#ifndef BOOST_ARCHIVE_ITERATORS_BASE64_FROM_BINARY_HPP #define BOOST_ARCHIVE_ITERATORS_BASE64_FROM_BINARY_HPP // MS compatible compilers support #pragma once #if defined(_MSC_VER) && (_MSC_VER >= 1020) # pragma once #endif /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 // base64_from_binary.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 <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME #if defined(BOOST_NO_STDC_NAMESPACE) namespace std{ using ::size_t; } // namespace std #endif #include <boost/serialization/pfto.hpp> #include <boost/iterator/transform_iterator.hpp> #include <boost/archive/iterators/dataflow_exception.hpp> namespace boost { namespace archive { namespace iterators { /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 // convert binary integers to base64 characters namespace detail { template<class CharType> struct from_6_bit { typedef CharType result_type; CharType operator()(CharType t) const{ const char * lookup_table = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz" "0123456789" "+/"; BOOST_ASSERT(t < 64); return lookup_table[static_cast<size_t>(t)]; } }; } // namespace detail // note: what we would like to do is // template<class Base, class CharType = BOOST_DEDUCED_TYPENAME Base::value_type> // typedef transform_iterator< // from_6_bit<CharType>, // transform_width<Base, 6, sizeof(Base::value_type) * 8, CharType> // > base64_from_binary; // but C++ won't accept this. Rather than using a "type generator" and // using a different syntax, make a derivation which should be equivalent. // // Another issue addressed here is that the transform_iterator doesn't have // a templated constructor. This makes it incompatible with the dataflow // ideal. This is also addressed here. //template<class Base, class CharType = BOOST_DEDUCED_TYPENAME Base::value_type> template< class Base, class CharType = BOOST_DEDUCED_TYPENAME boost::iterator_value<Base>::type > class base64_from_binary : public transform_iterator< detail::from_6_bit<CharType>, Base > { friend class boost::iterator_core_access; typedef transform_iterator< BOOST_DEDUCED_TYPENAME detail::from_6_bit<CharType>, Base > super_t; public: // make composible buy using templated constructor template<class T> base64_from_binary(BOOST_PFTO_WRAPPER(T) start) : super_t( Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start))), detail::from_6_bit<CharType>() ) {} // intel 7.1 doesn't like default copy constructor base64_from_binary(const base64_from_binary & rhs) : super_t( Base(rhs.base_reference()), detail::from_6_bit<CharType>() ) {} // base64_from_binary(){}; }; } // namespace iterators } // namespace archive } // namespace boost #endif // BOOST_ARCHIVE_ITERATORS_BASE64_FROM_BINARY_HPP