diff options
Diffstat (limited to 'tzfile.h')
| -rw-r--r-- | tzfile.h | 24 |
1 files changed, 9 insertions, 15 deletions
@@ -17,16 +17,8 @@ ** Thank you! */ -/* -** Information about time zone files. -*/ - -#ifndef TZDEFRULES -# define TZDEFRULES "posixrules" -#endif /* !defined TZDEFRULES */ - - -/* See Internet RFC 9636 for more details about the following format. */ +/* Information about time zone files. + See Internet RFC 9636 for more details about the following format. */ /* ** Each file begins with. . . @@ -97,23 +89,25 @@ struct tzhead { */ #ifndef TZ_MAX_TIMES -/* This must be at least 242 for Europe/London with 'zic -b fat'. */ +/* The following limit applies to localtime.c; zic has no such limit. + The limit must be at least 310 for Asia/Hebron with 'zic -b fat'. */ # define TZ_MAX_TIMES 2000 #endif /* !defined TZ_MAX_TIMES */ #ifndef TZ_MAX_TYPES /* 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 */ +# define TZ_MAX_TYPES 256 /* Limited to 256 by Internet RFC 9636. */ #endif /* !defined TZ_MAX_TYPES */ #ifndef TZ_MAX_CHARS /* 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) */ +# define TZ_MAX_CHARS 256 /* Maximum number of abbreviation characters */ + /* (limited to 256 by Internet RFC 9636) */ #endif /* !defined TZ_MAX_CHARS */ #ifndef TZ_MAX_LEAPS -/* This must be at least 27 for leap seconds from 1972 through mid-2023. +/* The following limit applies to localtime.c; zic has no such limit. + The limit 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 */ |