usr.bin/calendar/calendar.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2020 The DragonFly Project.  All rights reserved.
   5  * Copyright (c) 1989, 1993, 1994
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to The DragonFly Project
   9  * by Aaron LI <aly@aaronly.me>
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $FreeBSD: head/usr.bin/calendar/calendar.h 326025 2017-11-20 19:49:47Z pfg $
  36  */
  37
  38 #ifndef CALENDAR_H_
  39 #define CALENDAR_H_
  40
  41 #include <stdbool.h>
  42 #include <stddef.h>
  43
  44 #ifndef __unused
  45 #define __unused        __attribute__((__unused__))
  46 #endif
  47 #ifndef __daed2
  48 #define __dead2         __attribute__((__noreturn__))
  49 #endif
  50
  51 /*
  52  * Maximum number of repeats of an event.  100 should be enough, which is
  53  * about the number of weeks in 2 years).  If you need more, then you may
  54  * be using this program wrong...
  55  */
  56 #define CAL_MAX_REPEAT  100
  57
  58 #define DPRINTF(...) \
  59         if (Options.debug) fprintf(stderr, __VA_ARGS__)
  60 #define DPRINTF2(...) \
  61         if (Options.debug >= 2) fprintf(stderr, __VA_ARGS__)
  62 #define DPRINTF3(...) \
  63         if (Options.debug >= 3) fprintf(stderr, __VA_ARGS__)
  64
  65
  66 struct location;
  67 struct cal_day;
  68
  69 struct cal_options {
  70         struct location *location;
  71         double time;  /* [0, 1) time of now in unit of days */
  72         int today;  /* R.D. of today to remind events */
  73         int day_begin;  /* beginning of date range to remind events */
  74         int day_end;  /* end of date range to remind events */
  75         int debug;  /* debug log level (higher means more verbose) */
  76         bool allmode;  /* whether to process calendars for all users */
  77 };
  78
  79 /* IDs of supported calendars */
  80 enum {
  81         CAL_GREGORIAN,
  82         CAL_JULIAN,
  83         CAL_CHINESE,
  84 };
  85
  86 struct calendar {
  87         int     id;  /* enum ID of the calendar */
  88         const char *name;
  89         int     (*format_date)(char *buf, size_t size, int rd);
  90         int     (*find_days_ymd)(int year, int month, int day,
  91                                  struct cal_day **dayp, char **edp);
  92         int     (*find_days_dom)(int dom, struct cal_day **dayp, char **edp);
  93         int     (*find_days_month)(int month, struct cal_day **dayp,
  94                                    char **edp);
  95         int     (*find_days_mdow)(int month, int dow, int index,
  96                                   struct cal_day **dayp, char **edp);
  97 };
  98
  99 extern struct cal_options Options;
 100 extern struct calendar *Calendar;
 101 extern const char *calendarDirs[];  /* paths to search for calendar files */
 102
 103 bool    set_calendar(const char *name);
 104
 105 #endif