Initial commit

engines/wintermute/base/scriptables/script_stack.cpp

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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 file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#include "engines/wintermute/base/scriptables/script_stack.h"
+#include "engines/wintermute/base/scriptables/script_value.h"
+#include "engines/wintermute/base/base_game.h"
+
+namespace Wintermute {
+
+IMPLEMENT_PERSISTENT(ScStack, false)
+
+//////////////////////////////////////////////////////////////////////////
+ScStack::ScStack(BaseGame *inGame) : BaseClass(inGame) {
+	_sP = -1;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+ScStack::~ScStack() {
+	//_game->LOG(0, "STAT: Stack size: %d, SP=%d", _values.getSize(), _sP);
+
+	for (int32 i = 0; i < _values.getSize(); i++) {
+		delete _values[i];
+	}
+	_values.removeAll();
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+ScValue *ScStack::pop() {
+	if (_sP < 0) {
+		_game->LOG(0, "Fatal: Stack underflow");
+		return nullptr;
+	}
+
+	return _values[_sP--];
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::push(ScValue *val) {
+	_sP++;
+
+	if (_sP < _values.getSize()) {
+		_values[_sP]->cleanup();
+		_values[_sP]->copy(val);
+	} else {
+		ScValue *copyVal = new ScValue(_game);
+		copyVal->copy(val);
+		_values.add(copyVal);
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+ScValue *ScStack::getPushValue() {
+	_sP++;
+
+	if (_sP >= _values.getSize()) {
+		ScValue *val = new ScValue(_game);
+		_values.add(val);
+	}
+	_values[_sP]->cleanup();
+	return _values[_sP];
+}
+
+
+
+//////////////////////////////////////////////////////////////////////////
+ScValue *ScStack::getTop() {
+	if (_sP < 0 || _sP >= _values.getSize()) {
+		return nullptr;
+	} else {
+		return _values[_sP];
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+ScValue *ScStack::getAt(int index) {
+	index = _sP - index;
+	if (index < 0 || index >= _values.getSize()) {
+		return nullptr;
+	} else {
+		return _values[index];
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::correctParams(uint32 expectedParams) {
+	uint32 numParams = (uint32)pop()->getInt();
+
+	if (expectedParams < numParams) { // too many params
+		while (expectedParams < numParams) {
+			//pop();
+			delete _values[_sP - expectedParams];
+			_values.removeAt(_sP - expectedParams);
+			numParams--;
+			_sP--;
+		}
+	} else if (expectedParams > numParams) { // need more params
+		while (expectedParams > numParams) {
+			//push(nullVal);
+			ScValue *nullVal = new ScValue(_game);
+			nullVal->setNULL();
+			_values.insertAt(_sP - numParams + 1, nullVal);
+			numParams++;
+			_sP++;
+
+			if (_values.getSize() > _sP + 1) {
+				delete _values[_values.getSize() - 1];
+				_values.removeAt(_values.getSize() - 1);
+			}
+		}
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushNULL() {
+	getPushValue()->setNULL();
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushInt(int val) {
+	getPushValue()->setInt(val);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushFloat(double val) {
+	getPushValue()->setFloat(val);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushBool(bool val) {
+	getPushValue()->setBool(val);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushString(const char *val) {
+	getPushValue()->setString(val);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void ScStack::pushNative(BaseScriptable *val, bool persistent) {
+	getPushValue()->setNative(val, persistent);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool ScStack::persist(BasePersistenceManager *persistMgr) {
+
+	persistMgr->transferPtr(TMEMBER_PTR(_game));
+
+	persistMgr->transferSint32(TMEMBER(_sP));
+	_values.persist(persistMgr);
+
+	return STATUS_OK;
+}
+
+} // End of namespace Wintermute