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129 lines
3.4 KiB
129 lines
3.4 KiB
#ifndef BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP |
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#define BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP |
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// MS compatible compilers support #pragma once |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
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// wchar_from_mb.hpp |
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// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . |
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// Use, modification and distribution is subject to the Boost Software |
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// See http://www.boost.org for updates, documentation, and revision history. |
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#include <boost/assert.hpp> |
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#include <cctype> |
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#include <cstddef> // size_t |
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#include <cstdlib> // mblen |
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#include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME |
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#if defined(BOOST_NO_STDC_NAMESPACE) |
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namespace std{ |
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using ::mblen; |
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using ::mbtowc; |
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} // namespace std |
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#endif |
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#include <boost/serialization/throw_exception.hpp> |
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#include <boost/serialization/pfto.hpp> |
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#include <boost/iterator/iterator_adaptor.hpp> |
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#include <boost/archive/iterators/dataflow_exception.hpp> |
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namespace boost { |
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namespace archive { |
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namespace iterators { |
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
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// class used by text archives to translate char strings to wchar_t |
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// strings of the currently selected locale |
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template<class Base> |
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class wchar_from_mb |
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: public boost::iterator_adaptor< |
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wchar_from_mb<Base>, |
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Base, |
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wchar_t, |
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single_pass_traversal_tag, |
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wchar_t |
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> |
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{ |
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friend class boost::iterator_core_access; |
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typedef BOOST_DEDUCED_TYPENAME boost::iterator_adaptor< |
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wchar_from_mb<Base>, |
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Base, |
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wchar_t, |
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single_pass_traversal_tag, |
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wchar_t |
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> super_t; |
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typedef wchar_from_mb<Base> this_t; |
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wchar_t drain(); |
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wchar_t dereference_impl() { |
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if(! m_full){ |
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m_current_value = drain(); |
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m_full = true; |
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} |
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return m_current_value; |
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} |
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wchar_t dereference() const { |
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return const_cast<this_t *>(this)->dereference_impl(); |
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} |
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void increment(){ |
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dereference_impl(); |
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m_full = false; |
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++(this->base_reference()); |
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}; |
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wchar_t m_current_value; |
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bool m_full; |
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public: |
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// make composible buy using templated constructor |
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template<class T> |
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wchar_from_mb(BOOST_PFTO_WRAPPER(T) start) : |
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super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start)))), |
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m_full(false) |
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{} |
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// intel 7.1 doesn't like default copy constructor |
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wchar_from_mb(const wchar_from_mb & rhs) : |
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super_t(rhs.base_reference()), |
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m_full(rhs.m_full) |
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{} |
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}; |
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template<class Base> |
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wchar_t wchar_from_mb<Base>::drain(){ |
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char buffer[9]; |
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char * bptr = buffer; |
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char val; |
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for(std::size_t i = 0; i++ < (unsigned)MB_CUR_MAX;){ |
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val = * this->base_reference(); |
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*bptr++ = val; |
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int result = std::mblen(buffer, i); |
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if(-1 != result) |
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break; |
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++(this->base_reference()); |
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} |
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wchar_t retval; |
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int result = std::mbtowc(& retval, buffer, MB_CUR_MAX); |
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if(0 >= result) |
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boost::serialization::throw_exception(iterators::dataflow_exception( |
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iterators::dataflow_exception::invalid_conversion |
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)); |
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return retval; |
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} |
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} // namespace iterators |
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} // namespace archive |
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} // namespace boost |
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#endif // BOOST_ARCHIVE_ITERATORS_WCHAR_FROM_MB_HPP
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