ceph/src/boost/libs/serialization/include/boost/archive/iterators/ostream_iterator.hpp

   1 #ifndef BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP
   2 #define BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // ostream_iterator.hpp
  11
  12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 // note: this is a custom version of the standard ostream_iterator.
  20 // This is necessary as the standard version doesn't work as expected
  21 // for wchar_t based streams on systems for which wchar_t not a true
  22 // type but rather a synonym for some integer type.
  23
  24 #include <ostream>
  25 #include <boost/iterator/iterator_facade.hpp>
  26
  27 namespace boost {
  28 namespace archive {
  29 namespace iterators {
  30
  31 // given a type, make an input iterator based on a pointer to that type
  32 template<class Elem>
  33 class ostream_iterator :
  34     public boost::iterator_facade<
  35         ostream_iterator<Elem>,
  36         Elem,
  37         std::output_iterator_tag,
  38         ostream_iterator<Elem> &
  39     >
  40 {
  41     friend class boost::iterator_core_access;
  42     typedef ostream_iterator this_t ;
  43     typedef Elem char_type;
  44     typedef std::basic_ostream<char_type> ostream_type;
  45
  46     //emulate the behavior of std::ostream
  47     ostream_iterator & dereference() const {
  48         return const_cast<ostream_iterator &>(*this);
  49     }
  50     bool equal(const this_t & rhs) const {
  51         return m_ostream == rhs.m_ostream;
  52     }
  53     void increment(){}
  54 protected:
  55     ostream_type *m_ostream;
  56     void put_val(char_type e){
  57         if(NULL != m_ostream){
  58             m_ostream->put(e);
  59             if(! m_ostream->good())
  60                 m_ostream = NULL;
  61         }
  62     }
  63 public:
  64     this_t & operator=(char_type c){
  65         put_val(c);
  66         return *this;
  67     }
  68     ostream_iterator(ostream_type & os) :
  69         m_ostream (& os)
  70     {}
  71     ostream_iterator() :
  72         m_ostream (NULL)
  73     {}
  74     ostream_iterator(const ostream_iterator & rhs) :
  75         m_ostream (rhs.m_ostream)
  76     {}
  77 };
  78
  79 } // namespace iterators
  80 } // namespace archive
  81 } // namespace boost
  82
  83 #endif // BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP