1 #ifndef lint 2 #ifndef NOID 3 #ifndef TZFILE_H 4 #define TZFILE_H 5 static char tzfilehid[] = "@(#)tzfile.h 4.5"; 6 #endif /* !defined TZFILE_H */ 7 #endif /* !defined NOID */ 8 #endif /* !defined lint */ 9 10 /* 11 ** Information about time zone files. 12 */ 13 14 #ifndef TZDIR 15 #define TZDIR "/etc/zoneinfo" /* Time zone object file directory */ 16 #endif /* !defined TZDIR */ 17 18 #ifndef TZDEFAULT 19 #define TZDEFAULT "localtime" 20 #endif /* !defined TZDEFAULT */ 21 22 #ifndef TZDEFRULES 23 #define TZDEFRULES "posixrules" 24 #endif /* !defined TZDEFRULES */ 25 26 /* 27 ** Each file begins with. . . 28 */ 29 30 struct tzhead { 31 char tzh_reserved[24]; /* reserved for future use */ 32 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 33 char tzh_leapcnt[4]; /* coded number of leap seconds */ 34 char tzh_timecnt[4]; /* coded number of transition times */ 35 char tzh_typecnt[4]; /* coded number of local time types */ 36 char tzh_charcnt[4]; /* coded number of abbr. chars */ 37 }; 38 39 /* 40 ** . . .followed by. . . 41 ** 42 ** tzh_timecnt (char [4])s coded transition times a la time(2) 43 ** tzh_timecnt (unsigned char)s types of local time starting at above 44 ** tzh_typecnt repetitions of 45 ** one (char [4]) coded GMT offset in seconds 46 ** one (unsigned char) used to set tm_isdst 47 ** one (unsigned char) that's an abbreviation list index 48 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 49 ** tzh_leapcnt repetitions of 50 ** one (char [4]) coded leap second transition times 51 ** one (char [4]) total correction after above 52 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 53 ** time is standard time, if FALSE, 54 ** transition time is wall clock time 55 ** if absent, transition times are 56 ** assumed to be wall clock time 57 */ 58 59 /* 60 ** In the current implementation, "tzset()" refuses to deal with files that 61 ** exceed any of the limits below. 62 */ 63 64 #ifndef TZ_MAX_TIMES 65 /* 66 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a 67 ** year's worth of solar time (corrected daily to the nearest second) or 68 ** 138 years of Pacific Presidential Election time 69 ** (where there are three time zone transitions every fourth year). 70 */ 71 #define TZ_MAX_TIMES 370 72 #endif /* !defined TZ_MAX_TIMES */ 73 74 #ifndef TZ_MAX_TYPES 75 #ifndef NOSOLAR 76 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 77 #else /* !defined NOSOLAR */ 78 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */ 79 #endif /* !defined NOSOLAR */ 80 #endif /* !defined TZ_MAX_TYPES */ 81 82 #ifndef TZ_MAX_CHARS 83 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 84 #endif /* !defined TZ_MAX_CHARS */ 85 86 #ifndef TZ_MAX_LEAPS 87 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 88 #endif /* !defined TZ_MAX_LEAPS */ 89 90 #define SECSPERMIN 60 91 #define MINSPERHOUR 60 92 #define HOURSPERDAY 24 93 #define DAYSPERWEEK 7 94 #define DAYSPERNYEAR 365 95 #define DAYSPERLYEAR 366 96 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 97 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 98 #define MONSPERYEAR 12 99 100 #define TM_SUNDAY 0 101 #define TM_MONDAY 1 102 #define TM_TUESDAY 2 103 #define TM_WEDNESDAY 3 104 #define TM_THURSDAY 4 105 #define TM_FRIDAY 5 106 #define TM_SATURDAY 6 107 108 #define TM_JANUARY 0 109 #define TM_FEBRUARY 1 110 #define TM_MARCH 2 111 #define TM_APRIL 3 112 #define TM_MAY 4 113 #define TM_JUNE 5 114 #define TM_JULY 6 115 #define TM_AUGUST 7 116 #define TM_SEPTEMBER 8 117 #define TM_OCTOBER 9 118 #define TM_NOVEMBER 10 119 #define TM_DECEMBER 11 120 121 #define TM_YEAR_BASE 1900 122 123 #define EPOCH_YEAR 1970 124 #define EPOCH_WDAY TM_THURSDAY 125 126 /* 127 ** Accurate only for the past couple of centuries; 128 ** that will probably do. 129 */ 130 131 #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0) 132