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