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Use the standard date/time encoder rather than strftime() for output.

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This allows use of the DateStyle session variable.
pull/50/head
Thomas G. Lockhart 29 years ago
parent 01264e84ba
commit 1f4f4534a0
1 changed files with 63 additions and 122 deletions
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  1. 185
      src/backend/utils/adt/nabstime.c

185
src/backend/utils/adt/nabstime.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/nabstime.c,v 1.26 1997/05/11 15:11:45 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/nabstime.c,v 1.27 1997/06/23 14:56:15 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -97,35 +97,67 @@ GetCurrentTime(struct tm *tm)
{
int tz;
abstime2tm( GetCurrentTransactionStartTime(), &tz, tm);
abstime2tm( GetCurrentTransactionStartTime(), &tz, tm, NULL);
return;
} /* GetCurrentTime() */
void
abstime2tm(AbsoluteTime time, int *tzp, struct tm *tm)
abstime2tm(AbsoluteTime time, int *tzp, struct tm *tm, char *tzn)
{
struct tm *tt;
#ifdef USE_POSIX_TIME
struct tm *tx;
#else /* ! USE_POSIX_TIME */
struct timeb tb; /* the old V7-ism */
#if FALSE
if (tzp != NULL) time -= *tzp;
tt = gmtime((time_t *) &time);
(void) ftime(&tb);
#endif
/* XXX HACK to get time behavior compatible with Postgres v6.0 - tgl 97/04/07 */
#ifdef USE_POSIX_TIME
if (tzp != NULL) {
tt = localtime((time_t *) &time);
tx = localtime((time_t *) &time);
} else {
tt = gmtime((time_t *) &time);
tx = gmtime((time_t *) &time);
};
#else
#endif
#ifdef DATEDEBUG
#ifdef HAVE_INT_TIMEZONE
printf( "datetime2tm- (localtime) %d.%02d.%02d %02d:%02d:%02d %s %s dst=%d\n",
tx->tm_year, tx->tm_mon, tx->tm_mday, tx->tm_hour, tx->tm_min, tx->tm_sec,
tzname[0], tzname[1], tx->tm_isdst);
#else
printf( "datetime2tm- (localtime) %d.%02d.%02d %02d:%02d:%02d %s dst=%d\n",
tx->tm_year, tx->tm_mon, tx->tm_mday, tx->tm_hour, tx->tm_min, tx->tm_sec,
tx->tm_zone, tx->tm_isdst);
#endif
#else
#endif
tm->tm_year = tt->tm_year+1900;
tm->tm_mon = tt->tm_mon+1;
tm->tm_mday = tt->tm_mday;
tm->tm_hour = tt->tm_hour;
tm->tm_min = tt->tm_min;
tm->tm_sec = tt->tm_sec;
tm->tm_isdst = tt->tm_isdst;
tm->tm_year = tx->tm_year+1900;
tm->tm_mon = tx->tm_mon+1;
tm->tm_mday = tx->tm_mday;
tm->tm_hour = tx->tm_hour;
tm->tm_min = tx->tm_min;
tm->tm_sec = tx->tm_sec;
tm->tm_isdst = tx->tm_isdst;
#ifdef USE_POSIX_TIME
#ifdef HAVE_INT_TIMEZONE
if (tzp != NULL) *tzp = (tm->tm_isdst? (timezone - 3600): timezone);
if (tzn != NULL) strcpy( tzn, tzname[tm->tm_isdst]);
#else /* !HAVE_INT_TIMEZONE */
if (tzp != NULL) *tzp = - tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
/* XXX FreeBSD man pages indicate that this should work - tgl 97/04/23 */
if (tzn != NULL) strcpy( tzn, tm->tm_zone);
#endif
#else /* ! USE_POSIX_TIME */
if (tzp != NULL) *tzp = tb.timezone * 60;
/* XXX does this work to get the local timezone string in V7? - tgl 97/03/18 */
if (tzn != NULL) strftime( tzn, MAXTZLEN, "%Z", localtime(&now));
#endif
return;
} /* abstime2tm() */
@ -163,15 +195,6 @@ tm2abstime( struct tm *tm, int tz)
(day == MIN_DAYNUM && sec > 0))
return(INVALID_ABSTIME);
#if FALSE
/* daylight correction */
if (tm->tm_isdst < 0) { /* unknown; find out */
tm->tm_isdst = (CDayLight > 0);
};
if (tm->tm_isdst > 0)
