base/timestamp: add class to store a point of time

2 files changed, 108 insertions, 0 deletions

diff --git a/src/base/timestamp.cpp b/src/base/timestamp.cpp
new file mode 100644
index 00000000..668abbf9
--- /dev/null
+++ b/src/base/timestamp.cpp
@@ -0,0 +1,44 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe 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; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "timestamp.hpp"
+#include "time.hpp"
+
+namespace usdx
+{
+	Timestamp::Timestamp(void)
+		: time(Time::get_time())
+	{
+	}
+
+	bool Timestamp::since(float duration) const
+	{
+		return Time::get_time() < (time + duration);
+	}
+
+	void Timestamp::update(void)
+	{
+		time = Time::get_time();
+	}
+};
diff --git a/src/base/timestamp.hpp b/src/base/timestamp.hpp
new file mode 100644
index 00000000..18153e9f
--- /dev/null
+++ b/src/base/timestamp.hpp
@@ -0,0 +1,64 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe 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; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef TIMESTAMP_HPP
+#define TIMESTAMP_HPP
+
+namespace usdx
+{
+	/**
+	 * Simple class to store a given point of time and get the duration until
+	 * now.
+	 */
+	class Timestamp
+	{
+	private:
+		/**
+		 * internal storage of the point of time represented by the timestamp instance
+		 */
+		float time;
+
+	public:
+		/**
+		 * Create a Timestamp instance and store the current time.
+		 */
+		Timestamp(void);
+
+		/**
+		 * Check how many time elapsed since the recorded point of time.
+		 *
+		 * @param duration how many time may be elapsed
+		 * @return true, if the elapsed time is less than the given duration,
+		 * otherwise false
+		 */
+		bool since(float duration) const;
+
+		/**
+		 * Update the stored point of time to the current time.
+		 */
+		void update(void);
+	};
+};
+
+#endif