/* histogram/file.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 <stdio.h>

#include <gsl/gsl_errno.h>

#include <gsl/gsl_block.h>

#include <gsl/gsl_histogram.h>

int

gsl_histogram_fread (FILE * stream, gsl_histogram * h)

{

  int status = gsl_block_raw_fread (stream, h->range, h->n + 1, 1);

  if (status)

    return status;

  status = gsl_block_raw_fread (stream, h->bin, h->n, 1);

  return status;

}

int

gsl_histogram_fwrite (FILE * stream, const gsl_histogram * h)

{

  int status = gsl_block_raw_fwrite (stream, h->range, h->n + 1, 1);

  if (status)

    return status;

  status = gsl_block_raw_fwrite (stream, h->bin, h->n, 1);

  return status;

}

int

gsl_histogram_fprintf (FILE * stream, const gsl_histogram * h,

                       const char *range_format, const char *bin_format)

{

  size_t i;

  const size_t n = h->n;

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

    {

      int status = fprintf (stream, range_format, h->range[i]);

      if (status < 0)

        {

          GSL_ERROR ("fprintf failed", GSL_EFAILED);

        }

      status = putc (' ', stream);

      if (status == EOF)

        {

          GSL_ERROR ("putc failed", GSL_EFAILED);

        }

      status = fprintf (stream, range_format, h->range[i + 1]);

      if (status < 0)

        {

          GSL_ERROR ("fprintf failed", GSL_EFAILED);

        }

      status = putc (' ', stream);

      if (status == EOF)

        {

          GSL_ERROR ("putc failed", GSL_EFAILED);

        }

      status = fprintf (stream, bin_format, h->bin[i]);

      if (status < 0)

        {

          GSL_ERROR ("fprintf failed", GSL_EFAILED);

        }

      status = putc ('\n', stream);

      if (status == EOF)

        {

          GSL_ERROR ("putc failed", GSL_EFAILED);

        }

    }

  return GSL_SUCCESS;

}

int

gsl_histogram_fscanf (FILE * stream, gsl_histogram * h)

{

  size_t i;

  const size_t n = h->n;

  double upper;

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

    {

      int status = fscanf (stream,

                           "%lg %lg %lg", h->range + i, &upper,

                           h->bin + i);

      if (status != 3)

        {

          GSL_ERROR ("fscanf failed", GSL_EFAILED);

        }

    }

  h->range[n] = upper;

  return GSL_SUCCESS;

}