diff options
Diffstat (limited to 'timezone/tzfile.h')
| -rw-r--r-- | timezone/tzfile.h | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/timezone/tzfile.h b/timezone/tzfile.h index ee91104443..3155010ed1 100644 --- a/timezone/tzfile.h +++ b/timezone/tzfile.h @@ -21,16 +21,8 @@ ** Information about time zone files. */ -#ifndef TZDIR -#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */ -#endif /* !defined TZDIR */ - -#ifndef TZDEFAULT -#define TZDEFAULT "/etc/localtime" -#endif /* !defined TZDEFAULT */ - #ifndef TZDEFRULES -#define TZDEFRULES "posixrules" +# define TZDEFRULES "posixrules" #endif /* !defined TZDEFRULES */ @@ -44,7 +36,7 @@ struct tzhead { char tzh_magic[4]; /* TZ_MAGIC */ - char tzh_version[1]; /* '\0' or '2' or '3' as of 2013 */ + char tzh_version[1]; /* '\0' or '2'-'4' as of 2021 */ char tzh_reserved[15]; /* reserved; must be zero */ char tzh_ttisutcnt[4]; /* coded number of trans. time flags */ char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ @@ -86,11 +78,11 @@ struct tzhead { ** 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). +** (with nothing between the newlines if there is no POSIX.1-2017 +** 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 +** First, the 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 @@ -103,21 +95,25 @@ struct tzhead { */ #ifndef TZ_MAX_TIMES -#define TZ_MAX_TIMES 2000 +/* This must be at least 242 for Europe/London with 'zic -b fat'. */ +# 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 */ +/* This must be at least 18 for Europe/Vilnius with 'zic -b fat'. */ +# 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 */ +/* This must be at least 40 for America/Anchorage. */ +# 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 */ +/* This must be at least 27 for leap seconds from 1972 through mid-2023. + There's a plan to discontinue leap seconds by 2035. */ +# define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ #endif /* !defined TZ_MAX_LEAPS */ #endif /* !defined TZFILE_H */ |