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/* Copyright (C) 2015 The glibmm 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, see <http://www.gnu.org/licenses/>.
*/
#include <glibmm.h>
#include <giomm.h> //There is no class derived from Glib::Object in glibmm
#include <iostream>
#include <cstring>
#include <utility> // std::move
int main(int, char**)
{
Glib::init();
bool success = true;
// A Glib::WeakRef cannot be created from a Glib::RefPtr<Glib::Bytes>,
// because Glib::Bytes is not derived from Glib::ObjectBase.
//const int bdata = 1234;
//Glib::RefPtr<Glib::Bytes> bytes = Glib::Bytes::create(&bdata, sizeof bdata);
//Glib::WeakRef<Glib::Bytes> weakbytes = bytes; // does not compile
// Gio::MemoryInputStream
Glib::RefPtr<Gio::MemoryInputStream> memstream1 = Gio::MemoryInputStream::create();
const char data[] = "Some arbitrary data";
memstream1->add_data(data, sizeof data, Gio::MemoryInputStream::SlotDestroyData());
// Downcast copy, followed by upcast.
Glib::WeakRef<Gio::MemoryInputStream> weakmemstream1 = memstream1;
Glib::WeakRef<Gio::InputStream> weakstream1 = weakmemstream1;
Glib::WeakRef<Gio::MemoryInputStream> weakmemstream2 =
Glib::WeakRef<Gio::MemoryInputStream>::cast_dynamic(weakstream1);
Glib::RefPtr<Gio::MemoryInputStream> memstream2 = weakmemstream2.get();
if (memstream2)
{
char buffer[200];
gsize bytes_read = 0;
try
{
memstream2->read_all(buffer, sizeof buffer, bytes_read);
std::cout << buffer << std::endl;
success &= std::strcmp(buffer, data) == 0;
}
catch (const Glib::Error& ex)
{
std::cout << "Error reading from memory stream: " << ex.what() << std::endl;
success = false;
}
}
else
{
std::cout << "!memstream2" << std::endl;
success = false;
}
// Move construction.
Glib::WeakRef<Gio::MemoryInputStream> weakmemstream3(std::move(weakmemstream1));
if (weakmemstream1.get() || !weakmemstream3.get())
{
success = false;
if (weakmemstream1.get())
std::cout << "weakmemstream1 || !weakmemstream3: weakmemstream1" << std::endl;
if (!weakmemstream3.get())
std::cout << "weakmemstream1 || !weakmemstream3: !weakmemstream3" << std::endl;
}
else
{
// Move assignment.
weakmemstream2 = std::move(weakmemstream3);
if (!weakmemstream2 || weakmemstream3)
{
success = false;
if (!weakmemstream2.get())
std::cout << "!weakmemstream2 || weakmemstream3: !weakmemstream2" << std::endl;
if (weakmemstream3.get())
std::cout << "!weakmemstream2 || weakmemstream3: weakmemstream3" << std::endl;
}
else
{
// Downcast move, followed by upcast.
weakstream1 = std::move(weakmemstream2);
weakmemstream1 = Glib::WeakRef<Gio::MemoryInputStream>::cast_dynamic(weakstream1);
if (weakmemstream2 || !weakmemstream1)
{
success = false;
if (weakmemstream2)
std::cout << "weakmemstream2 || !weakmemstream1: weakmemstream2" << std::endl;
if (!weakmemstream1)
std::cout << "weakmemstream2 || !weakmemstream1: !weakmemstream1" << std::endl;
}
}
}
// Gio::SimpleAction
Glib::RefPtr<Gio::SimpleAction> action1 = Gio::SimpleAction::create("Action1");
Glib::ustring name = action1->get_name();
std::cout << "The name is '" << name << "'." << std::endl;
success &= name == "Action1";
Glib::WeakRef<Gio::SimpleAction> weakaction1 = action1;
Glib::WeakRef<Gio::SimpleAction> weakaction2 = weakaction1;
// A second RefPtr
Glib::RefPtr<Gio::SimpleAction> action2 = weakaction1.get();
if (action2)
{
name = action2->get_name();
std::cout << "The name is '" << name << "'." << std::endl;
success &= name == "Action1";
}
else
{
std::cout << "!action2" << std::endl;
success = false;
}
weakaction1.reset();
if (weakaction1.get())
{
std::cout << "weakaction1" << std::endl;
success = false;
}
action2 = weakaction2.get();
if (action2)
{
name = action2->get_name();
std::cout << "The name is '" << name << "'." << std::endl;
success &= name == "Action1";
}
else
{
std::cout << "!action2" << std::endl;
success = false;
}
// Reset one of the RefPtrs. One remains.
action1.reset();
action2 = weakaction2.get();
if (action2)
{
name = action2->get_name();
std::cout << "The name is '" << name << "'." << std::endl;
success &= name == "Action1";
}
else
{
std::cout << "!action2" << std::endl;
success = false;
}
// Reset the other RefPtr as well.
action2.reset();
if (weakaction2.get())
{
std::cout << "weakaction2" << std::endl;
success = false;
}
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
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