1/*	$NetBSD: ctrace.c,v 1.24 2024/06/09 13:02:24 rillig Exp $	*/
2
3/*-
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if 0
34static char sccsid[] = "@(#)ctrace.c	8.2 (Berkeley) 10/5/93";
35#else
36__RCSID("$NetBSD: ctrace.c,v 1.24 2024/06/09 13:02:24 rillig Exp $");
37#endif
38
39#ifdef DEBUG
40#include <stdarg.h>
41#include <stdio.h>
42#include <stdlib.h>
43
44#include <sys/time.h>
45#include <string.h>
46
47#include "curses.h"
48#include "curses_private.h"
49
50static FILE *tracefp = NULL;		/* Curses debugging file descriptor. */
51
52static int tracemask;	/* Areas of trace output we want. */
53
54static int init_done = 0;
55
56static void
57__CTRACE_init(void)
58{
59	char *tf, *tm;
60
61	tm = getenv("CURSES_TRACE_MASK");
62	if (tm == NULL)
63		tracemask = __CTRACE_ALL;
64	else
65		tracemask = (int)strtol(tm, NULL, 0);
66	if (tracemask < 0)
67		tracemask = (0 - tracemask) ^ __CTRACE_ALL;
68	if (tracemask == 0)
69		return;
70
71	tf = getenv("CURSES_TRACE_FILE");
72
73	if ((tf != NULL) && !strcmp( tf, "<none>"))
74		tf = NULL;
75
76	if (tf != NULL)
77		tracefp = fopen(tf, "w");
78
79	init_done = 1;
80	__CTRACE(__CTRACE_ALL, "Trace mask: 0x%08x\n", tracemask);
81}
82
83void
84__CTRACE(int area, const char *fmt,...)
85{
86        static int seencr = 1;
87	va_list ap;
88
89	if (!init_done)
90		__CTRACE_init();
91	if (tracefp == NULL || !(tracemask & area))
92		return;
93
94        if (seencr && (tracemask & __CTRACE_TSTAMP)) {
95		struct timeval tv;
96                gettimeofday(&tv, NULL);
97                (void)fprintf(tracefp, "%llu.%06lu: ",
98		    (long long)tv.tv_sec, (long)tv.tv_usec);
99        }
100	va_start(ap, fmt);
101        (void)vfprintf(tracefp, fmt, ap);
102        seencr = (strchr(fmt, '\n') != NULL);
103	va_end(ap);
104	(void)fflush(tracefp);
105}
106#else
107/* Prevent an 'empty translation unit' message from lint. */
108typedef int dummy;
109#endif
110