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1 #ifndef TZFILE_H | 1 #ifndef TZFILE_H |
2 | 2 |
3 #define TZFILE_H | 3 #define TZFILE_H |
4 | 4 |
5 /* | 5 /* |
6 ** This file is in the public domain, so clarified as of | 6 ** This file is in the public domain, so clarified as of |
7 ** 1996-06-05 by Arthur David Olson. | 7 ** 1996-06-05 by Arthur David Olson. |
8 */ | 8 */ |
9 | 9 |
10 /* | 10 /* |
11 ** This header is for use ONLY with the time conversion code. | 11 ** This header is for use ONLY with the time conversion code. |
12 ** There is no guarantee that it will remain unchanged, | 12 ** There is no guarantee that it will remain unchanged, |
13 ** or that it will remain at all. | 13 ** or that it will remain at all. |
14 ** Do NOT copy it to any system include directory. | 14 ** Do NOT copy it to any system include directory. |
15 ** Thank you! | 15 ** Thank you! |
16 */ | 16 */ |
17 | 17 |
18 /* | 18 /* |
19 ** ID | |
20 */ | |
21 | |
22 #ifndef lint | |
23 #ifndef NOID | |
24 static char tzfilehid[] = "@(#)tzfile.h 8.1"; | |
25 #endif /* !defined NOID */ | |
26 #endif /* !defined lint */ | |
27 | |
28 /* | |
29 ** Information about time zone files. | 19 ** Information about time zone files. |
30 */ | 20 */ |
31 | 21 |
32 #ifndef TZDIR | 22 #ifndef TZDIR |
33 #define TZDIR "/usr/local/etc/zoneinfo" /* Time zone object file directory */ | 23 #define TZDIR "/usr/local/etc/zoneinfo" /* Time zone object file directory */ |
34 #endif /* !defined TZDIR */ | 24 #endif /* !defined TZDIR */ |
35 | 25 |
36 #ifndef TZDEFAULT | 26 #ifndef TZDEFAULT |
37 #define TZDEFAULT "localtime" | 27 #define TZDEFAULT "localtime" |
38 #endif /* !defined TZDEFAULT */ | 28 #endif /* !defined TZDEFAULT */ |
39 | 29 |
40 #ifndef TZDEFRULES | 30 #ifndef TZDEFRULES |
41 #define TZDEFRULES "posixrules" | 31 #define TZDEFRULES "posixrules" |
42 #endif /* !defined TZDEFRULES */ | 32 #endif /* !defined TZDEFRULES */ |
43 | 33 |
44 /* | 34 /* |
45 ** Each file begins with. . . | 35 ** Each file begins with. . . |
46 */ | 36 */ |
47 | 37 |
48 #define TZ_MAGIC "TZif" | 38 #define TZ_MAGIC "TZif" |
49 | 39 |
50 struct tzhead { | 40 struct tzhead { |
51 char tzh_magic[4]; /* TZ_MAGIC */ | 41 char tzh_magic[4]; /* TZ_MAGIC */ |
52 » char» tzh_version[1];»» /* '\0' or '2' as of 2005 */ | 42 » char» tzh_version[1];»» /* '\0' or '2' or '3' as of 2013 */ |
53 char tzh_reserved[15]; /* reserved--must be zero */ | 43 char tzh_reserved[15]; /* reserved--must be zero */ |
54 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ | 44 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ |
55 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ | 45 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ |
56 char tzh_leapcnt[4]; /* coded number of leap seconds */ | 46 char tzh_leapcnt[4]; /* coded number of leap seconds */ |
57 char tzh_timecnt[4]; /* coded number of transition times */ | 47 char tzh_timecnt[4]; /* coded number of transition times */ |
58 char tzh_typecnt[4]; /* coded number of local time types */ | 48 char tzh_typecnt[4]; /* coded number of local time types */ |
59 char tzh_charcnt[4]; /* coded number of abbr. chars */ | 49 char tzh_charcnt[4]; /* coded number of abbr. chars */ |
60 }; | 50 }; |
61 | 51 |
62 /* | 52 /* |
63 ** . . .followed by. . . | 53 ** . . .followed by. . . |
64 ** | 54 ** |
65 ** tzh_timecnt (char [4])s coded transition times a la time(2) | 55 ** tzh_timecnt (char [4])s coded transition times a la time(2) |
