1 files changed, 126 insertions, 0 deletions
diff --git a/backends/plugins/dynamic-plugin.h b/backends/plugins/dynamic-plugin.h
new file mode 100644
index 0000000000..59c3af9a61
--- /dev/null
+++ b/backends/plugins/dynamic-plugin.h
@@ -0,0 +1,126 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001-2006 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_PLUGINS_DYNAMICPLUGIN_H
+#define BACKENDS_PLUGINS_DYNAMICPLUGIN_H
+
+#include "common/stdafx.h"
+#include "base/plugins.h"
+
+
+/** Type of factory functions which make new Engine objects. */
+typedef PluginError (*EngineFactory)(OSystem *syst, Engine **engine);
+
+typedef const char *(*NameFunc)();
+typedef GameDescriptor (*GameIDQueryFunc)(const char *gameid);
+typedef GameList (*GameIDListFunc)();
+typedef DetectedGameList (*DetectFunc)(const FSList &fslist);
+
+
+class DynamicPlugin : public Plugin {
+protected:
+	typedef void (*VoidFunc)();
+	
+	Common::String _name;
+	Common::String _copyright;
+	GameIDQueryFunc _qf;
+	EngineFactory _ef;
+	DetectFunc _df;
+	GameList _games;
+
+	virtual VoidFunc findSymbol(const char *symbol) = 0;
+
+public:
+	DynamicPlugin() : _qf(0), _ef(0), _df(0), _games() {}
+
+	const char *getName() const					{ return _name.c_str(); }
+	const char *getCopyright() const			{ return _copyright.c_str(); }
+
+	PluginError createInstance(OSystem *syst, Engine **engine) const {
+		assert(_ef);
+		return (*_ef)(syst, engine);
+	}
+
+	GameList getSupportedGames() const { return _games; }
+
+	GameDescriptor findGame(const char *gameid) const {
+		assert(_qf);
+		return (*_qf)(gameid);
+	}
+
+	DetectedGameList detectGames(const FSList &fslist) const {
+		assert(_df);
+		return (*_df)(fslist);
+	}
+
+	virtual bool loadPlugin() {
+		// Query the plugin's name
+		NameFunc nameFunc = (NameFunc)findSymbol("PLUGIN_name");
+		if (!nameFunc) {
+			unloadPlugin();
+			return false;
+		}
+		_name = nameFunc();
+	
+		// Query the plugin's copyright
+		nameFunc = (NameFunc)findSymbol("PLUGIN_copyright");
+		if (!nameFunc) {
+			unloadPlugin();
+			return false;
+		}
+		_copyright = nameFunc();
+	
+		// Query the plugin for the game ids it supports
+		GameIDListFunc gameListFunc = (GameIDListFunc)findSymbol("PLUGIN_gameIDList");
+		if (!gameListFunc) {
+			unloadPlugin();
+			return false;
+		}
+		_games = gameListFunc();
+	
+		// Retrieve the gameid query function
+		_qf = (GameIDQueryFunc)findSymbol("PLUGIN_findGameID");
+		if (!_qf) {
+			unloadPlugin();
+			return false;
+		}
+	
+		// Retrieve the factory function
+		_ef = (EngineFactory)findSymbol("PLUGIN_createEngine");
+		if (!_ef) {
+			unloadPlugin();
+			return false;
+		}
+	
+		// Retrieve the detector function
+		_df = (DetectFunc)findSymbol("PLUGIN_detectGames");
+		if (!_df) {
+			unloadPlugin();
+			return false;
+		}
+	
+		return true;
+	}
+};
+
+#endif