73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
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/*
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Input and output stream classes for comedilib's C++ binding.
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The << and >> operators are NOT useful, as the overloaded bitshift
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operators are used for formatting. Instead use the unformatted read() and
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write() member functions.
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Copyright (C) 2007 Frank Mori Hess <fmhess@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _COMEDILIB_IOSTREAM_HPP
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#define _COMEDILIB_IOSTREAM_HPP
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#include <comedilib.hpp>
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#include <cstdio>
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#include <ext/stdio_filebuf.h>
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#include <iostream>
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#include <unistd.h>
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namespace comedi
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{
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namespace detail
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{
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class filebuf
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{
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public:
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filebuf(const comedi::device &dev, std::ios::openmode mode, size_t buffer_size)
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{
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int fd = dup(dev.fileno());
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if(fd < 0)
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{
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throw std::invalid_argument(__PRETTY_FUNCTION__);
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}
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m_filebuf.reset(new __gnu_cxx::stdio_filebuf<char>(fd, mode, buffer_size));
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}
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boost::scoped_ptr<__gnu_cxx::stdio_filebuf<char> > m_filebuf;
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};
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}
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class istream: private detail::filebuf, public std::istream
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{
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public:
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istream(const comedi::device &dev, size_t buffer_size = static_cast<size_t>(BUFSIZ)):
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detail::filebuf(dev, std::ios::in | std::ios::binary, buffer_size),
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std::istream(this->m_filebuf.get())
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{}
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};
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class ostream: private detail::filebuf, public std::ostream
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{
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public:
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ostream(const comedi::device &dev, size_t buffer_size = static_cast<size_t>(BUFSIZ)):
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detail::filebuf(dev, std::ios::out | std::ios::binary, buffer_size),
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std::ostream(this->m_filebuf.get())
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{}
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};
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};
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#endif // _COMEDILIB_IOSTREAM_HPP
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