/* vector/minmax_source.c

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough

 * 

 * 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 3 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, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 */

BASE 

FUNCTION(gsl_vector,max) (const TYPE(gsl_vector) * v)

{

  /* finds the largest element of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  BASE max = v->data[0 * stride];

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x > max)

        max = x;

#ifdef FP

      if (isnan (x))

        return x;

#endif

    }

  return max;

}

BASE 

FUNCTION(gsl_vector,min) (const TYPE(gsl_vector) * v)

{

  /* finds the smallest element of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  BASE min = v->data[0 * stride];

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x < min)

        min = x;

#ifdef FP

      if (isnan (x))

        return x;

#endif

    }

  return min;

}

void

FUNCTION(gsl_vector,minmax) (const TYPE(gsl_vector) * v,

                             BASE * min_out, 

                             BASE * max_out)

{

  /* finds the smallest and largest elements of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  BASE max = v->data[0 * stride];

  BASE min = v->data[0 * stride];

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x < min)

        {

          min = x;

        }

      if (x > max)

        {

          max = x;

        }

#ifdef FP

      if (isnan (x))

        {

          min = x;

          max = x;

          break;

        }

#endif

    }

  *min_out = min;

  *max_out = max;

}

size_t 

FUNCTION(gsl_vector,max_index) (const TYPE(gsl_vector) * v)

{

  /* finds the largest element of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  BASE max = v->data[0 * stride];

  size_t imax = 0;

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x > max)

        {

          max = x;

          imax = i;

        }

#ifdef FP

      if (isnan (x))

        {

          return i;

        }

#endif

    }

  return imax;

}

size_t 

FUNCTION(gsl_vector,min_index) (const TYPE(gsl_vector) * v)

{

  /* finds the smallest element of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  BASE min = v->data[0 * stride];

  size_t imin = 0;

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x < min)

        {

          min = x;

          imin = i;

        }

#ifdef FP

      if (isnan (x))

        {

          return i;

        }

#endif

    }

  return imin;

}

void

FUNCTION(gsl_vector,minmax_index) (const TYPE(gsl_vector) * v,

                                   size_t * imin_out, 

                                   size_t * imax_out)

{

  /* finds the smallest and largest elements of a vector */

  const size_t N = v->size ;

  const size_t stride = v->stride ;

  size_t imin = 0, imax = 0;

  BASE max = v->data[0 * stride];

  BASE min = v->data[0 * stride];

  size_t i;

  for (i = 0; i < N; i++)

    {

      BASE x = v->data[i*stride];

      if (x < min)

        {

          min = x;

          imin = i;

        }

      if (x > max)

        {

          max = x;

          imax = i;

        }

#ifdef FP

      if (isnan (x))

        {

          imin = i;

          imax = i;

          break;

        }

#endif

    }

  *imin_out = imin;

  *imax_out = imax;

}