/*!

  @file    tzfile.h

  @brief   This file is from the tz distribution at ftp://elsie.nci.nih.gov/pub/

*/

#ifndef TZFILE_H

#define TZFILE_H

/*

** This file is in the public domain, so clarified as of

** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).

*/

/*

** 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!

*/

/*

** ID

*/

#ifndef lint

#ifndef NOID

static char	tzfilehid[] = "@(#)tzfile.h	7.14";

#endif /* !defined NOID */

#endif /* !defined lint */

/*

** Information about time zone files.

*/

#ifndef TZDIR

#define TZDIR	"/usr/local/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. . .

*/

#define	TZ_MAGIC	"TZif"

struct tzhead {

 	char	tzh_magic[4];		/* TZ_MAGIC */

	char	tzh_reserved[16];	/* 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 UTC 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 UTC, 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 */