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/* gsl_histogram_calloc_range.c
* Copyright (C) 2000 Simone Piccardi
*
* This library 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/***************************************************************
*
* File gsl_histogram_calloc_range.c:
* Routine to create a variable binning histogram providing
* an input range vector. Need GSL library and header.
* Do range check and allocate the histogram data.
*
* Author: S. Piccardi
* Jan. 2000
*
***************************************************************/
#include <config.h>
#include <stdlib.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_histogram.h>
gsl_histogram *
gsl_histogram_calloc_range (size_t n, double *range)
{
size_t i;
gsl_histogram *h;
/* check arguments */
if (n == 0)
{
GSL_ERROR_VAL ("histogram length n must be positive integer",
GSL_EDOM, 0);
}
/* check ranges */
for (i = 0; i < n; i++)
{
if (range[i] >= range[i + 1])
{
GSL_ERROR_VAL ("histogram bin extremes must be "
"in increasing order", GSL_EDOM, 0);
}
}
/* Allocate histogram */
h = (gsl_histogram *) malloc (sizeof (gsl_histogram));
if (h == 0)
{
GSL_ERROR_VAL ("failed to allocate space for histogram struct",
GSL_ENOMEM, 0);
}
h->range = (double *) malloc ((n + 1) * sizeof (double));
if (h->range == 0)
{
/* exception in constructor, avoid memory leak */
free (h);
GSL_ERROR_VAL ("failed to allocate space for histogram ranges",
GSL_ENOMEM, 0);
}
h->bin = (double *) malloc (n * sizeof (double));
if (h->bin == 0)
{
/* exception in constructor, avoid memory leak */
free (h->range);
free (h);
GSL_ERROR_VAL ("failed to allocate space for histogram bins",
GSL_ENOMEM, 0);
}
/* initialize ranges */
for (i = 0; i <= n; i++)
{
h->range[i] = range[i];
}
/* clear contents */
for (i = 0; i < n; i++)
{
h->bin[i] = 0;
}
h->n = n;
return h;
}
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