#ifndef TZFILE_H

#define TZFILE_H

/*

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

** 1996-06-05 by Arthur David Olson.

*/

/*

** 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	"/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_version[1];		/* '\0' or '2' or '3' as of 2013 */

	char	tzh_reserved[15];	/* reserved; must be zero */

	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 UT 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 1, transition

**					time is standard time, if 0,

**					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 1, transition

**					time is UT, if 0,

**					transition time is local time

**					if absent, transition times are

**					assumed to be local time

*/

/*

** If tzh_version is '2' or greater, the above is followed by a second instance

** of tzhead and a second instance of the data in which each coded transition

** time uses 8 rather than 4 chars,

** then a POSIX-TZ-environment-variable-style string for use in handling

** instants after the last transition time stored in the file

** (with nothing between the newlines if there is no POSIX representation for

** such instants).

**

** If tz_version is '3' or greater, the above is extended as follows.

** First, the POSIX TZ string's hour offset may range from -167

** through 167 as compared to the POSIX-required 0 through 24.

** Second, its DST start time may be January 1 at 00:00 and its stop

** time December 31 at 24:00 plus the difference between DST and

** standard time, indicating DST all year.

*/

/*

** In the current implementation, "tzset()" refuses to deal with files that

** exceed any of the limits below.

*/

#ifndef TZ_MAX_TIMES

#define TZ_MAX_TIMES	2000

#endif /* !defined TZ_MAX_TIMES */

#ifndef TZ_MAX_TYPES

/* This must be at least 17 for Europe/Samara and Europe/Vilnius.  */

#define TZ_MAX_TYPES	256 /* Limited by what (unsigned char)'s can hold */

#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 */

#endif /* !defined TZFILE_H */