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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /timezone/tzfile.h
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
Diffstat (limited to 'timezone/tzfile.h')
-rw-r--r--timezone/tzfile.h62
1 files changed, 27 insertions, 35 deletions
diff --git a/timezone/tzfile.h b/timezone/tzfile.h
index 0921c3c339..3a9eee305a 100644
--- a/timezone/tzfile.h
+++ b/timezone/tzfile.h
@@ -4,7 +4,7 @@
/*
** This file is in the public domain, so clarified as of
-** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
+** 1996-06-05 by Arthur David Olson.
*/
/*
@@ -21,7 +21,7 @@
#ifndef lint
#ifndef NOID
-static char tzfilehid[] = "@(#)tzfile.h 7.14";
+static char tzfilehid[] = "@(#)tzfile.h 8.1";
#endif /* !defined NOID */
#endif /* !defined lint */
@@ -48,8 +48,9 @@ static char tzfilehid[] = "@(#)tzfile.h 7.14";
#define TZ_MAGIC "TZif"
struct tzhead {
- char tzh_magic[4]; /* TZ_MAGIC */
- char tzh_reserved[16]; /* reserved for future use */
+ char tzh_magic[4]; /* TZ_MAGIC */
+ char tzh_version[1]; /* '\0' or '2' as of 2005 */
+ 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 */
@@ -84,18 +85,22 @@ struct tzhead {
*/
/*
+** 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).
+*/
+
+/*
** 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
+#define TZ_MAX_TIMES 1200
#endif /* !defined TZ_MAX_TIMES */
#ifndef TZ_MAX_TYPES
@@ -105,7 +110,7 @@ struct tzhead {
#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>.
+** as noted by Earl Chew.
*/
#define TZ_MAX_TYPES 20 /* Maximum number of local time types */
#endif /* !defined NOSOLAR */
@@ -156,33 +161,20 @@ struct tzhead {
#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.
+** 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 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 */
+#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
#endif /* !defined TZFILE_H */