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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/archive/iterators/mb_from_wchar.hpp')
-rw-r--r-- | src/third_party/boost-1.60.0/boost/archive/iterators/mb_from_wchar.hpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/archive/iterators/mb_from_wchar.hpp b/src/third_party/boost-1.60.0/boost/archive/iterators/mb_from_wchar.hpp new file mode 100644 index 00000000000..d76eb3e2d26 --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/archive/iterators/mb_from_wchar.hpp @@ -0,0 +1,133 @@ +#ifndef BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP +#define BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP + +// MS compatible compilers support #pragma once +#if defined(_MSC_VER) +# pragma once +#endif + +/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 +// mb_from_wchar.hpp + +// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . +// Use, modification and distribution is subject to the Boost Software +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +// See http://www.boost.org for updates, documentation, and revision history. + +#include <boost/assert.hpp> +#include <cstddef> // size_t +#include <cwchar> // for mbstate_t and wcrtomb() + +#include <boost/config.hpp> +#if defined(BOOST_NO_STDC_NAMESPACE) +namespace std{ + using ::size_t; + using ::mbstate_t; + using ::wcrtomb; +} // namespace std +#endif + +#include <boost/iterator/iterator_adaptor.hpp> + +namespace boost { +namespace archive { +namespace iterators { + +/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 +// class used by text archives to translate wide strings and to char +// strings of the currently selected locale +template<class Base> // the input iterator +class mb_from_wchar + : public boost::iterator_adaptor< + mb_from_wchar<Base>, + Base, + wchar_t, + single_pass_traversal_tag, + char + > +{ + friend class boost::iterator_core_access; + + typedef typename boost::iterator_adaptor< + mb_from_wchar<Base>, + Base, + wchar_t, + single_pass_traversal_tag, + char + > super_t; + + typedef mb_from_wchar<Base> this_t; + + char dereference_impl() { + if(! m_full){ + fill(); + m_full = true; + } + return m_buffer[m_bnext]; + } + char dereference() const { + return (const_cast<this_t *>(this))->dereference_impl(); + } + + // test for iterator equality + bool equal(const mb_from_wchar<Base> & rhs) const { + // once the value is filled, the base_reference has been incremented + // so don't permit comparison anymore. + return + 0 == m_bend + && 0 == m_bnext + && this->base_reference() == rhs.base_reference() + ; + } + + void fill(){ + std::mbstate_t mbs; + std::wcrtomb(0, 0, &mbs); + wchar_t value = * this->base_reference(); + m_bend = std::wcrtomb(m_buffer, value, &mbs); + BOOST_ASSERT(-1 != m_bend); + BOOST_ASSERT((std::size_t)m_bend <= sizeof(m_buffer)); + BOOST_ASSERT(m_bend > 0); + m_bnext = 0; + } + + void increment(){ + if(++m_bnext < m_bend) + return; + m_bend = + m_bnext = 0; + ++(this->base_reference()); + m_full = false; + } + + // buffer to handle pending characters + int m_bend; + int m_bnext; + char m_buffer[9]; + bool m_full; + +public: + // make composible buy using templated constructor + template<class T> + mb_from_wchar(T start) : + super_t(Base(static_cast< T >(start))), + m_bend(0), + m_bnext(0), + m_full(false) + {} + // intel 7.1 doesn't like default copy constructor + mb_from_wchar(const mb_from_wchar & rhs) : + super_t(rhs.base_reference()), + m_bend(rhs.m_bend), + m_bnext(rhs.m_bnext), + m_full(rhs.m_full) + {} +}; + +} // namespace iterators +} // namespace archive +} // namespace boost + +#endif // BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP |