HGKeeper

/*************************************************************************

* Private Header file for timezone module

* copied from Olson timezone code, licence unchanged

* by Martijn van Oosterhout <kleptog@svana.org> (C) April 2006

*************************************************************************/

#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!

** ID

** Information about time zone files.

#ifndef TZDIR

#define TZDIR "/usr/share/zoneinfo" /* Default 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.

#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

#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))

** Since everything in isleap is modulo 400 (or a factor of 400), we know that

** isleap(y) == isleap(y % 400)

** and so

** isleap(a + b) == isleap((a + b) % 400)

** or

** isleap(a + b) == isleap(a % 400 + b % 400)

** This is true even if % means modulo rather than Fortran remainder

** (which is allowed by C89 but not C99).

** We use this to avoid addition overflow problems.

#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)

#endif /* !defined TZFILE_H */

pidgin/purple-plugin-pack