| #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 <cassert> |
| |
| #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" |
| "+/"; |
| 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 |