sec -= 60*60;
#endif
/* check for reserved values (e.g. "current" on edge of usual range */
if (!AbsoluteTimeIsReal(sec))
return(INVALID_ABSTIME);
@ -246,22 +269,18 @@ printf( "nabstimein- %d fields are type %d (DTK_DATE=%d)\n", nf, dtype, DTK_DATE
} /* nabstimein() */
/*
/* nabstimeout()
* Given an AbsoluteTime return the English text version of the date
*/
char *
nabstimeout(AbsoluteTime time)
{
/*
* Fri Jan 28 23:05:29 1994 PST
* 0 1 2
* 12345678901234567890123456789
*
* we allocate some extra -- timezones are usually 3 characters but
* this is not in the POSIX standard...
*/
char buf[40];
char* result;
int tz;
double fsec = 0;
struct tm tt, *tm = &tt;
char buf[MAXDATELEN+1];
char zone[MAXDATELEN+1], *tzn = zone;
switch (time) {
case EPOCH_ABSTIME: (void) strcpy(buf, EPOCH); break;
@ -270,96 +289,18 @@ nabstimeout(AbsoluteTime time)
case NOEND_ABSTIME: (void) strcpy(buf, LATE); break;
case NOSTART_ABSTIME: (void) strcpy(buf, EARLY); break;
default:
/* hack -- localtime happens to work for negative times */
(void) strftime(buf, sizeof(buf), "%a %b %d %H:%M:%S %Y %Z",
localtime((time_t *) &time));
abstime2tm( time, &tz, tm, tzn);
#if DATEDEBUG
#endif
EncodeDateTime(tm, fsec, &tz, &tzn, DateStyle, buf);
break;
}
result = (char*)palloc(strlen(buf) + 1);
strcpy(result, buf);
return result;
}
/* turn a (struct tm) and a few variables into a time_t, with range checking */
AbsoluteTime
dateconv(register struct tm *tm, int zone)
{
tm->tm_wday = tm->tm_yday = 0;
#if FALSE
if (tm->tm_year < 70) {
tm->tm_year += 2000;
} else if (tm->tm_year < 1000) {
tm->tm_year += 1900;
};
#endif
/* validate, before going out of range on some members */
if (tm->tm_year < 1901 || tm->tm_year > 2038
|| tm->tm_mon < 1 || tm->tm_mon > 12
|| tm->tm_mday < 1 || tm->tm_mday > 31
|| tm->tm_hour < 0 || tm->tm_hour >= 24
|| tm->tm_min < 0 || tm->tm_min > 59
|| tm->tm_sec < 0 || tm->tm_sec > 59)
return INVALID_ABSTIME;
/*
* zone should really be -zone, and tz should be set to tp->value, not
* -tp->value. Or the table could be fixed.
*/
tm->tm_sec += zone; /* mktime lets it be out of range */
/* convert to seconds */
return qmktime(tm);
}
/*
* near-ANSI qmktime suitable for use by dateconv; not necessarily as paranoid
* as ANSI requires, and it may not canonicalise the struct tm. Ignores tm_wday
* and tm_yday.
*/
time_t
qmktime(struct tm *tm)
{
time_t sec;
int day;
#if FALSE
/* If it was a 2 digit year */
if (tm->tm_year < 100)
tm->tm_year += 1900;
#endif
day = (date2j( tm->tm_year, tm->tm_mon, tm->tm_mday) - date2j( 1970, 1, 1));
/* check for time out of range */
if ((day < MIN_DAYNUM) || (day > MAX_DAYNUM))
return INVALID_ABSTIME;
/* convert to seconds */
sec = tm->tm_sec + (tm->tm_min +(day*24 + tm->tm_hour)*60)*60;
/* check for overflow */
if ((day == MAX_DAYNUM && sec < 0) ||
(day == MIN_DAYNUM && sec > 0))
return INVALID_ABSTIME;
/* check for reserved values (e.g. "current" on edge of usual range */
if (!AbsoluteTimeIsReal(sec))
return INVALID_ABSTIME;
/* daylight correction */
if (tm->tm_isdst < 0) { /* unknown; find out */
tm->tm_isdst = (CDayLight > 0);
};
if (tm->tm_isdst > 0)
sec -= 60*60;
result = PALLOC(strlen(buf) + 1);
strcpy(result, buf);
return sec;
} /* qmktime() */
return(result);
} /* nabstimeout() */
/*

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