// (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) && (_MSC_VER >= 1020) | |
# 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 namespaces detail. | |
} } // End namespaces iostreams, boost. | |
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-----------------------------------// | |
# include <boost/iostreams/detail/vc6/close.hpp> | |
#else // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //--------------------------// | |
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. | |
#endif // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-------------------------// | |
#include <boost/iostreams/detail/config/enable_warnings.hpp> | |
#endif // #ifndef BOOST_IOSTREAMS_CLOSE_HPP_INCLUDED |