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921d749bd4
place of time_t, as per prior discussion. The behavior does not change on machines without a 64-bit-int type, but on machines with one, which is most, we are rid of the bizarre boundary behavior at the edges of the 32-bit-time_t range (1901 and 2038). The system will now treat times over the full supported timestamp range as being in your local time zone. It may seem a little bizarre to consider that times in 4000 BC are PST or EST, but this is surely at least as reasonable as propagating Gregorian calendar rules back that far. I did not modify the format of the zic timezone database files, which means that for the moment the system will not know about daylight-savings periods outside the range 1901-2038. Given the way the files are set up, it's not a simple decision like 'widen to 64 bits'; we have to actually think about the range of years that need to be supported. We should probably inquire what the plans of the upstream zic people are before making any decisions of our own.
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgtime.h
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* PostgreSQL internal timezone library
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/include/pgtime.h,v 1.2 2004/06/03 02:08:06 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PGTIME_H
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#define _PGTIME_H
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/*
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* The API of this library is generally similar to the corresponding
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* C library functions, except that we use pg_time_t which (we hope) is
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* 64 bits wide, and which is most definitely signed not unsigned.
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*/
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typedef int64 pg_time_t;
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struct pg_tm {
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon; /* origin 0, not 1 */
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int tm_year; /* relative to 1900 */
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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long int tm_gmtoff;
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const char *tm_zone;
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};
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extern struct pg_tm *pg_localtime(const pg_time_t *);
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extern struct pg_tm *pg_gmtime(const pg_time_t *);
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extern bool pg_tzset(const char *tzname);
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extern size_t pg_strftime(char *s, size_t max, const char *format,
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const struct pg_tm *tm);
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extern void pg_timezone_initialize(void);
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extern bool tz_acceptable(void);
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extern const char *select_default_timezone(void);
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extern const char *pg_get_current_timezone(void);
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#endif /* _PGTIME_H */
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