home *** CD-ROM | disk | FTP | other *** search
- #ifndef TZFILE_H
-
- #define TZFILE_H
-
- /*
- ** This header is for use ONLY with the time conversion code.
- ** There is no guarantee that it will remain unchanged,
- ** or that it will remain at all.
- ** Do NOT copy it to any system include directory.
- ** Thank you!
- */
-
- /*
- ** Information about time zone files.
- */
-
- #ifndef TZDIR
- #define TZDIR "/etc/zoneinfo" /* Time zone object file directory */
- #endif /* !defined TZDIR */
-
- #ifndef TZDEFAULT
- #define TZDEFAULT "localtime"
- #endif /* !defined TZDEFAULT */
-
- #ifndef TZDEFRULES
- #define TZDEFRULES "posixrules"
- #endif /* !defined TZDEFRULES */
-
- /*
- ** Each file begins with. . .
- */
-
- struct tzhead {
- char tzh_reserved[20]; /* reserved for future use */
- char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
- char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
- char tzh_leapcnt[4]; /* coded number of leap seconds */
- char tzh_timecnt[4]; /* coded number of transition times */
- char tzh_typecnt[4]; /* coded number of local time types */
- char tzh_charcnt[4]; /* coded number of abbr. chars */
- };
-
- /*
- ** . . .followed by. . .
- **
- ** tzh_timecnt (char [4])s coded transition times a la time(2)
- ** tzh_timecnt (unsigned char)s types of local time starting at above
- ** tzh_typecnt repetitions of
- ** one (char [4]) coded GMT offset in seconds
- ** one (unsigned char) used to set tm_isdst
- ** one (unsigned char) that's an abbreviation list index
- ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
- ** tzh_leapcnt repetitions of
- ** one (char [4]) coded leap second transition times
- ** one (char [4]) total correction after above
- ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
- ** time is standard time, if FALSE,
- ** transition time is wall clock time
- ** if absent, transition times are
- ** assumed to be wall clock time
- ** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
- ** time is GMT, if FALSE,
- ** transition time is local time
- ** if absent, transition times are
- ** assumed to be local time
- */
-
- /*
- ** In the current implementation, "tzset()" refuses to deal with files that
- ** exceed any of the limits below.
- */
-
- #ifndef TZ_MAX_TIMES
- /*
- ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
- ** year's worth of solar time (corrected daily to the nearest second) or
- ** 138 years of Pacific Presidential Election time
- ** (where there are three time zone transitions every fourth year).
- */
- #define TZ_MAX_TIMES 370
- #endif /* !defined TZ_MAX_TIMES */
-
- #ifndef TZ_MAX_TYPES
- #ifndef NOSOLAR
- #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
- #endif /* !defined NOSOLAR */
- #ifdef NOSOLAR
- /*
- ** Must be at least 14 for Europe/Riga as of Jan 12 1995,
- ** as noted by Earl Chew <earl@hpato.aus.hp.com>.
- */
- #define TZ_MAX_TYPES 20 /* Maximum number of local time types */
- #endif /* !defined NOSOLAR */
- #endif /* !defined TZ_MAX_TYPES */
-
- #ifndef TZ_MAX_CHARS
- #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
- /* (limited by what unsigned chars can hold) */
- #endif /* !defined TZ_MAX_CHARS */
-
- #ifndef TZ_MAX_LEAPS
- #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
- #endif /* !defined TZ_MAX_LEAPS */
-
- #define SECSPERMIN 60
- #define MINSPERHOUR 60
- #define HOURSPERDAY 24
- #define DAYSPERWEEK 7
- #define DAYSPERNYEAR 365
- #define DAYSPERLYEAR 366
- #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
- #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
- #define MONSPERYEAR 12
-
- #define TM_SUNDAY 0
- #define TM_MONDAY 1
- #define TM_TUESDAY 2
- #define TM_WEDNESDAY 3
- #define TM_THURSDAY 4
- #define TM_FRIDAY 5
- #define TM_SATURDAY 6
-
- #define TM_JANUARY 0
- #define TM_FEBRUARY 1
- #define TM_MARCH 2
- #define TM_APRIL 3
- #define TM_MAY 4
- #define TM_JUNE 5
- #define TM_JULY 6
- #define TM_AUGUST 7
- #define TM_SEPTEMBER 8
- #define TM_OCTOBER 9
- #define TM_NOVEMBER 10
- #define TM_DECEMBER 11
-
- #define TM_YEAR_BASE 1900
-
- #define EPOCH_YEAR 1970
- #define EPOCH_WDAY TM_THURSDAY
-
- /*
- ** Accurate only for the past couple of centuries;
- ** that will probably do.
- */
-
- #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
-
- #ifndef USG
-
- /*
- ** Use of the underscored variants may cause problems if you move your code to
- ** certain System-V-based systems; for maximum portability, use the
- ** underscore-free variants. The underscored variants are provided for
- ** backward compatibility only; they may disappear from future versions of
- ** this file.
- */
-
- #define SECS_PER_MIN SECSPERMIN
- #define MINS_PER_HOUR MINSPERHOUR
- #define HOURS_PER_DAY HOURSPERDAY
- #define DAYS_PER_WEEK DAYSPERWEEK
- #define DAYS_PER_NYEAR DAYSPERNYEAR
- #define DAYS_PER_LYEAR DAYSPERLYEAR
- #define SECS_PER_HOUR SECSPERHOUR
- #define SECS_PER_DAY SECSPERDAY
- #define MONS_PER_YEAR MONSPERYEAR
-
- #endif /* !defined USG */
-
- #endif /* !defined TZFILE_H */
-