1 files changed, 51 insertions, 0 deletions
diff --git a/kstars/kstars/ksutils.cpp b/kstars/kstars/ksutils.cpp
new file mode 100644
index 00000000..b8db47f6
--- /dev/null
+++ b/kstars/kstars/ksutils.cpp
@@ -0,0 +1,51 @@
+/***************************************************************************
+                          ksutils.cpp  -  K Desktop Planetarium
+                             -------------------
+    begin                : Mon Jan  7 10:48:09 EST 2002
+    copyright            : (C) 2002 by Mark Hollomon
+    email                : mhh@mindspring.com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <kstandarddirs.h>
+#include <qfile.h>
+#include "ksutils.h"
+
+bool KSUtils::openDataFile( QFile &file, const QString &s ) {
+	bool result;
+	QString FileName = locate( "appdata", s );
+
+	if ( !FileName.isNull() ) {
+		file.setName( FileName );
+		if ( !file.open( IO_ReadOnly ) ) {
+			result = false;
+		} else {
+			result = true;
+		}
+	} else {
+		result = false;
+	}
+
+	return result;
+}
+
+long double KSUtils::lagrangeInterpolation( const long double x[], const long double v[], int n, long double xval) {
+	long double value = 0;
+	for (int i=1; i<n; ++i) {
+		long double c = 1.0;
+		for (int j = 1; j<n;++j) 
+			if (i != j)
+				c *= (xval - x[j]) / (x[i] - x[j]);
+		value += c *v[i];
+	}
+	
+	return value;
+}