You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
165 lines
4.7 KiB
165 lines
4.7 KiB
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) |
|
// (C) Copyright 2003-2007 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. |
|
|
|
#ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED |
|
#define BOOST_IOSTREAMS_WRITE_HPP_INCLUDED |
|
|
|
#if defined(_MSC_VER) |
|
# pragma once |
|
#endif |
|
|
|
#include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC. |
|
#include <boost/detail/workaround.hpp> |
|
#include <boost/iostreams/categories.hpp> |
|
#include <boost/iostreams/detail/char_traits.hpp> |
|
#include <boost/iostreams/detail/dispatch.hpp> |
|
#include <boost/iostreams/detail/ios.hpp> // streamsize. |
|
#include <boost/iostreams/detail/streambuf.hpp> |
|
#include <boost/iostreams/detail/wrap_unwrap.hpp> |
|
#include <boost/iostreams/operations_fwd.hpp> |
|
#include <boost/iostreams/traits.hpp> |
|
#include <boost/mpl/if.hpp> |
|
|
|
// Must come last. |
|
#include <boost/iostreams/detail/config/disable_warnings.hpp> |
|
|
|
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) |
|
{ return detail::write_device_impl<T>::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) |
|
{ return detail::write_device_impl<T>::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 ) |
|
{ return detail::write_filter_impl<T>::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> |
|
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()->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.rdbuf()->sputn(s, n); } |
|
}; |
|
|
|
template<> |
|
struct write_device_impl<streambuf_tag> { |
|
template<typename T> |
|
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> |
|
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, 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, 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. |
|
|
|
#include <boost/iostreams/detail/config/enable_warnings.hpp> |
|
|
|
#endif // #ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED
|
|
|