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/* $Id$ */
/* Copyright (C) 2002 The gtkmm Development Team
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/streamiochannel.h>
#include <glibmm/main.h> //For Source
#include <glib.h>
#include <fstream>
#include <iostream>
namespace Glib
{
#ifndef GLIBMM_DISABLE_DEPRECATED
// static
Glib::RefPtr<StreamIOChannel> StreamIOChannel::create(std::istream& stream)
{
return Glib::RefPtr<StreamIOChannel>(new StreamIOChannel(&stream, 0));
}
// static
Glib::RefPtr<StreamIOChannel> StreamIOChannel::create(std::ostream& stream)
{
return Glib::RefPtr<StreamIOChannel>(new StreamIOChannel(0, &stream));
}
// static
Glib::RefPtr<StreamIOChannel> StreamIOChannel::create(std::iostream& stream)
{
return Glib::RefPtr<StreamIOChannel>(new StreamIOChannel(&stream, &stream));
}
StreamIOChannel::StreamIOChannel(std::istream* stream_in, std::ostream* stream_out)
:
stream_in_ (stream_in),
stream_out_ (stream_out)
{
get_flags_vfunc(); // initialize GIOChannel flag bits
}
StreamIOChannel::~StreamIOChannel()
{}
IOStatus StreamIOChannel::read_vfunc(char* buf, gsize count, gsize& bytes_read)
{
g_return_val_if_fail(stream_in_ != nullptr, IO_STATUS_ERROR);
stream_in_->clear();
stream_in_->read(buf, count);
bytes_read = stream_in_->gcount();
if(stream_in_->eof())
return IO_STATUS_EOF;
if(stream_in_->fail())
{
throw Glib::Error(G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, "Reading from stream failed");
}
return IO_STATUS_NORMAL;
}
IOStatus StreamIOChannel::write_vfunc(const char* buf, gsize count, gsize& bytes_written)
{
g_return_val_if_fail(stream_out_ != nullptr, IO_STATUS_ERROR);
bytes_written = 0;
stream_out_->clear();
stream_out_->write(buf, count);
if(stream_out_->fail())
{
throw Glib::Error(G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, "Writing to stream failed");
}
bytes_written = count; // all or nothing ;)
return IO_STATUS_NORMAL;
}
IOStatus StreamIOChannel::seek_vfunc(gint64 offset, SeekType type)
{
std::ios::seekdir direction = std::ios::beg;
switch(type)
{
case SEEK_TYPE_SET: direction = std::ios::beg; break;
case SEEK_TYPE_CUR: direction = std::ios::cur; break;
case SEEK_TYPE_END: direction = std::ios::end; break;
}
bool failed = false;
if(stream_in_)
{
stream_in_->clear();
stream_in_->seekg(offset, direction);
failed = stream_in_->fail();
}
if(stream_out_)
{
stream_out_->clear();
stream_out_->seekp(offset, direction);
failed = (failed || stream_out_->fail());
}
if(failed)
{
throw Glib::Error(G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, "Seeking into stream failed");
}
return Glib::IO_STATUS_NORMAL;
}
IOStatus StreamIOChannel::close_vfunc()
{
bool failed = false;
if(std::fstream *const fstream = dynamic_cast<std::fstream*>(stream_in_))
{
fstream->clear();
fstream->close();
failed = fstream->fail();
}
else if(std::ifstream *const ifstream = dynamic_cast<std::ifstream*>(stream_in_))
{
ifstream->clear();
ifstream->close();
failed = ifstream->fail();
}
else if(std::ofstream *const ofstream = dynamic_cast<std::ofstream*>(stream_out_))
{
ofstream->clear();
ofstream->close();
failed = ofstream->fail();
}
else
{
throw Glib::Error(G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED,
"Attempt to close non-file stream");
}
if(failed)
{
throw Glib::Error(G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, "Failed to close stream");
}
return IO_STATUS_NORMAL;
}
IOStatus StreamIOChannel::set_flags_vfunc(IOFlags)
{
return IO_STATUS_NORMAL;
}
IOFlags StreamIOChannel::get_flags_vfunc()
{
gobj()->is_seekable = 1;
gobj()->is_readable = (stream_in_ != nullptr);
gobj()->is_writeable = (stream_out_ != nullptr);
IOFlags flags = IO_FLAG_IS_SEEKABLE;
if(stream_in_)
flags |= IO_FLAG_IS_READABLE;
if(stream_out_)
flags |= IO_FLAG_IS_WRITEABLE;
return flags;
}
Glib::RefPtr<Glib::Source> StreamIOChannel::create_watch_vfunc(IOCondition)
{
g_warning("Glib::StreamIOChannel::create_watch_vfunc() not implemented");
return Glib::RefPtr<Glib::Source>();
}
#endif //GLIBMM_DISABLE_DEPRECATED
} // namespace Glib
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