1/*-
2 * Copyright (c) 1989, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
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	char *oldl, *lbufp;
52	struct tm tp;
53
54	localtime_r(&now, &tp);
55
56	/* Friday displays Monday's events */
57	if (after == 0 && before == 0 && friday != -1)
58		after = tp.tm_wday == friday ? 3 : 1;
59
60	time1 = now - SECSPERDAY * before;
61	localtime_r(&time1, tp1);
62	year1 = 1900 + tp1->tm_year;
63	time2 = now + SECSPERDAY * after;
64	localtime_r(&time2, tp2);
65	year2 = 1900 + tp2->tm_year;
66
67	strftime(dayname, sizeof(dayname) - 1, "%A, %d %B %Y", tp1);
68
69	oldl = NULL;
70	lbufp = setlocale(LC_TIME, NULL);
71	if (lbufp != NULL && (oldl = strdup(lbufp)) == NULL)
72		errx(1, "cannot allocate memory");
73	(void)setlocale(LC_TIME, "C");
74	(void)setlocale(LC_TIME, (oldl != NULL ? oldl : ""));
75	if (oldl != NULL)
76		free(oldl);
77
78	setnnames();
79}
80
81/* convert Day[/Month][/Year] into unix time (since 1970)
82 * Day: two digits, Month: two digits, Year: digits
83 */
84time_t
85Mktime(char *dp)
86{
87	time_t t;
88	int d, m, y;
89	struct tm tm, tp;
90
91	(void)time(&t);
92	localtime_r(&t, &tp);
93
94	tm = tm0;
95	tm.tm_mday = tp.tm_mday;
96	tm.tm_mon = tp.tm_mon;
97	tm.tm_year = tp.tm_year;
98
99	switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) {
100	case 3:
101		if (y > 1900)
102			y -= 1900;
103		tm.tm_year = y;
104		/* FALLTHROUGH */
105	case 2:
106		tm.tm_mon = m - 1;
107		/* FALLTHROUGH */
108	case 1:
109		tm.tm_mday = d;
110	}
111
112#ifdef DEBUG
113	fprintf(stderr, "Mktime: %d %d %s\n",
114	    (int)mktime(&tm), (int)t, asctime(&tm));
115#endif
116	return (mktime(&tm));
117}
118