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engines/glk/quest/quest.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+ /* Based on Geas interpreter version 3.53 */
+
+#ifndef GLK_QUEST_QUEST
+#define GLK_QUEST_QUEST
+
+#include "glk/glk_api.h"
+#include "glk/quest/string.h"
+#include "glk/quest/geas_runner.h"
+
+namespace Glk {
+namespace Quest {
+
+/**
+ * Quest game interpreter
+ */
+class Quest : public GlkAPI {
+private:
+	int _saveSlot;
+	GeasRunner *_runner;
+public:
+	String banner;
+private:
+	/**
+	 * Engine initialization
+	 */
+	bool initialize();
+
+	/**
+	 * Engine cleanup
+	 */
+	void deinitialize();
+
+	/**
+	 * Inner gameplay method
+	 */
+	void playGame();
+public:
+	/**
+	 * Constructor
+	 */
+	Quest(OSystem *syst, const GlkGameDescription &gameDesc);
+
+	/**
+	 * Run the game
+	 */
+	void runGame() override;
+
+	/**
+	 * Returns the running interpreter type
+	 */
+	InterpreterType getInterpreterType() const override {
+		return INTERPRETER_QUEST;
+	}
+
+	/**
+	 * Returns true if a savegame can be loaded
+	 */
+	bool canLoadGameStateCurrently(Common::U32String *msg = nullptr) override {
+		return _runner != nullptr && GlkAPI::canLoadGameStateCurrently();
+	}
+
+	/**
+	 * Returns true if the game can be saved
+	 */
+	bool canSaveGameStateCurrently(Common::U32String *msg = nullptr) override {
+		return _runner != nullptr && GlkAPI::canLoadGameStateCurrently();
+	}
+
+	/**
+	 * Savegames aren't supported for Quest games
+	 */
+	Common::Error readSaveData(Common::SeekableReadStream *rs) override;
+
+	/**
+	 * Savegames aren't supported for Quest games
+	 */
+	Common::Error writeGameData(Common::WriteStream *ws) override;
+
+	/**
+	 * Returns true if a savegame is being loaded directly from the ScummVM launcher
+	 */
+	bool loadingSavegame() const { return _saveSlot != -1; }
+};
+
+extern Quest *g_vm;
+
+} // End of namespace Quest
+} // End of namespace Glk
+
+#endif