// (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. | |
#ifndef BOOST_IOSTREAMS_DETAIL_NON_BLOCKING_ADAPTER_HPP_INCLUDED | |
#define BOOST_IOSTREAMS_DETAIL_NON_BLOCKING_ADAPTER_HPP_INCLUDED | |
#include <boost/iostreams/detail/ios.hpp> // streamsize, seekdir, openmode. | |
#include <boost/iostreams/read.hpp> | |
#include <boost/iostreams/seek.hpp> | |
#include <boost/iostreams/traits.hpp> | |
#include <boost/iostreams/write.hpp> | |
namespace boost { namespace iostreams { | |
template<typename Device> | |
class non_blocking_adapter { | |
public: | |
typedef typename char_type_of<Device>::type char_type; | |
struct category | |
: mode_of<Device>::type, device_tag | |
{ }; | |
explicit non_blocking_adapter(Device& dev) : device_(dev) { } | |
std::streamsize read(char_type* s, std::streamsize n) | |
{ | |
std::streamsize result = 0; | |
while (result < n) { | |
std::streamsize amt = iostreams::read(device_, s, n); | |
if (amt == -1) | |
break; | |
result += amt; | |
} | |
return result != 0 ? result : -1; | |
} | |
std::streamsize write(const char_type* s, std::streamsize n) | |
{ | |
std::streamsize result = 0; | |
while (result < n) { | |
std::streamsize amt = | |
iostreams::write(device_, s + result, n - result); | |
result += amt; | |
} | |
return result; | |
} | |
std::streampos seek( stream_offset off, BOOST_IOS::seekdir way, | |
BOOST_IOS::openmode which = | |
BOOST_IOS::in | BOOST_IOS::out ) | |
{ return iostreams::seek(device_, off, way, which); } | |
public: | |
non_blocking_adapter& operator=(const non_blocking_adapter&); | |
Device& device_; | |
}; | |
} } // End namespace iostreams. | |
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_NON_BLOCKING_ADAPTER_HPP_INCLUDED |