Initial commit

engines/saga2/gamemode.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
+ * aint32 with this program; if not, write to the Free Software
+ *
+ *
+ * Based on the original sources
+ *   Faery Tale II -- The Halls of the Dead
+ *   (c) 1993-1996 The Wyrmkeep Entertainment Co.
+ */
+
+#include "saga2/saga2.h"
+#include "saga2/floating.h"
+
+namespace Saga2 {
+
+/* ===================================================================== *
+   Functions to set what mode the game is in.
+ * ===================================================================== */
+
+//Initialize Static GameObject Data Members
+
+GameMode    *GameMode::_currentMode = nullptr;  // pointer to current mode.
+GameMode    *GameMode::_newMode = nullptr;      // next mode to run
+
+GameMode       *GameMode::_modeStackPtr[kMax_Modes] = { nullptr };
+GameMode       *GameMode::_newmodeStackPtr[kMax_Modes] = { nullptr };
+int         GameMode::_modeStackCtr = 0;
+int         GameMode::_newmodeStackCtr = 0;
+int         GameMode::_newmodeFlag = false;
+
+void GameMode::modeUnStack() {
+	_modeStackPtr[_modeStackCtr] = nullptr;                        //Always Start Cleanup At _modeStackCtr
+	_modeStackPtr[_modeStackCtr--]->_cleanup();
+	return;
+}
+
+void GameMode::modeUnStack(int StopHere) {
+	if (!_modeStackCtr)   //If Nothing Currently On The Stack
+		return;
+	for (int i = _modeStackCtr - 1; i >= StopHere; i--) { //Stop Here Is How Far You Want To Unstack
+		if (_modeStackPtr[i] != nullptr)
+			_modeStackPtr[i]->_cleanup();
+		_modeStackPtr[i] = nullptr;                        //Always Start Cleanup At _modeStackCtr
+		_modeStackCtr--;                        //Always Start Cleanup At _modeStackCtr
+	}
+	return;
+}
+
+bool GameMode::update() {
+	bool            result = false;
+	int             ModeCtr = 0;
+
+
+	_newmodeFlag = false;
+
+	for (int i = 0; i < _newmodeStackCtr; i++, ModeCtr++)
+		if (_newmodeStackPtr[i] != _modeStackPtr[i])
+			break;
+
+	//Now ModeCtr Equals How Deep In The Mode Is Equal
+
+	modeUnStack(ModeCtr);
+
+	for (int i = ModeCtr; i < _newmodeStackCtr; i++)
+		modeStack(_newmodeStackPtr[i]);
+
+	return result;
+
+}
+
+int GameMode::getStack(GameMode **saveStackPtr) {
+	memcpy(saveStackPtr, _modeStackPtr, sizeof(GameMode *) * _modeStackCtr);
+	return _modeStackCtr;
+}
+
+void GameMode::SetStack(GameMode *modeFirst, ...) {
+	va_list Modes;
+	va_start(Modes, modeFirst); //Initialize To First Argument Even Though We Dont Use It In The Loop
+	_newmodeStackCtr = 0; //reset Ctr For New Mode
+	GameMode *thisMode = modeFirst;
+
+	//Put List In New Array Of GameMode Object Pointers
+
+	while (thisMode != nullptr) {
+		_newmodeStackPtr[_newmodeStackCtr] = thisMode;
+		_newmodeStackCtr++;
+		thisMode  = va_arg(Modes, GameMode *);
+
+	}
+	va_end(Modes); //Clean Up
+
+	_newmodeFlag = true;
+}
+
+void GameMode::SetStack(GameMode **newStack, int newStackSize) {
+	_newmodeStackCtr = newStackSize;
+	memcpy(_newmodeStackPtr, newStack, sizeof(GameMode *) * newStackSize);
+	_newmodeFlag = true;
+}
+
+void GameMode::modeStack(GameMode *AddThisMode) {
+	_modeStackPtr[_modeStackCtr++] = AddThisMode;
+	AddThisMode->_setup();
+	return;
+}
+
+} // end of namespace Saga2