// (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. |