Chris@16: #ifndef BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP
Chris@16: #define BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_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: // wchar_from_mb.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: #include <boost/assert.hpp>
Chris@16: #include <cctype>
Chris@16: #include <cstddef> // size_t
Chris@16: #include <cstdlib> // mblen
Chris@16: 
Chris@101: #include <boost/config.hpp>
Chris@16: #if defined(BOOST_NO_STDC_NAMESPACE)
Chris@16: namespace std{ 
Chris@16:     using ::mblen; 
Chris@16:     using ::mbtowc; 
Chris@16: } // namespace std
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/serialization/throw_exception.hpp>
Chris@16: #include <boost/serialization/pfto.hpp>
Chris@16: 
Chris@16: #include <boost/iterator/iterator_adaptor.hpp>
Chris@16: #include <boost/archive/iterators/dataflow_exception.hpp>
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace archive {
Chris@16: namespace iterators {
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // class used by text archives to translate char strings to wchar_t
Chris@16: // strings of the currently selected locale
Chris@16: template<class Base>
Chris@16: class wchar_from_mb 
Chris@16:     : public boost::iterator_adaptor<
Chris@16:         wchar_from_mb<Base>, 
Chris@16:         Base, 
Chris@16:         wchar_t,
Chris@16:         single_pass_traversal_tag,
Chris@16:         wchar_t
Chris@16:     >
Chris@16: {
Chris@16:     friend class boost::iterator_core_access;
Chris@101:     typedef typename boost::iterator_adaptor<
Chris@16:         wchar_from_mb<Base>, 
Chris@16:         Base, 
Chris@16:         wchar_t,
Chris@16:         single_pass_traversal_tag,
Chris@16:         wchar_t
Chris@16:     > super_t;
Chris@16: 
Chris@16:     typedef wchar_from_mb<Base> this_t;
Chris@16: 
Chris@16:     wchar_t drain();
Chris@16: 
Chris@16:     wchar_t dereference_impl() {
Chris@16:         if(! m_full){
Chris@16:             m_current_value = drain();
Chris@16:             m_full = true;
Chris@16:         }
Chris@16:         return m_current_value;
Chris@16:     }
Chris@16: 
Chris@16:     wchar_t dereference() const {
Chris@16:         return const_cast<this_t *>(this)->dereference_impl();
Chris@16:     }
Chris@16: 
Chris@16:     void increment(){
Chris@16:         dereference_impl();
Chris@16:         m_full = false;
Chris@16:         ++(this->base_reference());
Chris@16:     };
Chris@16: 
Chris@16:     wchar_t m_current_value;
Chris@16:     bool m_full;
Chris@16: 
Chris@16: public:
Chris@16:     // make composible buy using templated constructor
Chris@16:     template<class T>
Chris@16:     wchar_from_mb(BOOST_PFTO_WRAPPER(T) start) : 
Chris@16:         super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start)))),
Chris@16:         m_full(false)
Chris@16:     {}
Chris@16:     // intel 7.1 doesn't like default copy constructor
Chris@16:     wchar_from_mb(const wchar_from_mb & rhs) : 
Chris@16:         super_t(rhs.base_reference()),
Chris@16:         m_full(rhs.m_full)
Chris@16:     {}
Chris@16: };
Chris@16: 
Chris@16: template<class Base>
Chris@16: wchar_t wchar_from_mb<Base>::drain(){
Chris@16:     char buffer[9];
Chris@16:     char * bptr = buffer;
Chris@16:     char val;
Chris@16:     for(std::size_t i = 0; i++ < (unsigned)MB_CUR_MAX;){
Chris@16:         val = * this->base_reference();
Chris@16:         *bptr++ = val;
Chris@16:         int result = std::mblen(buffer, i);
Chris@16:         if(-1 != result)
Chris@16:             break;
Chris@16:         ++(this->base_reference());
Chris@16:     }
Chris@16:     wchar_t retval;
Chris@16:     int result = std::mbtowc(& retval, buffer, MB_CUR_MAX);
Chris@16:     if(0 >= result)
Chris@16:         boost::serialization::throw_exception(iterators::dataflow_exception(
Chris@16:             iterators::dataflow_exception::invalid_conversion
Chris@16:         ));
Chris@16:     return retval;
Chris@16: }
Chris@16: 
Chris@16: } // namespace iterators
Chris@16: } // namespace archive
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP