/* histogram/add2d.c

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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.

 */

#include <config.h>

#include <stdlib.h>

#include <gsl/gsl_errno.h>

#include <gsl/gsl_histogram.h>

#include <gsl/gsl_histogram2d.h>

#include "find2d.c"

int

gsl_histogram2d_increment (gsl_histogram2d * h, double x, double y)

{

  int status = gsl_histogram2d_accumulate (h, x, y, 1.0);

  return status;

}

int

gsl_histogram2d_accumulate (gsl_histogram2d * h,

                            double x, double y, double weight)

{

  const size_t nx = h->nx;

  const size_t ny = h->ny;

  size_t i = 0, j = 0;

  int status = find2d (h->nx, h->xrange, h->ny, h->yrange, x, y, &i, &j);

  if (status)

    {

      return GSL_EDOM;

    }

  if (i >= nx)

    {

      GSL_ERROR ("index lies outside valid range of 0 .. nx - 1",

                 GSL_ESANITY);

    }

  if (j >= ny)

    {

      GSL_ERROR ("index lies outside valid range of 0 .. ny - 1",

                 GSL_ESANITY);

    }

  h->bin[i * ny + j] += weight;

  return GSL_SUCCESS;

}