Chris@16: #ifndef BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
Chris@16: #define BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_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: // mb_from_wchar.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 <cstddef> // size_t
Chris@16: #include <cstdlib> // for wctomb()
Chris@16: 
Chris@101: #include <boost/config.hpp>
Chris@16: #if defined(BOOST_NO_STDC_NAMESPACE)
Chris@16: namespace std{ 
Chris@16:     using ::size_t; 
Chris@16:     using ::wctomb;
Chris@16: } // namespace std
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/serialization/pfto.hpp>
Chris@16: #include <boost/iterator/iterator_adaptor.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 wide strings and to char
Chris@16: // strings of the currently selected locale
Chris@16: template<class Base>    // the input iterator
Chris@16: class mb_from_wchar
Chris@16:     : public boost::iterator_adaptor<
Chris@16:         mb_from_wchar<Base>, 
Chris@16:         Base, 
Chris@16:         wchar_t,
Chris@16:         single_pass_traversal_tag,
Chris@16:         char
Chris@16:     >
Chris@16: {
Chris@16:     friend class boost::iterator_core_access;
Chris@16: 
Chris@101:     typedef typename boost::iterator_adaptor<
Chris@16:         mb_from_wchar<Base>, 
Chris@16:         Base, 
Chris@16:         wchar_t,
Chris@16:         single_pass_traversal_tag,
Chris@16:         char
Chris@16:     > super_t;
Chris@16: 
Chris@16:     typedef mb_from_wchar<Base> this_t;
Chris@16: 
Chris@16:     char dereference_impl() {
Chris@16:         if(! m_full){
Chris@16:             fill();
Chris@16:             m_full = true;
Chris@16:         }
Chris@16:         return m_buffer[m_bnext];
Chris@16:     }
Chris@16:     char dereference() const {
Chris@16:         return (const_cast<this_t *>(this))->dereference_impl();
Chris@16:     }
Chris@16: 
Chris@16:     // test for iterator equality
Chris@16:     bool equal(const mb_from_wchar<Base> & rhs) const {
Chris@16:         // once the value is filled, the base_reference has been incremented
Chris@16:         // so don't permit comparison anymore.
Chris@16:         return 
Chris@16:             0 == m_bend
Chris@16:             && 0 == m_bnext
Chris@16:             && this->base_reference() == rhs.base_reference()
Chris@16:         ;
Chris@16:     }
Chris@16: 
Chris@16:     void fill(){
Chris@16:         wchar_t value = * this->base_reference();
Chris@16:         #if (defined(__MINGW32__) && ((__MINGW32_MAJOR_VERSION > 3) \
Chris@16:         || ((__MINGW32_MAJOR_VERSION == 3) && (__MINGW32_MINOR_VERSION >= 8))))
Chris@16:         m_bend = std::wcrtomb(m_buffer, value, 0);
Chris@16:         #else
Chris@16:         m_bend = std::wctomb(m_buffer, value);
Chris@16:         #endif
Chris@16:         BOOST_ASSERT(-1 != m_bend);
Chris@16:         BOOST_ASSERT((std::size_t)m_bend <= sizeof(m_buffer));
Chris@16:         BOOST_ASSERT(m_bend > 0);
Chris@16:         m_bnext = 0;
Chris@16:     }
Chris@16: 
Chris@16:     void increment(){
Chris@16:         if(++m_bnext < m_bend)
Chris@16:             return;
Chris@16:         m_bend = 
Chris@16:         m_bnext = 0;
Chris@16:         ++(this->base_reference());
Chris@16:         m_full = false;
Chris@16:     }
Chris@16: 
Chris@16:     // buffer to handle pending characters
Chris@16:     int m_bend;
Chris@16:     int m_bnext;
Chris@16:     char m_buffer[9];
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:     mb_from_wchar(BOOST_PFTO_WRAPPER(T) start) :
Chris@16:         super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start)))),
Chris@16:         m_bend(0),
Chris@16:         m_bnext(0),
Chris@16:         m_full(false)
Chris@16:     {}
Chris@16:     // intel 7.1 doesn't like default copy constructor
Chris@16:     mb_from_wchar(const mb_from_wchar & rhs) : 
Chris@16:         super_t(rhs.base_reference()),
Chris@16:         m_bend(rhs.m_bend),
Chris@16:         m_bnext(rhs.m_bnext),
Chris@16:         m_full(rhs.m_full)
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_MB_FROM_WCHAR_HPP