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#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
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