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Diffstat (limited to 'sql/tzfile.h')
| -rw-r--r-- | sql/tzfile.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/sql/tzfile.h b/sql/tzfile.h new file mode 100644 index 00000000..aa030864 --- /dev/null +++ b/sql/tzfile.h @@ -0,0 +1,142 @@ +#ifndef TZFILE_INCLUDED +#define TZFILE_INCLUDED + +/* Copyright (c) 2004, 2006, 2007 MySQL AB, 2009 Sun Microsystems, Inc. + Use is subject to license terms. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* + This file is based on public domain code from ftp://elsie.ncih.nist.gov/ + Initial source code is in the public domain, so clarified as of + 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov). +*/ + +/* + Information about time zone files. +*/ + +#ifndef TZDIR +#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */ +#endif /* !defined TZDIR */ + +/* + Each file begins with. . . +*/ + +#define TZ_MAGIC "TZif" + +struct tzhead { + uchar tzh_magic[4]; /* TZ_MAGIC */ + uchar tzh_reserved[16]; /* reserved for future use */ + uchar tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ + uchar tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ + uchar tzh_leapcnt[4]; /* coded number of leap seconds */ + uchar tzh_timecnt[4]; /* coded number of transition times */ + uchar tzh_typecnt[4]; /* coded number of local time types */ + uchar 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, we refuse 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 +#ifdef SOLAR +#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ +#else +/* + 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 SOLAR */ +#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 */ + +#ifndef TZ_MAX_REV_RANGES +#ifdef SOLAR +/* Solar (Asia/RiyadhXX) zones need significantly bigger TZ_MAX_REV_RANGES */ +#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES*2+TZ_MAX_LEAPS*2+2) +#else +#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES+TZ_MAX_LEAPS+2) +#endif +#endif + +#define SECS_PER_MIN 60 +#define MINS_PER_HOUR 60 +#define HOURS_PER_DAY 24 +#define DAYS_PER_WEEK 7 +#define DAYS_PER_NYEAR 365 +#define DAYS_PER_LYEAR 366 +#define SECS_PER_HOUR (SECS_PER_MIN * MINS_PER_HOUR) +#define SECS_PER_DAY ((long) SECS_PER_HOUR * HOURS_PER_DAY) +#define MONS_PER_YEAR 12 + +#define TM_YEAR_BASE 1900 + +#define EPOCH_YEAR 1970 + +/* + Accurate only for the past couple of centuries, + that will probably do. +*/ + +#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) + +#endif |