numerics.h

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/* 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 2.1 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; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef _GAN_NUMERICS_H
#define _GAN_NUMERICS_H

#include <stdlib.h>
#include <gandalf/common/misc_defs.h>
#include <gandalf/common/complex.h>

#ifdef __cplusplus
extern "C" {
#endif

/* declarations of functions */
 int      gan_sqr_i  ( int       x );
 unsigned gan_sqr_ui ( unsigned  x );
 long     gan_sqr_l  ( long      x );
 float    gan_sqr_f  ( float     x );
 double   gan_sqr_d  ( double    x );
 double gan_cbrt ( double x );
 double gan_normal_sample ( double mu, double sigma );
 int gan_solve_quadratic ( double a, double b, double c,
                          Gan_Complex x[2] );
 int gan_solve_cubic ( double a, double b, double c, double d,
                      Gan_Complex x[3] );

 double gan_sqr ( double x );

 long gan_random(void);

 void gan_random_set_seed ( unsigned seed );

 double gan_random_01(void);

 double gan_random_m11(void);

void *gan_kth_highest ( void *base, size_t nmemb, size_t size,
                        unsigned int k,
                        int (*compar)(const void *, const void *) );

#ifdef __cplusplus
}
#endif

#endif /* #ifndef _GAN_NUMERICS_H */

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