diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/time/internal/cctz/src/tzfile.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/time/internal/cctz/src/tzfile.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/time/internal/cctz/src/tzfile.h b/third_party/abseil_cpp/absl/time/internal/cctz/src/tzfile.h new file mode 100644 index 0000000000..269fa36c53 --- /dev/null +++ b/third_party/abseil_cpp/absl/time/internal/cctz/src/tzfile.h @@ -0,0 +1,122 @@ +/* Layout and location of TZif files. */ + +#ifndef TZFILE_H + +#define TZFILE_H + +/* +** This file is in the public domain, so clarified as of +** 1996-06-05 by Arthur David Olson. +*/ + +/* +** This header is for use ONLY with the time conversion code. +** There is no guarantee that it will remain unchanged, +** or that it will remain at all. +** Do NOT copy it to any system include directory. +** Thank you! +*/ + +/* +** 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" +#endif /* !defined TZDEFRULES */ + +/* See Internet RFC 8536 for more details about the following format. */ + +/* +** Each file begins with. . . +*/ + +#define TZ_MAGIC "TZif" + +struct tzhead { + char tzh_magic[4]; /* TZ_MAGIC */ + char tzh_version[1]; /* '\0' or '2' or '3' as of 2013 */ + 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 */ + 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 UT 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 1, transition +** time is standard time, if 0, +** transition time is local (wall clock) +** time; if absent, transition times are +** assumed to be local time +** tzh_ttisutcnt (char)s indexed by type; if 1, transition +** time is UT, if 0, transition time is +** local time; if absent, transition +** times are assumed to be local time. +** When this is 1, the corresponding +** std/wall indicator must also be 1. +*/ + +/* +** 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). +** +** 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 +** 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 +** standard time, indicating DST all year. +*/ + +/* +** In the current implementation, "tzset()" refuses to deal with files that +** exceed any of the limits below. +*/ + +#ifndef TZ_MAX_TIMES +#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 */ +#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 */ + +#endif /* !defined TZFILE_H */ |