/* err/error.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.

 */

#include <config.h>

#include <stddef.h>

#include <stdlib.h>

#include <stdio.h>

#include <gsl/gsl_errno.h>

#include <gsl/gsl_message.h>

gsl_error_handler_t * gsl_error_handler = NULL;

static void no_error_handler (const char *reason, const char *file, int line, int gsl_errno);

void

gsl_error (const char * reason, const char * file, int line, int gsl_errno)

{

  if (gsl_error_handler) 

    {

      (*gsl_error_handler) (reason, file, line, gsl_errno);

      return ;

    }

  gsl_stream_printf ("ERROR", file, line, reason);

  fflush (stdout);

  fprintf (stderr, "Default GSL error handler invoked.\n");

  fflush (stderr);

  abort ();

}

gsl_error_handler_t *

gsl_set_error_handler (gsl_error_handler_t * new_handler)

{

  gsl_error_handler_t * previous_handler = gsl_error_handler;

  gsl_error_handler = new_handler;

  return previous_handler;

}

gsl_error_handler_t *

gsl_set_error_handler_off (void)

{

  gsl_error_handler_t * previous_handler = gsl_error_handler;

  gsl_error_handler = no_error_handler;

  return previous_handler;

}

static void

no_error_handler (const char *reason, const char *file, int line, int gsl_errno)

{

  /* do nothing */

  reason = 0;

  file = 0;

  line = 0;

  gsl_errno = 0;

  return;

}