p.first + total);
          if (amt != -1)
              total += amt;
      }
      return total;
 }
 }}}
 When "iostreams::read" return -1 ,amt equal -1,it will assert in std::copy
 because iterator last < first.

 Please read http://article.gmane.org/gmane.comp.lib.boost.devel/161764 for
 detail.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1070>
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