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/***************************************************************************
kstars.h - K Desktop Planetarium
-------------------
begin : Mon Jan 7 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. *
* *
***************************************************************************/
/**@class KSUtils
*@short KStars utility functions
*@author Mark Hollomon
*@version 1.0
*Static functions for various purposes.
*The openDataFile() function searches the standard KDE directories
*for the data filename given as an argument.
*(it is impossible to instantiate a KSUtils object; just use the static functions).
*/
#ifndef KSTARS_KSUTILS_H_
#define KSTARS_KSUTILS_H_
class QFile;
class KSUtils {
public:
/**Attempt to open the data file named filename, using the QFile object "file".
*First look in the standard KDE directories, then look in a local "data"
*subdirectory. If the data file cannot be found or opened, display a warning
*messagebox.
*@short Open a data file.
*@param &file The QFile object to be opened
*@param filename The name of the data file.
*@returns bool Returns true if data file was opened successfully.
*@returns a reference to the opened file.
*/
static bool openDataFile( QFile &file, const QString &filename );
/** Lagrange interpolation using a maximum number of 10 points.
*@param x[] double array with x values
*@param v[] double array with y values
*@param n number of points to use for interpolation
*@param xval value for which we are looking for the y value.
*/
static long double lagrangeInterpolation(const long double x[], const long double v[], int n, long double xval);
private:
/**Constructor. This class is just a collection of static functions, so
*we have made the constructor private (so it is not possible to
*instantiate a KSUtils object).
*/
KSUtils();
};
#endif
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