1 files changed, 133 insertions, 0 deletions
diff --git a/engines/neverhood/gamevars.cpp b/engines/neverhood/gamevars.cpp
new file mode 100644
index 0000000000..87f5fe6dd9
--- /dev/null
+++ b/engines/neverhood/gamevars.cpp
@@ -0,0 +1,133 @@
+/* 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 "neverhood/gamevars.h"
+
+namespace Neverhood {
+
+GameVars::GameVars() {
+	addVar(0, 0);
+}
+
+void GameVars::clear() {
+	_vars.clear();
+	addVar(0, 0);
+}
+
+void GameVars::loadState(Common::InSaveFile *in) {
+	uint varCount;
+	_vars.clear();
+	varCount = in->readUint32LE();
+	for (uint i = 0; i < varCount; ++i) {
+		GameVar var;
+		var.nameHash = in->readUint32LE();
+		var.value = in->readUint32LE();
+		var.firstIndex = in->readUint16LE();
+		var.nextIndex = in->readUint16LE();
+		_vars.push_back(var);
+	}
+}
+
+void GameVars::saveState(Common::OutSaveFile *out) {
+	out->writeUint32LE(_vars.size());
+	for (uint i = 0; i < _vars.size(); ++i) {
+		GameVar &var = _vars[i];
+		out->writeUint32LE(var.nameHash);
+		out->writeUint32LE(var.value);
+		out->writeUint16LE(var.firstIndex);
+		out->writeUint16LE(var.nextIndex);
+	}
+}
+
+uint32 GameVars::getGlobalVar(uint32 nameHash) {
+	int16 varIndex = findSubVarIndex(0, nameHash);
+	return varIndex != -1 ? _vars[varIndex].value : 0;
+}
+
+void GameVars::setGlobalVar(uint32 nameHash, uint32 value) {
+	_vars[getSubVarIndex(0, nameHash)].value = value;
+}
+
+uint32 GameVars::getSubVar(uint32 nameHash, uint32 subNameHash) {
+	uint32 value = 0;
+	int16 varIndex = findSubVarIndex(0, nameHash);
+	if (varIndex != -1) {
+		int16 subVarIndex = findSubVarIndex(varIndex, subNameHash);
+		if (subVarIndex != -1)
+			value = _vars[subVarIndex].value;
+	} 
+	return value;
+}
+
+void GameVars::setSubVar(uint32 nameHash, uint32 subNameHash, uint32 value) {
+	int16 varIndex = getSubVarIndex(0, nameHash);
+	int16 subVarIndex = getSubVarIndex(varIndex, subNameHash);
+	_vars[subVarIndex].value = value;
+}
+
+int16 GameVars::addVar(uint32 nameHash, uint32 value) {
+	GameVar gameVar;
+	gameVar.nameHash = nameHash;
+	gameVar.value = value;
+	gameVar.firstIndex = -1;
+	gameVar.nextIndex = -1;
+	_vars.push_back(gameVar);
+	return _vars.size() - 1;
+}
+
+int16 GameVars::findSubVarIndex(int16 varIndex, uint32 subNameHash) {
+	for (int16 nextIndex = _vars[varIndex].firstIndex; nextIndex != -1; nextIndex = _vars[nextIndex].nextIndex)
+		if (_vars[nextIndex].nameHash == subNameHash)
+			return nextIndex;
+	return -1;
+}
+
+int16 GameVars::addSubVar(int16 varIndex, uint32 subNameHash, uint32 value) {
+	int16 nextIndex = _vars[varIndex].firstIndex;
+	int16 subVarIndex;
+	if (nextIndex == -1) {
+		subVarIndex = addVar(subNameHash, value);
+		_vars[varIndex].firstIndex = subVarIndex;
+	} else {
+		while (_vars[nextIndex].nextIndex != -1)
+			nextIndex = _vars[nextIndex].nextIndex;
+		subVarIndex = addVar(subNameHash, value);
+		_vars[nextIndex].nextIndex = subVarIndex;
+	}
+	return subVarIndex;
+}
+
+int16 GameVars::getSubVarIndex(int16 varIndex, uint32 subNameHash) {
+	int16 subVarIndex = findSubVarIndex(varIndex, subNameHash);
+	if (subVarIndex == -1)
+		subVarIndex = addSubVar(varIndex, subNameHash, 0);
+	return subVarIndex;
+}
+
+void GameVars::dumpVars() {
+	for (Common::Array<GameVar>::iterator it = _vars.begin(); it != _vars.end(); ++it) {
+		GameVar gameVar = *it;
+		debug("%08X %08X %3d %3d", gameVar.nameHash, gameVar.value, gameVar.firstIndex, gameVar.nextIndex);
+	}
+}
+
+} // End of namespace Neverhood