File: gridder_utils.h

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/*
 * This file is part of xrayutilities.
 *
 * xrayutilities 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; if not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright (C) 2013 Eugen Wintersberger <eugen.wintersberger@desy.de>
 * Copyright (C) 2013 Dominik Kriegner <dominik.kriegner@gmail.com>
 *
 ******************************************************************************
 *
 * created: Jun 8, 2013
 * author: Eugen Wintersberger
*/
#pragma once

#include <stdlib.h>
#include <stdio.h>

#include "xrayutilities.h"

/*!
\brief find minimum

Finds the minimum in an array.
\param a input data
\param n number of elements
\return minimum value
*/
double get_min(double *a, unsigned int n);

/*---------------------------------------------------------------------------*/
/*!
\brief find maximum

Finds the maximum value in an array.
\param a input data
\param n number of elements
\return return maximum value
*/
double get_max(double *a, unsigned int n);

/*---------------------------------------------------------------------------*/
/*!
\brief set array values

Set all elements of an array to the same values.
\param a input array
\param n number of points
\param value the new element values
*/
void set_array(double *a, unsigned int n, double value);

/*---------------------------------------------------------------------------*/
/*!
\brief compute step width

Computes the stepwidth of a grid.
\param min minimum value
\param max maximum value
\param n number of steps
\return step width
*/
double delta(double min, double max, unsigned int n);

/*---------------------------------------------------------------------------*/
/*!
\brief compute grid index

*/
unsigned int gindex(double x, double min, double d);