66 ** tzh_timecnt (unsigned char)s types of local time starting at above | 56 ** tzh_timecnt (unsigned char)s types of local time starting at above |
67 ** tzh_typecnt repetitions of | 57 ** tzh_typecnt repetitions of |
68 **» » one (char [4])» » coded UTC offset in seconds | 58 **» » one (char [4])» » coded UT offset in seconds |
69 ** one (unsigned char) used to set tm_isdst | 59 ** one (unsigned char) used to set tm_isdst |
70 ** one (unsigned char) that's an abbreviation list index | 60 ** one (unsigned char) that's an abbreviation list index |
71 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations | 61 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations |
72 ** tzh_leapcnt repetitions of | 62 ** tzh_leapcnt repetitions of |
73 ** one (char [4]) coded leap second transition times | 63 ** one (char [4]) coded leap second transition times |
74 ** one (char [4]) total correction after above | 64 ** one (char [4]) total correction after above |
75 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition | 65 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition |
76 ** time is standard time, if FALSE, | 66 ** time is standard time, if FALSE, |
77 ** transition time is wall clock time | 67 ** transition time is wall clock time |
78 ** if absent, transition times are | 68 ** if absent, transition times are |
79 ** assumed to be wall clock time | 69 ** assumed to be wall clock time |
80 ** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition | 70 ** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition |
81 **» » » » » time is UTC, if FALSE, | 71 **» » » » » time is UT, if FALSE, |
82 ** transition time is local time | 72 ** transition time is local time |
83 ** if absent, transition times are | 73 ** if absent, transition times are |
84 ** assumed to be local time | 74 ** assumed to be local time |
85 */ | 75 */ |
86 | 76 |
87 /* | 77 /* |
88 ** If tzh_version is '2' or greater, the above is followed by a second instance | 78 ** If tzh_version is '2' or greater, the above is followed by a second instance |
89 ** of tzhead and a second instance of the data in which each coded transition | 79 ** of tzhead and a second instance of the data in which each coded transition |
90 ** time uses 8 rather than 4 chars, | 80 ** time uses 8 rather than 4 chars, |
91 ** then a POSIX-TZ-environment-variable-style string for use in handling | 81 ** then a POSIX-TZ-environment-variable-style string for use in handling |
92 ** instants after the last transition time stored in the file | 82 ** instants after the last transition time stored in the file |
93 ** (with nothing between the newlines if there is no POSIX representation for | 83 ** (with nothing between the newlines if there is no POSIX representation for |
94 ** such instants). | 84 ** such instants). |
| 85 ** |
| 86 ** If tz_version is '3' or greater, the above is extended as follows. |
| 87 ** First, the POSIX TZ string's hour offset may range from -167 |
| 88 ** through 167 as compared to the POSIX-required 0 through 24. |
| 89 ** Second, its DST start time may be January 1 at 00:00 and its stop |
| 90 ** time December 31 at 24:00 plus the difference between DST and |
| 91 ** standard time, indicating DST all year. |
95 */ | 92 */ |
96 | 93 |
97 /* | 94 /* |
98 ** In the current implementation, "tzset()" refuses to deal with files that | 95 ** In the current implementation, "tzset()" refuses to deal with files that |
