ILLUSIONS: More work on the script system

1 files changed, 86 insertions, 0 deletions

diff --git a/engines/illusions/scriptopcodes.cpp b/engines/illusions/scriptopcodes.cpp
new file mode 100644
index 0000000000..ac38548faa
--- /dev/null
+++ b/engines/illusions/scriptopcodes.cpp
@@ -0,0 +1,86 @@
+/* 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 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.
+ *
+ */
+
+#include "illusions/illusions.h"
+#include "illusions/scriptopcodes.h"
+#include "illusions/scriptman.h"
+#include "illusions/scriptresource.h"
+#include "illusions/scriptthread.h"
+
+namespace Illusions {
+
+// ScriptOpcodes
+
+ScriptOpcodes::ScriptOpcodes(IllusionsEngine *vm)
+	: _vm(vm) {
+	initOpcodes();
+}
+
+ScriptOpcodes::~ScriptOpcodes() {
+	freeOpcodes();
+}
+
+void ScriptOpcodes::execOpcode(ScriptThread *scriptThread, OpCall &opCall) {
+	if (!_opcodes[opCall._op])
+		error("ScriptOpcodes::execOpcode() Unimplemented opcode %d", opCall._op);
+	debug("execOpcode(%d)", opCall._op);
+	(*_opcodes[opCall._op])(scriptThread, opCall);
+}
+
+typedef Common::Functor2Mem<ScriptThread*, OpCall&, void, ScriptOpcodes> ScriptOpcodeI;
+#define OPCODE(op, func) _opcodes[op] = new ScriptOpcodeI(this, &ScriptOpcodes::func);
+
+void ScriptOpcodes::initOpcodes() {
+	// First clear everything
+	for (uint i = 0; i < 256; ++i)
+		_opcodes[i] = 0;
+	// Register opcodes
+	OPCODE(42, opIncBlockCounter);
+	OPCODE(126, opDebug126);
+}
+
+#undef OPCODE
+
+void ScriptOpcodes::freeOpcodes() {
+	for (uint i = 0; i < 256; ++i)
+		delete _opcodes[i];
+}
+
+// Opcodes
+
+// Convenience macros
+#define	ARG_SKIP(x) opCall.skip(x); 
+#define ARG_INT16(name) int16 name = opCall.readSint16(); debug("ARG_INT16(" #name " = %d)", name);
+#define ARG_UINT32(name) uint32 name = opCall.readUint32(); debug("ARG_UINT32(" #name " = %d)", name);
+
+void ScriptOpcodes::opIncBlockCounter(ScriptThread *scriptThread, OpCall &opCall) {
+	ARG_INT16(index)	
+	byte value = _vm->_scriptMan->_scriptResource->_blockCounters.get(index + 1);
+	if (value <= 63)
+		_vm->_scriptMan->_scriptResource->_blockCounters.set(index + 1, value);
+}
+
+void ScriptOpcodes::opDebug126(ScriptThread *scriptThread, OpCall &opCall) {
+	// NOTE Prints some debug text
+}
+
+} // End of namespace Illusions