xref: /freebsd/usr.bin/calendar/calendar.h (revision 56e53cb8ef000c3ef72337a4095987a932cdedef)
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  * $FreeBSD$
32  */
33 
34 #include <sys/types.h>
35 #include <sys/uio.h>
36 
37 #define	SECSPERDAY	(24 * 60 * 60)
38 #define	SECSPERHOUR	(60 * 60)
39 #define	SECSPERMINUTE	(60)
40 #define	MINSPERHOUR	(60)
41 #define	HOURSPERDAY	(24)
42 #define	FSECSPERDAY	(24.0 * 60.0 * 60.0)
43 #define	FSECSPERHOUR	(60.0 * 60.0)
44 #define	FSECSPERMINUTE	(60.0)
45 #define	FMINSPERHOUR	(60.0)
46 #define	FHOURSPERDAY	(24.0)
47 
48 #define	DAYSPERYEAR	365
49 #define	DAYSPERLEAPYEAR	366
50 
51 /* Not yet categorized */
52 
53 extern struct passwd *pw;
54 extern int doall;
55 extern time_t t1, t2;
56 extern const char *calendarFile;
57 extern int yrdays;
58 extern struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon;
59 extern struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice;
60 extern double UTCOffset;
61 extern int EastLongitude;
62 
63 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
64 
65 /* Flags to determine the returned values by determinestyle() in parsedata.c */
66 #define	F_NONE			0x00000
67 #define	F_MONTH			0x00001
68 #define	F_DAYOFWEEK		0x00002
69 #define	F_DAYOFMONTH		0x00004
70 #define	F_MODIFIERINDEX		0x00008
71 #define	F_MODIFIEROFFSET	0x00010
72 #define	F_SPECIALDAY		0x00020
73 #define	F_ALLMONTH		0x00040
74 #define	F_ALLDAY		0x00080
75 #define	F_VARIABLE		0x00100
76 #define	F_EASTER		0x00200
77 #define	F_CNY			0x00400
78 #define	F_PASKHA		0x00800
79 #define	F_NEWMOON		0x01000
80 #define	F_FULLMOON		0x02000
81 #define	F_MAREQUINOX		0x04000
82 #define	F_SEPEQUINOX		0x08000
83 #define	F_JUNSOLSTICE		0x10000
84 #define	F_DECSOLSTICE		0x20000
85 #define	F_YEAR			0x40000
86 
87 #define	STRING_EASTER		"Easter"
88 #define	STRING_PASKHA		"Paskha"
89 #define	STRING_CNY		"ChineseNewYear"
90 #define STRING_NEWMOON		"NewMoon"
91 #define STRING_FULLMOON		"FullMoon"
92 #define STRING_MAREQUINOX	"MarEquinox"
93 #define STRING_SEPEQUINOX	"SepEquinox"
94 #define STRING_JUNSOLSTICE	"JunSolstice"
95 #define STRING_DECSOLSTICE	"DecSolstice"
96 
97 #define	MAXCOUNT		125	/* Random number of maximum number of
98 					 * repeats of an event. Should be 52
99 					 * (number of weeks per year), if you
100 					 * want to show two years then it
101 					 * should be 104. If you are seeing
102 					 * more than this you are using this
103 					 * program wrong.
104 					 */
105 
106 /*
107  * All the astronomical calculations are carried out for the meridian 120
108  * degrees east of Greenwich.
109  */
110 #define UTCOFFSET_CNY		8.0
111 
112 extern int	debug;		/* show parsing of the input */
113 extern int	year1, year2;
114 
115 /* events.c */
116 /*
117  * Event sorting related functions:
118  * - Use event_add() to create a new event
119  * - Use event_continue() to add more text to the last added event
120  * - Use event_print_all() to display them in time chronological order
121  */
122 struct event *event_add(int, int, int, char *, int, char *, char *);
123 void	event_continue(struct event *events, char *txt);
124 void	event_print_all(FILE *fp);
125 struct event {
126 	int	year;
127 	int	month;
128 	int	day;
129 	int	var;
130 	char	*date;
131 	char	*text;
132 	char	*extra;
133 	struct event *next;
134 };
135 
136 /* locale.c */
137 
138 struct fixs {
139 	char	*name;
140 	size_t	len;
141 };
142 
143 extern const char *days[];
144 extern const char *fdays[];
145 extern const char *fmonths[];
146 extern const char *months[];
147 extern const char *sequences[];
148 extern struct fixs fndays[8];		/* full national days names */
149 extern struct fixs fnmonths[13];	/* full national months names */
150 extern struct fixs ndays[8];		/* short national days names */
151 extern struct fixs nmonths[13];		/* short national month names */
152 extern struct fixs nsequences[10];
153 
154 void	setnnames(void);
155 void	setnsequences(char *);
156 
157 /* day.c */
158 extern const struct tm tm0;
159 extern char dayname[];
160 void	settimes(time_t,int before, int after, int friday, struct tm *tp1, struct tm *tp2);
161 time_t	Mktime(char *);
162 
163 /* parsedata.c */
164 int	parsedaymonth(char *, int *, int *, int *, int *, char **);
165 void	dodebug(char *type);
166 
167 /* io.c */
168 void	cal(void);
169 void	closecal(FILE *);
170 FILE	*opencalin(void);
171 FILE	*opencalout(void);
172 
173 /* ostern.c / paskha.c */
174 int	paskha(int);
175 int	easter(int);
176 int	j2g(int);
177 
178 /* dates.c */
179 extern int cumdaytab[][14];
180 extern int monthdaytab[][14];
181 extern int debug_remember;
182 void	generatedates(struct tm *tp1, struct tm *tp2);
183 void	dumpdates(void);
184 int	remember_ymd(int y, int m, int d);
185 int	remember_yd(int y, int d, int *rm, int *rd);
186 int	first_dayofweek_of_year(int y);
187 int	first_dayofweek_of_month(int y, int m);
188 int	walkthrough_dates(struct event **e);
189 void	addtodate(struct event *e, int year, int month, int day);
190 
191 /* pom.c */
192 #define	MAXMOONS	18
193 void	pom(int year, double UTCoffset, int *fms, int *nms);
194 void	fpom(int year, double utcoffset, double *ffms, double *fnms);
195 
196 /* sunpos.c */
197 void	equinoxsolstice(int year, double UTCoffset, int *equinoxdays, int *solsticedays);
198 void	fequinoxsolstice(int year, double UTCoffset, double *equinoxdays, double *solsticedays);
199 int	calculatesunlongitude30(int year, int degreeGMToffset, int *ichinesemonths);
200