1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993, 1994
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#include <err.h>
34#include <locale.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <time.h>
39
40#include "calendar.h"
41
42static time_t		time1, time2;
43const struct tm		tm0;
44char			dayname[100];
45int			year1, year2;
46
47
48void
49settimes(time_t now, int before, int after, int friday, struct tm *tp1, struct tm *tp2)
50{
51	struct tm tp;
52
53	localtime_r(&now, &tp);
54
55	/* Friday displays Monday's events */
56	if (after == 0 && before == 0 && friday != -1)
57		after = tp.tm_wday == friday ? 3 : 1;
58
59	time1 = now - SECSPERDAY * before;
60	localtime_r(&time1, tp1);
61	year1 = 1900 + tp1->tm_year;
62	time2 = now + SECSPERDAY * after;
63	localtime_r(&time2, tp2);
64	year2 = 1900 + tp2->tm_year;
65
66	strftime(dayname, sizeof(dayname) - 1, "%A, %d %B %Y", tp1);
67
68	setnnames();
69}
70
71/* convert Day[/Month][/Year] into unix time (since 1970)
72 * Day: two digits, Month: two digits, Year: digits
73 */
74time_t
75Mktime(char *dp)
76{
77	time_t t;
78	int d, m, y;
79	struct tm tm, tp;
80
81	(void)time(&t);
82	localtime_r(&t, &tp);
83
84	tm = tm0;
85	tm.tm_mday = tp.tm_mday;
86	tm.tm_mon = tp.tm_mon;
87	tm.tm_year = tp.tm_year;
88
89	switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) {
90	case 3:
91		if (y > 1900)
92			y -= 1900;
93		tm.tm_year = y;
94		/* FALLTHROUGH */
95	case 2:
96		tm.tm_mon = m - 1;
97		/* FALLTHROUGH */
98	case 1:
99		tm.tm_mday = d;
100	}
101
102#ifdef DEBUG
103	fprintf(stderr, "Mktime: %d %d %s\n",
104	    (int)mktime(&tm), (int)t, asctime(&tm));
105#endif
106	return (mktime(&tm));
107}
108