Chris@16: #ifndef BOOST_ARCHIVE_ITERATORS_ISTREAM_ITERATOR_HPP
Chris@16: #define BOOST_ARCHIVE_ITERATORS_ISTREAM_ITERATOR_HPP
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // istream_iterator.hpp
Chris@16: 
Chris@16: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
Chris@16: // Use, modification and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org for updates, documentation, and revision history.
Chris@16: 
Chris@16: // note: this is a custom version of the standard istream_iterator.
Chris@16: // This is necessary as the standard version doesn't work as expected
Chris@16: // for wchar_t based streams on systems for which wchar_t not a true
Chris@16: // type but rather a synonym for some integer type.
Chris@16: 
Chris@16: #include <cstddef> // NULL
Chris@16: #include <istream>
Chris@16: #include <boost/iterator/iterator_facade.hpp>
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace archive {
Chris@16: namespace iterators {
Chris@16: 
Chris@16: // given a type, make an input iterator based on a pointer to that type
Chris@16: template<class Elem = char>
Chris@16: class istream_iterator :  
Chris@16:     public boost::iterator_facade<
Chris@16:         istream_iterator<Elem>,
Chris@16:         Elem,
Chris@16:         std::input_iterator_tag,
Chris@16:         Elem
Chris@16:     >
Chris@16: {
Chris@16:     friend class boost::iterator_core_access;
Chris@16:     typedef istream_iterator this_t ;
Chris@101:     typedef typename boost::iterator_facade<
Chris@16:         istream_iterator<Elem>,
Chris@16:         Elem,
Chris@16:         std::input_iterator_tag,
Chris@16:         Elem
Chris@16:     > super_t;
Chris@101:     typedef typename std::basic_istream<Elem> istream_type;
Chris@16:  
Chris@16:     bool equal(const this_t & rhs) const {
Chris@16:         // note: only  works for comparison against end of stream
Chris@16:         return m_istream == rhs.m_istream;
Chris@16:     }
Chris@16: 
Chris@16: /*
Chris@16:     //Access the value referred to 
Chris@16:     Elem dereference() const {
Chris@16:         return m_current_value;
Chris@16:     }
Chris@16: 
Chris@16:     void increment(){
Chris@16:         if(NULL != m_istream){
Chris@16:             m_current_value = static_cast<Elem>(m_istream->get());
Chris@16:             if(! m_istream->good()){
Chris@16:                 const_cast<this_t *>(this)->m_istream = NULL;
Chris@16:             }
Chris@16:         }
Chris@16:     }
Chris@16: */
Chris@16:     //Access the value referred to 
Chris@16:     Elem dereference() const {
Chris@16:         return m_istream->peek();
Chris@16:     }
Chris@16: 
Chris@16:     void increment(){
Chris@16:         if(NULL != m_istream){
Chris@16:             m_istream->ignore(1);
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16:     istream_type *m_istream;
Chris@16:     Elem m_current_value;
Chris@16: public:
Chris@16:     istream_iterator(istream_type & is) :
Chris@16:         m_istream(& is)
Chris@16:     {
Chris@16:         //increment();
Chris@16:     }
Chris@16: 
Chris@16:     istream_iterator() :
Chris@16:         m_istream(NULL)
Chris@16:     {}
Chris@16: 
Chris@16:     istream_iterator(const istream_iterator<Elem> & rhs) :
Chris@16:         m_istream(rhs.m_istream),
Chris@16:         m_current_value(rhs.m_current_value)
Chris@16:     {}
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: } // namespace iterators
Chris@16: } // namespace archive
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_ARCHIVE_ITERATORS_ISTREAM_ITERATOR_HPP