usr.bin/calendar/day.c

   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
  42 static time_t           time1, time2;
  43 const struct tm         tm0;
  44 char                    dayname[100];
  45 int                     year1, year2;
  46
  47
  48 void
  49 settimes(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  */
  84 time_t
  85 Mktime(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 }