[seiscomp, scanloc] Install, add .gitignore

include/seiscomp/utils/units.h

@@ -0,0 +1,125 @@
+/***************************************************************************
+ * Copyright (C) gempa GmbH                                                *
+ * All rights reserved.                                                    *
+ * Contact: gempa GmbH (seiscomp-dev@gempa.de)                             *
+ *                                                                         *
+ * GNU Affero General Public License Usage                                 *
+ * This file may be used under the terms of the GNU Affero                 *
+ * Public License version 3.0 as published by the Free Software Foundation *
+ * and appearing in the file LICENSE included in the packaging of this     *
+ * file. Please review the following information to ensure the GNU Affero  *
+ * Public License version 3.0 requirements will be met:                    *
+ * https://www.gnu.org/licenses/agpl-3.0.html.                             *
+ *                                                                         *
+ * Other Usage                                                             *
+ * Alternatively, this file may be used in accordance with the terms and   *
+ * conditions contained in a signed written agreement between you and      *
+ * gempa GmbH.                                                             *
+ ***************************************************************************/
+
+
+#ifndef SEISCOMP_UTILS_UNITS_H
+#define SEISCOMP_UTILS_UNITS_H
+
+
+#include <seiscomp/core.h>
+#include <string>
+#include <map>
+
+
+namespace Seiscomp {
+namespace Util {
+
+
+struct SC_SYSTEM_CORE_API UnitConversion {
+	UnitConversion() {}
+	UnitConversion(const std::string &fromUnit_, const std::string &toUnit_,
+	               const std::string &toQMLUnit_, const std::string &toSEEDUnit_,
+	               double s)
+	: fromUnit(fromUnit_)
+	, toUnit(toUnit_)
+	, toQMLUnit(toQMLUnit_)
+	, toSEEDUnit(toSEEDUnit_)
+	, scale(s) {}
+
+	std::string fromUnit;
+	std::string toUnit;
+	std::string toQMLUnit;
+	std::string toSEEDUnit;
+	double      scale;
+
+	template <typename T>
+	T operator()(T value) const;
+
+	//! Convert from input unit to SI unit
+	template <typename T>
+	T convert(T value) const;
+
+	//! Convert from SI unit back to input unit
+	template <typename T>
+	T revert(T value) const;
+};
+
+
+/**
+ * @brief The UnitConverter class provides a simple interface to retrieve
+ *        information to convert a value from one unit to another.
+ *
+ * The class supports variants of displacement and motion units such as
+ * velocity and acceleration.
+ *
+ * @code
+ * double value = 123;
+ * double convertedValue;
+ * // Convert from m/s
+ * const UnitConversion *uc = UnitConverter::get('cm/s');
+ * if ( uc != nullptr )
+ *     convertedValue = uc->convert(value);
+ * @endcode
+ */
+class SC_SYSTEM_CORE_API UnitConverter {
+	// ----------------------------------------------------------------------
+	//  Public interface
+	// ----------------------------------------------------------------------
+	public:
+		/**
+		 * @brief Returns a conversion object for a particular input unit.
+		 * @param fromUnit The unit to convert from.
+		 * @return A pointer to the conversion object. If no conversion is
+		 *         available then nullptr is returned.
+		 */
+		static const UnitConversion *get(const std::string &fromUnit);
+
+
+	// ----------------------------------------------------------------------
+	//  Private members
+	// ----------------------------------------------------------------------
+	private:
+		typedef std::map<std::string, UnitConversion> ConversionMap;
+		static ConversionMap _conversionMap;
+};
+
+
+template <typename T>
+inline T UnitConversion::convert(T value) const {
+	return value*scale;
+}
+
+
+template <typename T>
+inline T UnitConversion::revert(T value) const {
+	return value/scale;
+}
+
+
+template <typename T>
+inline T UnitConversion::operator()(T value) const {
+	return convert(value);
+}
+
+
+}
+}
+
+
+#endif