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src/Math/Utils.h

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+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+
+
+#ifndef U_UTILS_H
+#define U_UTILS_H
+
+#include <math.h>
+#include <limits>
+#include <float.h>
+
+#define fastSign(x) ((x>0)-(x<0))
+
+namespace uLib {
+
+inline bool isFinite(float x) {
+    return (x<=FLT_MAX && x>= -FLT_MAX);
+}
+
+inline bool isFinite(double x) {
+    return (x<=DBL_MAX && x>= -DBL_MAX);
+}
+
+template <typename T> int sign(T val) {
+    return (T(0) < val) - (val < T(0));
+}
+
+}
+
+#endif // UTILS_H