99 ** exceed any of the limits below. | 96 ** exceed any of the limits below. |
100 */ | 97 */ |
101 | 98 |
102 #ifndef TZ_MAX_TIMES | 99 #ifndef TZ_MAX_TIMES |
103 #define TZ_MAX_TIMES» 1200 | 100 #define TZ_MAX_TIMES» 2000 |
104 #endif /* !defined TZ_MAX_TIMES */ | 101 #endif /* !defined TZ_MAX_TIMES */ |
105 | 102 |
106 #ifndef TZ_MAX_TYPES | 103 #ifndef TZ_MAX_TYPES |
107 #ifndef NOSOLAR | 104 /* This must be at least 17 for Europe/Samara and Europe/Vilnius. */ |
108 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ | 105 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ |
109 #endif /* !defined NOSOLAR */ | |
110 #ifdef NOSOLAR | |
111 /* | |
112 ** Must be at least 14 for Europe/Riga as of Jan 12 1995, | |
113 ** as noted by Earl Chew. | |
114 */ | |
115 #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ | |
116 #endif /* !defined NOSOLAR */ | |
117 #endif /* !defined TZ_MAX_TYPES */ | 106 #endif /* !defined TZ_MAX_TYPES */ |
118 | 107 |
119 #ifndef TZ_MAX_CHARS | 108 #ifndef TZ_MAX_CHARS |
120 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ | 109 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ |
121 /* (limited by what unsigned chars can hold) */ | 110 /* (limited by what unsigned chars can hold) */ |
122 #endif /* !defined TZ_MAX_CHARS */ | 111 #endif /* !defined TZ_MAX_CHARS */ |
123 | 112 |
124 #ifndef TZ_MAX_LEAPS | 113 #ifndef TZ_MAX_LEAPS |
125 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ | 114 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ |
126 #endif /* !defined TZ_MAX_LEAPS */ | 115 #endif /* !defined TZ_MAX_LEAPS */ |
127 | 116 |
128 #define SECSPERMIN 60 | 117 #define SECSPERMIN 60 |
129 #define MINSPERHOUR 60 | 118 #define MINSPERHOUR 60 |
130 #define HOURSPERDAY 24 | 119 #define HOURSPERDAY 24 |
131 #define DAYSPERWEEK 7 | 120 #define DAYSPERWEEK 7 |
132 #define DAYSPERNYEAR 365 | 121 #define DAYSPERNYEAR 365 |
133 #define DAYSPERLYEAR 366 | 122 #define DAYSPERLYEAR 366 |
134 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) | 123 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) |
135 #define SECSPERDAY» ((long) SECSPERHOUR * HOURSPERDAY) | 124 #define SECSPERDAY» ((int_fast32_t) SECSPERHOUR * HOURSPERDAY) |
136 #define MONSPERYEAR 12 | 125 #define MONSPERYEAR 12 |
137 | 126 |
138 #define TM_SUNDAY 0 | 127 #define TM_SUNDAY 0 |
139 #define TM_MONDAY 1 | 128 #define TM_MONDAY 1 |
140 #define TM_TUESDAY 2 | 129 #define TM_TUESDAY 2 |
141 #define TM_WEDNESDAY 3 | 130 #define TM_WEDNESDAY 3 |
142 #define TM_THURSDAY 4 | 131 #define TM_THURSDAY 4 |
143 #define TM_FRIDAY 5 | 132 #define TM_FRIDAY 5 |
144 #define TM_SATURDAY 6 | 133 #define TM_SATURDAY 6 |
145 | 134 |
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171 ** or | 160 ** or |
172 ** isleap(a + b) == isleap(a % 400 + b % 400) | 161 ** isleap(a + b) == isleap(a % 400 + b % 400) |
173 ** This is true even if % means modulo rather than Fortran remainder | 162 ** This is true even if % means modulo rather than Fortran remainder |
174 ** (which is allowed by C89 but not C99). | 163 ** (which is allowed by C89 but not C99). |
175 ** We use this to avoid addition overflow problems. | 164 ** We use this to avoid addition overflow problems. |
176 */ | 165 */ |
177 | 166 |
178 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) | 167 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) |
179 | 168 |
180 #endif /* !defined TZFILE_H */ | 169 #endif /* !defined TZFILE_H */ |
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