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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2005-2007 Jonathan Turkanis
// Distributed under 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/libs/iostreams for documentation.
namespace boost { namespace iostreams {
namespace detail {
template<typename T>
struct write_device_impl;
template<typename T>
struct write_filter_impl;
} // End namespace detail.
template<typename T>
bool put(T& t, typename char_type_of<T>::type c)
{
typedef typename detail::unwrapped_type<T>::type unwrapped;
return detail::write_device_impl<T>::inner<unwrapped>::put(detail::unwrap(t), c);
}
template<typename T>
inline std::streamsize write
(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
{
typedef typename detail::unwrapped_type<T>::type unwrapped;
return detail::write_device_impl<T>::inner<unwrapped>::write(detail::unwrap(t), s, n);
}
template<typename T, typename Sink>
inline std::streamsize
write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
std::streamsize n )
{
typedef typename detail::unwrapped_type<T>::type unwrapped;
return detail::write_filter_impl<T>::inner<unwrapped>::write(detail::unwrap(t), snk, s, n);
}
namespace detail {
//------------------Definition of write_device_impl---------------------------//
template<typename T>
struct write_device_impl
: mpl::if_<
is_custom<T>,
operations<T>,
write_device_impl<
BOOST_DEDUCED_TYPENAME
dispatch<
T, ostream_tag, streambuf_tag, output
>::type
>
>::type
{ };
template<>
struct write_device_impl<ostream_tag> {
template<typename T>
struct inner {
static bool put(T& t, typename char_type_of<T>::type c)
{
typedef typename char_type_of<T>::type char_type;
typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type) traits_type;
return !traits_type::eq_int_type( t.rdbuf()->s.sputc(),
traits_type::eof() );
}
static std::streamsize write
(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
{ return t.rdbuf()->sputn(s, n); }
};
};
template<>
struct write_device_impl<streambuf_tag> {
template<typename T>
struct inner {
static bool put(T& t, typename char_type_of<T>::type c)
{
typedef typename char_type_of<T>::type char_type;
typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type) traits_type;
return !traits_type::eq_int_type(t.sputc(c), traits_type::eof());
}
template<typename T>
static std::streamsize write
(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
{ return t.sputn(s, n); }
};
};
template<>
struct write_device_impl<output> {
template<typename T>
struct inner {
static bool put(T& t, typename char_type_of<T>::type c)
{ return t.write(&c, 1) == 1; }
template<typename T>
static std::streamsize
write(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
{ return t.write(s, n); }
};
};
//------------------Definition of write_filter_impl---------------------------//
template<typename T>
struct write_filter_impl
: mpl::if_<
is_custom<T>,
operations<T>,
write_filter_impl<
BOOST_DEDUCED_TYPENAME
dispatch<
T, multichar_tag, any_tag
>::type
>
>::type
{ };
template<>
struct write_filter_impl<multichar_tag> {
template<typename T>
struct inner {
template<typename Sink>
static std::streamsize
write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
std::streamsize n )
{ return t.write(snk, s, n); }
};
};
template<>
struct write_filter_impl<any_tag> {
template<typename T>
struct inner {
template<typename Sink>
static std::streamsize
write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
std::streamsize n )
{
for (std::streamsize off = 0; off < n; ++off)
if (!t.put(snk, s[off]))
return off;
return n;
}
};
};
} // End namespace detail.
} } // End namespaces iostreams, boost.
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