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e1c86ab97c
This absorbs a leap-second-related bug fix in localtime.c, and
teaches zic to handle an expiration marker in the leapseconds file.
Neither are of any interest to us (for the foreseeable future
anyway), but we need to stay more or less in sync with upstream.
Also adjust some over-eager changes in the README from commit 957338418.
I have no intention of making changes that require C99 in this code,
until such time as all the live back branches require C99. Otherwise
back-patching will get too exciting.
For the same reason, absorb assorted whitespace and other cosmetic
changes from HEAD into the back branches; mostly this reflects use of
improved versions of pgindent.
All in all then, quite a boring update. But I figured I'd get it
done while I was looking at this code.
81 lines
2 KiB
C
81 lines
2 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) 1996-2017, 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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