#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 |