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engines/sword25/script/luascript.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/>.
+ *
+ */
+
+/*
+ * This code is based on Broken Sword 2.5 engine
+ *
+ * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
+ *
+ * Licensed under GNU GPL v2
+ *
+ */
+
+#ifndef SWORD25_LUASCRIPT_H
+#define SWORD25_LUASCRIPT_H
+
+#include "common/str.h"
+#include "common/str-array.h"
+#include "sword25/kernel/common.h"
+#include "sword25/script/script.h"
+
+struct lua_State;
+
+namespace Sword25 {
+
+class Kernel;
+
+class LuaScriptEngine : public ScriptEngine {
+public:
+	LuaScriptEngine(Kernel *KernelPtr);
+	~LuaScriptEngine() override;
+
+	/**
+	 * Initializes the scripting engine
+	 * @return              Returns true if successful, otherwise false.
+	*/
+	bool init() override;
+
+	/**
+	 * Loads a script file and executes it
+	 * @param FileName      The filename of the script
+	 * @return              Returns true if successful, otherwise false.
+	 */
+	bool executeFile(const Common::String &fileName) override;
+
+	/**
+	 * Execute a string of script code
+	 * @param Code          A string of script code
+	 * @return              Returns true if successful, otherwise false.
+	 */
+	bool executeString(const Common::String &code) override;
+
+	/**
+	 * Returns a pointer to the main object of the scripting language
+	 * @remark              Using this method breaks the encapsulation of the language
+	 */
+	void *getScriptObject() override {
+		return _state;
+	}
+
+	/**
+	 * Makes the command line parameters for the scripting environment available
+	 * @param CommandLineParameters An array containing all the command line parameters
+	 * @remark              How the command line parameters will be used by scripts is
+	 * dependant on the particular implementation.
+	 */
+	void setCommandLine(const Common::StringArray &commandLineParameters) override;
+
+	/**
+	 * @remark              The Lua stack is cleared by this method
+	 */
+	bool persist(OutputPersistenceBlock &writer) override;
+	/**
+	 * @remark              The Lua stack is cleared by this method
+	 */
+	bool unpersist(InputPersistenceBlock &reader) override;
+
+private:
+	lua_State *_state;
+	int _pcallErrorhandlerRegistryIndex;
+
+	bool registerStandardLibs();
+	bool registerStandardLibExtensions();
+	bool executeBuffer(const byte *data, uint size, const Common::String &name) const;
+};
+
+} // End of namespace Sword25
+
+#endif