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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * from Arthur Olson's 6.1
+ */
+
+#ifndef _LIBSPL_SYS_TZFILE_H
+#define _LIBSPL_SYS_TZFILE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Information about time zone files.
+ */
+
+#define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */
+
+#define TZDEFAULT (getenv("TZ"))
+
+#define TZDEFRULES "posixrules"
+
+/*
+ * Each file begins with. . .
+ */
+
+struct tzhead {
+ char tzh_reserved[24]; /* reserved for future use */
+ 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
+ */
+
+/*
+ * In the current implementation, "tzset()" refuses to deal with files that
+ * exceed any of the limits below.
+ */
+
+/*
+ * 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
+
+#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
+
+#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
+
+#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
+
+#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)
+
+/*
+ * 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
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LIBSPL_SYS_TZFILE_H */