Initial commit

engines/bladerunner/time.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/>.
+ *
+ */
+
+#include "bladerunner/time.h"
+
+#include "bladerunner/bladerunner.h"
+
+#include "common/timer.h"
+#include "common/system.h"
+
+namespace BladeRunner {
+
+Time::Time(BladeRunnerEngine *vm) {
+	_vm = vm;
+
+	_start = currentSystem();
+	_pauseCount = 0;
+	_offset = 0u;
+	_pauseStart = 0u;
+}
+
+uint32 Time::currentSystem() {
+	return _vm->getTotalPlayTime();
+}
+
+uint32 Time::current() {
+	uint32 time = currentSystem() - _offset;
+	return time - _start;
+}
+
+int Time::pause() {
+	if (_pauseCount == 0) {
+		_pauseStart = current();
+	}
+	return ++_pauseCount;
+}
+
+uint32 Time::getPauseStart() {
+	return _pauseStart;
+}
+
+int Time::resume() {
+	assert(_pauseCount > 0);
+	if (--_pauseCount == 0) {
+		_offset += current() - _pauseStart;
+	}
+	return _pauseCount;
+}
+
+bool Time::isLocked() {
+	return _pauseCount > 0;
+}
+
+// To be called before loading a new game, since
+// the offset should be reset to zero and _pauseStart should be current() (ie currentSystem() - _start)
+// TODO Explore if it would make sense to only use the Engine methods for time accounting (pauseEngine, get/setTotalPlatTime)
+//      or do we need separated/independent time accounting and pausing?
+void Time::resetPauseStart() {
+	_offset = 0u;
+	_pauseStart = current();
+}
+
+} // End of namespace BladeRunner