/* err/stream.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>

FILE * gsl_stream = NULL ;

gsl_stream_handler_t * gsl_stream_handler = NULL;

void

gsl_stream_printf (const char *label, const char *file, int line, 

                   const char *reason)

{

  if (gsl_stream == NULL)

    {

      gsl_stream = stderr;

    }

  if (gsl_stream_handler)

    {

      (*gsl_stream_handler) (label, file, line, reason);

      return;

    }

  fprintf (gsl_stream, "gsl: %s:%d: %s: %s\n", file, line, label, reason);

}

gsl_stream_handler_t *

gsl_set_stream_handler (gsl_stream_handler_t * new_handler)

{

  gsl_stream_handler_t * previous_handler = gsl_stream_handler;

  gsl_stream_handler = new_handler;

  return previous_handler;

}

FILE *

gsl_set_stream (FILE * new_stream)

{

  FILE * previous_stream;

  if (gsl_stream == NULL) {

    gsl_stream = stderr;

  }

  previous_stream = gsl_stream;

  gsl_stream = new_stream;

  return previous_stream;

}