82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgtz.h
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* Timezone Library Integration Functions
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*
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* Note: this file contains only definitions that are private to the
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* timezone library. Public definitions are in pgtime.h.
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/timezone/pgtz.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PGTZ_H
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#define _PGTZ_H
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#include "pgtime.h"
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#include "tzfile.h"
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#define SMALLEST(a, b) (((a) < (b)) ? (a) : (b))
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#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))
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struct ttinfo
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{ /* time type information */
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int32 tt_utoff; /* UT offset in seconds */
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bool tt_isdst; /* used to set tm_isdst */
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int tt_desigidx; /* abbreviation list index */
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bool tt_ttisstd; /* transition is std time */
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bool tt_ttisut; /* transition is UT */
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};
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struct lsinfo
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{ /* leap second information */
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pg_time_t ls_trans; /* transition time */
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int64 ls_corr; /* correction to apply */
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};
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struct state
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{
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int leapcnt;
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int timecnt;
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int typecnt;
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int charcnt;
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bool goback;
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bool goahead;
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pg_time_t ats[TZ_MAX_TIMES];
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unsigned char types[TZ_MAX_TIMES];
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struct ttinfo ttis[TZ_MAX_TYPES];
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char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, 4 /* sizeof gmt */ ),
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(2 * (TZ_STRLEN_MAX + 1)))];
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struct lsinfo lsis[TZ_MAX_LEAPS];
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/*
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* The time type to use for early times or if no transitions. It is always
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* zero for recent tzdb releases. It might be nonzero for data from tzdb
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* 2018e or earlier.
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*/
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int defaulttype;
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};
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struct pg_tz
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{
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/* TZname contains the canonically-cased name of the timezone */
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char TZname[TZ_STRLEN_MAX + 1];
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struct state state;
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};
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/* in pgtz.c */
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extern int pg_open_tzfile(const char *name, char *canonname);
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/* in localtime.c */
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extern int tzload(const char *name, char *canonname, struct state *sp,
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bool doextend);
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extern bool tzparse(const char *name, struct state *sp, bool lastditch);
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#endif /* _PGTZ_H */
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