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/*
* 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.
* File: boost/iostreams/detail/functional.hpp
* Date: Sun Dec 09 05:38:03 MST 2007
* Copyright: 2007-2008 CodeRage, LLC
* Author: Jonathan Turkanis
* Contact: turkanis at coderage dot com
* Defines several function objects and object generators for use with
* execute_all()
*/
#ifndef BOOST_IOSTREAMS_DETAIL_FUNCTIONAL_HPP_INCLUDED
#define BOOST_IOSTREAMS_DETAIL_FUNCTIONAL_HPP_INCLUDED
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/iostreams/close.hpp>
#include <boost/iostreams/detail/ios.hpp> // BOOST_IOS
namespace boost { namespace iostreams { namespace detail {
// Function objects and object generators for invoking
// boost::iostreams::close
template<typename T>
class device_close_operation {
public:
typedef void result_type;
device_close_operation(T& t, BOOST_IOS::openmode which)
: t_(t), which_(which)
{ }
void operator()() const { boost::iostreams::close(t_, which_); }
private:
device_close_operation& operator=(const device_close_operation&);
T& t_;
BOOST_IOS::openmode which_;
};
template<typename T, typename Sink>
class filter_close_operation {
public:
typedef void result_type;
filter_close_operation(T& t, Sink& snk, BOOST_IOS::openmode which)
: t_(t), snk_(snk), which_(which)
{ }
void operator()() const { boost::iostreams::close(t_, snk_, which_); }
private:
filter_close_operation& operator=(const filter_close_operation&);
T& t_;
Sink& snk_;
BOOST_IOS::openmode which_;
};
template<typename T>
device_close_operation<T>
call_close(T& t, BOOST_IOS::openmode which)
{ return device_close_operation<T>(t, which); }
template<typename T, typename Sink>
filter_close_operation<T, Sink>
call_close(T& t, Sink& snk, BOOST_IOS::openmode which)
{ return filter_close_operation<T, Sink>(t, snk, which); }
// Function objects and object generators for invoking
// boost::iostreams::detail::close_all
template<typename T>
class device_close_all_operation {
public:
typedef void result_type;
device_close_all_operation(T& t) : t_(t) { }
void operator()() const { detail::close_all(t_); }
private:
device_close_all_operation& operator=(const device_close_all_operation&);
T& t_;
};
template<typename T, typename Sink>
class filter_close_all_operation {
public:
typedef void result_type;
filter_close_all_operation(T& t, Sink& snk) : t_(t), snk_(snk) { }
void operator()() const { detail::close_all(t_, snk_); }
private:
filter_close_all_operation& operator=(const filter_close_all_operation&);
T& t_;
Sink& snk_;
};
template<typename T>
device_close_all_operation<T> call_close_all(T& t)
{ return device_close_all_operation<T>(t); }
template<typename T, typename Sink>
filter_close_all_operation<T, Sink>
call_close_all(T& t, Sink& snk)
{ return filter_close_all_operation<T, Sink>(t, snk); }
// Function object and object generator for invoking a
// member function void close(std::ios_base::openmode)
template<typename T>
class member_close_operation {
public:
typedef void result_type;
member_close_operation(T& t, BOOST_IOS::openmode which)
: t_(t), which_(which)
{ }
void operator()() const { t_.close(which_); }
private:
member_close_operation& operator=(const member_close_operation&);
T& t_;
BOOST_IOS::openmode which_;
};
template<typename T>
member_close_operation<T> call_member_close(T& t, BOOST_IOS::openmode which)
{ return member_close_operation<T>(t, which); }
// Function object and object generator for invoking a
// member function void reset()
template<typename T>
class reset_operation {
public:
reset_operation(T& t) : t_(t) { }
void operator()() const { t_.reset(); }
private:
reset_operation& operator=(const reset_operation&);
T& t_;
};
template<typename T>
reset_operation<T> call_reset(T& t) { return reset_operation<T>(t); }
// Function object and object generator for clearing a flag
template<typename T>
class clear_flags_operation {
public:
typedef void result_type;
clear_flags_operation(T& t) : t_(t) { }
void operator()() const { t_ = 0; }
private:
clear_flags_operation& operator=(const clear_flags_operation&);
T& t_;
};
template<typename T>
clear_flags_operation<T> clear_flags(T& t)
{ return clear_flags_operation<T>(t); }
// Function object and generator for flushing a buffer
// Function object for use with execute_all()
template<typename Buffer, typename Device>
class flush_buffer_operation {
public:
typedef void result_type;
flush_buffer_operation(Buffer& buf, Device& dev, bool flush)
: buf_(buf), dev_(dev), flush_(flush)
{ }
void operator()() const
{
if (flush_)
buf_.flush(dev_);
}
private:
flush_buffer_operation& operator=(const flush_buffer_operation&);
Buffer& buf_;
Device& dev_;
bool flush_;
};
template<typename Buffer, typename Device>
flush_buffer_operation<Buffer, Device>
flush_buffer(Buffer& buf, Device& dev, bool flush)
{ return flush_buffer_operation<Buffer, Device>(buf, dev, flush); }
} } } // End namespaces detail, iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_FUNCTIONAL_HPP_INCLUDED
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