ceph/src/boost/boost/spirit/home/karma/stream/detail/iterator_sink.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boist.org/LICENSE_1_0.txt)
   5
   6 #if !defined(BOOST_SPIRIT_ITERATOR_SINK_MAY_27_2007_0133PM)
   7 #define BOOST_SPIRIT_ITERATOR_SINK_MAY_27_2007_0133PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/iostreams/stream.hpp>
  14 #include <boost/spirit/home/karma/detail/generate_to.hpp>
  15
  16 ///////////////////////////////////////////////////////////////////////////////
  17 namespace boost { namespace spirit { namespace karma { namespace detail
  18 {
  19     ///////////////////////////////////////////////////////////////////////////
  20     template <
  21         typename OutputIterator, typename Char, typename CharEncoding
  22       , typename Tag
  23     >
  24     struct iterator_sink
  25     {
  26         typedef boost::iostreams::sink_tag category;
  27         typedef Char char_type;
  28
  29         iterator_sink (OutputIterator& sink_)
  30           : sink(sink_)
  31         {}
  32
  33         // Write up to n characters from the buffer s to the output sequence,
  34         // returning the number of characters written
  35         std::streamsize write (Char const* s, std::streamsize n)
  36         {
  37             std::streamsize bytes_written = 0;
  38             while (n--) {
  39                 if (!generate_to(sink, *s, CharEncoding(), Tag()))
  40                     break;
  41                 ++s; ++bytes_written;
  42             }
  43             return bytes_written;
  44         }
  45
  46         OutputIterator& sink;
  47
  48     private:
  49         // silence MSVC warning C4512: assignment operator could not be generated
  50         iterator_sink& operator= (iterator_sink const&);
  51     };
  52
  53 }}}}
  54
  55 #endif