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engines/illusions/scriptopcodes.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/>.
+ *
+ */
+
+#ifndef ILLUSIONS_SCRIPTOPCODES_H
+#define ILLUSIONS_SCRIPTOPCODES_H
+
+#include "common/func.h"
+
+namespace Illusions {
+
+class IllusionsEngine;
+class ScriptThread;
+
+struct OpCall {
+	byte _op;
+	byte _opSize;
+	uint32 _threadId;
+	uint32 _callerThreadId;
+	int16 _deltaOfs;
+	byte *_code;
+	int _result;
+	void skip(uint size);
+	byte readByte();
+	int16 readSint16();
+	uint32 readUint32();
+};
+
+typedef Common::Functor2<ScriptThread*, OpCall&, void> ScriptOpcode;
+
+class ScriptOpcodes {
+public:
+	ScriptOpcodes(IllusionsEngine *vm);
+	virtual ~ScriptOpcodes();
+	void execOpcode(ScriptThread *scriptThread, OpCall &opCall);
+protected:
+	IllusionsEngine *_vm;
+	ScriptOpcode *_opcodes[256];
+	Common::String _opcodeNames[256];
+	virtual void initOpcodes() {}
+	virtual void freeOpcodes() {}
+};
+
+// Convenience macros
+#define ARG_SKIP(x) opCall.skip(x);
+#define ARG_BYTE(name) byte name = opCall.readByte(); debug(5, "ARG_BYTE(" #name " = %d)", name);
+#define ARG_INT16(name) int16 name = opCall.readSint16(); debug(5, "ARG_INT16(" #name " = %d)", name);
+#define ARG_UINT32(name) uint32 name = opCall.readUint32(); debug(5, "ARG_UINT32(" #name " = %08X)", name);
+
+} // End of namespace Illusions
+
+#endif // ILLUSIONS_SCRIPTOPCODES_H