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.
254 lines
6.8 KiB
254 lines
6.8 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_CLOSE_HPP_INCLUDED
|
|
#define BOOST_IOSTREAMS_CLOSE_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/flush.hpp>
|
|
#include <boost/iostreams/detail/adapter/non_blocking_adapter.hpp>
|
|
#include <boost/iostreams/detail/ios.hpp> // BOOST_IOS
|
|
#include <boost/iostreams/detail/select.hpp>
|
|
#include <boost/iostreams/detail/wrap_unwrap.hpp>
|
|
#include <boost/iostreams/operations_fwd.hpp>
|
|
#include <boost/iostreams/traits.hpp>
|
|
#include <boost/mpl/identity.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/type_traits/is_convertible.hpp>
|
|
#include <boost/type_traits/is_integral.hpp>
|
|
#include <boost/type_traits/remove_cv.hpp>
|
|
#include <boost/type_traits/remove_reference.hpp>
|
|
|
|
// Must come last.
|
|
#include <boost/iostreams/detail/config/disable_warnings.hpp>
|
|
|
|
namespace boost { namespace iostreams {
|
|
|
|
template<typename T>
|
|
void close(T& t);
|
|
|
|
template<typename T>
|
|
void close(T& t, BOOST_IOS::openmode which);
|
|
|
|
template<typename T, typename Sink>
|
|
void close(T& t, Sink& snk, BOOST_IOS::openmode which);
|
|
|
|
namespace detail {
|
|
|
|
template<typename T>
|
|
void close_all(T& t)
|
|
{
|
|
try {
|
|
boost::iostreams::close(t, BOOST_IOS::in);
|
|
} catch (...) {
|
|
try {
|
|
boost::iostreams::close(t, BOOST_IOS::out);
|
|
} catch (...) { }
|
|
throw;
|
|
}
|
|
boost::iostreams::close(t, BOOST_IOS::out);
|
|
}
|
|
|
|
template<typename T, typename Sink>
|
|
void close_all(T& t, Sink& snk)
|
|
{
|
|
try {
|
|
boost::iostreams::close(t, snk, BOOST_IOS::in);
|
|
} catch (...) {
|
|
try {
|
|
boost::iostreams::close(t, snk, BOOST_IOS::out);
|
|
} catch (...) { }
|
|
throw;
|
|
}
|
|
boost::iostreams::close(t, snk, BOOST_IOS::out);
|
|
}
|
|
|
|
} // End namespace detail.
|
|
|
|
} } // End namespaces iostreams, boost.
|
|
|
|
namespace boost { namespace iostreams {
|
|
|
|
namespace detail {
|
|
|
|
template<typename T>
|
|
struct close_impl;
|
|
|
|
} // End namespace detail.
|
|
|
|
template<typename T>
|
|
void close(T& t) { detail::close_all(t); }
|
|
|
|
template<typename T>
|
|
void close(T& t, BOOST_IOS::openmode which)
|
|
{
|
|
#ifdef BOOST_IOSTREAMS_STRICT
|
|
BOOST_ASSERT(which == BOOST_IOS::in || which == BOOST_IOS::out);
|
|
#else
|
|
if (which == (BOOST_IOS::in | BOOST_IOS::out)) {
|
|
detail::close_all(t);
|
|
return;
|
|
}
|
|
#endif
|
|
detail::close_impl<T>::close(detail::unwrap(t), which);
|
|
}
|
|
|
|
template<typename T, typename Sink>
|
|
void close(T& t, Sink& snk, BOOST_IOS::openmode which)
|
|
{
|
|
#ifdef BOOST_IOSTREAMS_STRICT
|
|
BOOST_ASSERT(which == BOOST_IOS::in || which == BOOST_IOS::out);
|
|
#else
|
|
if (which == (BOOST_IOS::in | BOOST_IOS::out)) {
|
|
detail::close_all(t, snk);
|
|
return;
|
|
}
|
|
#endif
|
|
detail::close_impl<T>::close(detail::unwrap(t), snk, which);
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
//------------------Definition of close_impl----------------------------------//
|
|
|
|
struct close_boost_stream { };
|
|
struct close_filtering_stream { };
|
|
|
|
template<typename T>
|
|
struct close_tag {
|
|
typedef typename category_of<T>::type category;
