1 /* err/stream.c
2 *
3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 */
19
20 #include "gsl__config.h"
21 #include <stddef.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24
25 #include "gsl_errno.h"
26 #include "gsl_message.h"
27
28 FILE * gsl_stream = NULL ;
29 gsl_stream_handler_t * gsl_stream_handler = NULL;
30
31 void
gsl_stream_printf(const char * label,const char * file,int line,const char * reason)32 gsl_stream_printf (const char *label, const char *file, int line,
33 const char *reason)
34 {
35 if (gsl_stream == NULL)
36 {
37 gsl_stream = stderr;
38 }
39 if (gsl_stream_handler)
40 {
41 (*gsl_stream_handler) (label, file, line, reason);
42 return;
43 }
44 fprintf (gsl_stream, "gsl: %s:%d: %s: %s\n", file, line, label, reason);
45
46 }
47
48 gsl_stream_handler_t *
gsl_set_stream_handler(gsl_stream_handler_t * new_handler)49 gsl_set_stream_handler (gsl_stream_handler_t * new_handler)
50 {
51 gsl_stream_handler_t * previous_handler = gsl_stream_handler;
52 gsl_stream_handler = new_handler;
53 return previous_handler;
54 }
55
56 FILE *
gsl_set_stream(FILE * new_stream)57 gsl_set_stream (FILE * new_stream)
58 {
59 FILE * previous_stream;
60 if (gsl_stream == NULL) {
61 gsl_stream = stderr;
62 }
63 previous_stream = gsl_stream;
64 gsl_stream = new_stream;
65 return previous_stream;
66 }
67