Added comedi::istream and ostream classes, to provide slightly higher

level ostream::write() and istream::read() functions for transferring
data during commands.

diff --git a/c++/include/comedi_iostream.hpp b/c++/include/comedi_iostream.hpp
new file mode 100644 (file)
index 0000000..6600b52
--- /dev/null
+++ b/c++/include/comedi_iostream.hpp
@@ -0,0 +1,72 @@
+/*
+       Input and output stream classes for comedilib's C++ binding.
+       The << and >> operators are NOT useful, as the overloaded bitshift
+       operators are used for formatting.  Instead use the unformatted read() and
+       write() member functions.
+
+       Copyright (C) 2007  Frank Mori Hess <fmhess@users.sourceforge.net>
+
+       This program is free software; you can redistribute it and/or modify
+       it under the terms of the GNU Lesser General Public License as published by
+       the Free Software Foundation; either version 2 of the License, or
+       (at your option) any later version.
+
+       This program is distributed in the hope that it will be useful,
+       but WITHOUT ANY WARRANTY; without even the implied warranty of
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+       GNU General Public License for more details.
+
+       You should have received a copy of the GNU Lesser General Public License
+       along with this program; if not, write to the Free Software
+       Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef _COMEDILIB_IOSTREAM_HPP
+#define _COMEDILIB_IOSTREAM_HPP
+
+#include <comedilib.hpp>
+#include <cstdio>
+#include <ext/stdio_filebuf.h>
+#include <iostream>
+#include <unistd.h>
+
+namespace comedi
+{
+       namespace detail
+       {
+               class filebuf
+               {
+               public:
+                       filebuf(const comedi::device &dev, std::ios::openmode mode, size_t buffer_size)
+                       {
+                               int fd = dup(dev.fileno());
+                               if(fd < 0)
+                               {
+                                       throw std::invalid_argument(__PRETTY_FUNCTION__);
+                               }
+                               m_filebuf.reset(new __gnu_cxx::stdio_filebuf<char>(fd, mode, buffer_size));
+                       }
+                       boost::scoped_ptr<__gnu_cxx::stdio_filebuf<char> > m_filebuf;
+               };
+       }
+
+       class istream: private detail::filebuf, public std::istream
+       {
+       public:
+               istream(const comedi::device &dev, size_t buffer_size = static_cast<size_t>(BUFSIZ)):
+                       detail::filebuf(dev, std::ios::in | std::ios::binary, buffer_size),
+                       std::istream(this->m_filebuf.get())
+               {}
+       };
+
+       class ostream: private detail::filebuf, public std::ostream
+       {
+       public:
+               ostream(const comedi::device &dev, size_t buffer_size = static_cast<size_t>(BUFSIZ)):
+                       detail::filebuf(dev, std::ios::out | std::ios::binary, buffer_size),
+                       std::ostream(this->m_filebuf.get())
+               {}
+       };
+};
+
+#endif // _COMEDILIB_IOSTREAM_HPP