|
|
typedef typename detail::unwrapped_type<T>::type unwrapped;
|
|
typedef typename
|
|
iostreams::select<
|
|
mpl::not_< is_convertible<category, closable_tag> >,
|
|
any_tag,
|
|
mpl::or_<
|
|
is_boost_stream<unwrapped>,
|
|
is_boost_stream_buffer<unwrapped>
|
|
>,
|
|
close_boost_stream,
|
|
mpl::or_<
|
|
is_filtering_stream<unwrapped>,
|
|
is_filtering_streambuf<unwrapped>
|
|
>,
|
|
close_filtering_stream,
|
|
mpl::or_<
|
|
is_convertible<category, two_sequence>,
|
|
is_convertible<category, dual_use>
|
|
>,
|
|
two_sequence,
|
|
else_,
|
|
closable_tag
|
|
>::type type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct close_impl
|
|
: mpl::if_<
|
|
is_custom<T>,
|
|
operations<T>,
|
|
close_impl<BOOST_DEDUCED_TYPENAME close_tag<T>::type>
|
|
>::type
|
|
{ };
|
|
|
|
template<>
|
|
struct close_impl<any_tag> {
|
|
template<typename T>
|
|
static void close(T& t, BOOST_IOS::openmode which)
|
|
{
|
|
if (which == BOOST_IOS::out)
|
|
iostreams::flush(t);
|
|
}
|
|
|
|
template<typename T, typename Sink>
|
|
static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
|
|
{
|
|
if (which == BOOST_IOS::out) {
|
|
non_blocking_adapter<Sink> nb(snk);
|
|
iostreams::flush(t, nb);
|
|
}
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct close_impl<close_boost_stream> {
|
|
template<typename T>
|
|
static void close(T& t)
|
|
{
|
|
t.close();
|
|
}
|
|
template<typename T>
|
|
static void close(T& t, BOOST_IOS::openmode which)
|
|
{
|
|
if (which == BOOST_IOS::out)
|
|
t.close();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct close_impl<close_filtering_stream> {
|
|
template<typename T>
|
|
static void close(T& t, BOOST_IOS::openmode which)
|
|
{
|
|
typedef typename category_of<T>::type category;
|
|
const bool in = is_convertible<category, input>::value &&
|
|
!is_convertible<category, output>::value;
|
|
if (in == (which == BOOST_IOS::in) && t.is_complete())
|
|
t.pop();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct close_impl<closable_tag> {
|
|
template<typename T>
|
|
static void close(T& t, BOOST_IOS::openmode which)
|
|
{
|
|
typedef typename category_of<T>::type category;
|
|
const bool in = is_convertible<category, input>::value &&
|
|
!is_convertible<category, output>::value;
|
|
if (in == (which == BOOST_IOS::in))
|
|
t.close();
|
|
}
|
|
template<typename T, typename Sink>
|
|
static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
|
|
{
|
|
typedef typename category_of<T>::type category;
|
|
const bool in = is_convertible<category, input>::value &&
|
|
!is_convertible<category, output>::value;
|
|
if (in == (which == BOOST_IOS::in)) {
|
|
non_blocking_adapter<Sink> nb(snk);
|
|
t.close(nb);
|
|
}
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct close_impl<two_sequence> {
|
|
template<typename T>
|
|
static void close(T& t, BOOST_IOS::openmode which) { t.close(which); }
|
|
template<typename T, typename Sink>
|
|
static void close(T& t, Sink& snk, BOOST_IOS::openmode which)
|
|
{
|
|
non_blocking_adapter<Sink> nb(snk);
|
|
t.close(nb, which);
|
|
}
|
|
};
|
|
|
|
} // End namespace detail.
|
|
|
|
} } // End namespaces iostreams, boost.
|
|
|
|
#include <boost/iostreams/detail/config/enable_warnings.hpp>
|
|
|
|
#endif // #ifndef BOOST_IOSTREAMS_CLOSE_HPP_INCLUDED
|