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Diffstat (limited to 'src/backend/utils/adt/nabstime.c')
-rw-r--r--src/backend/utils/adt/nabstime.c193
1 files changed, 29 insertions, 164 deletions
diff --git a/src/backend/utils/adt/nabstime.c b/src/backend/utils/adt/nabstime.c
index e6fa5a21fc0..408b1ee14dd 100644
--- a/src/backend/utils/adt/nabstime.c
+++ b/src/backend/utils/adt/nabstime.c
@@ -1,4 +1,5 @@
/*-------------------------------------------------------------------------
+ *
* nabstime.c
* Utilities for the built-in type "AbsoluteTime".
* Functions for the built-in type "RelativeTime".
@@ -9,9 +10,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/nabstime.c,v 1.103 2003/02/20 05:24:55 tgl Exp $
- *
- * NOTES
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/nabstime.c,v 1.104 2003/02/22 05:57:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -23,10 +22,6 @@
#include <float.h>
#include <limits.h>
-#if !(defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE))
-#include <sys/timeb.h>
-#endif
-
#include "access/xact.h"
#include "miscadmin.h"
#include "utils/builtins.h"
@@ -88,78 +83,25 @@ static int istinterval(char *i_string,
/* GetCurrentAbsoluteTime()
- * Get the current system time. Set timezone parameters if not specified elsewhere.
- * Define HasCTZSet to allow clients to specify the default timezone.
+ * Get the current system time.
*
- * Returns the number of seconds since epoch (January 1 1970 GMT)
+ * Returns the number of seconds since epoch (January 1 1970 GMT).
*/
AbsoluteTime
GetCurrentAbsoluteTime(void)
{
time_t now;
-#if defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE)
- struct tm *tm;
-
now = time(NULL);
-#else
- struct timeb tb; /* the old V7-ism */
-
- ftime(&tb);
- now = tb.time;
-#endif
-
- if (!HasCTZSet)
- {
-#if defined(HAVE_TM_ZONE)
- tm = localtime(&now);
-
- CTimeZone = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
- CDayLight = (tm->tm_isdst > 0);
-
-#ifdef NOT_USED
-
- /*
- * XXX is there a better way to get local timezone string w/o
- * tzname? - tgl 97/03/18
- */
- strftime(CTZName, MAXTZLEN, "%Z", tm);
-#endif
-
- /*
- * XXX FreeBSD man pages indicate that this should work - thomas
- * 1998-12-12
- */
- StrNCpy(CTZName, tm->tm_zone, MAXTZLEN+1);
-
-#elif defined(HAVE_INT_TIMEZONE)
- tm = localtime(&now);
-
- CDayLight = tm->tm_isdst;
- CTimeZone = ((tm->tm_isdst > 0) ? (TIMEZONE_GLOBAL - 3600) : TIMEZONE_GLOBAL);
- StrNCpy(CTZName, tzname[tm->tm_isdst], MAXTZLEN+1);
-#else /* neither HAVE_TM_ZONE nor
- * HAVE_INT_TIMEZONE */
- CTimeZone = tb.timezone * 60;
- CDayLight = (tb.dstflag != 0);
-
- /*
- * XXX does this work to get the local timezone string in V7? -
- * tgl 97/03/18
- */
- strftime(CTZName, MAXTZLEN, "%Z", localtime(&now));
-#endif
- }
-
return (AbsoluteTime) now;
-} /* GetCurrentAbsoluteTime() */
+}
/* GetCurrentAbsoluteTimeUsec()
- * Get the current system time. Set timezone parameters if not specified elsewhere.
- * Define HasCTZSet to allow clients to specify the default timezone.
+ * Get the current system time.
*
- * Returns the number of seconds since epoch (January 1 1970 GMT)
+ * Returns the number of seconds since epoch (January 1 1970 GMT),
+ * and returns fractional seconds (as # of microseconds) into *usec.
*/
AbsoluteTime
GetCurrentAbsoluteTimeUsec(int *usec)
@@ -167,85 +109,28 @@ GetCurrentAbsoluteTimeUsec(int *usec)
time_t now;
struct timeval tp;
-#ifdef NOT_USED
- struct timezone tpz;
-#endif
-#if defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE)
- struct tm *tm;
-
-#else
- struct timeb tb; /* the old V7-ism */
-#endif
-
gettimeofday(&tp, NULL);
-
now = tp.tv_sec;
*usec = tp.tv_usec;
-
-#ifdef NOT_USED
-#if defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE)
- now = time(NULL);
-#else
- ftime(&tb);
- now = tb.time;
-#endif
-#endif
-
- if (!HasCTZSet)
- {
-#if defined(HAVE_TM_ZONE)
- tm = localtime(&now);
-
- CTimeZone = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
- CDayLight = (tm->tm_isdst > 0);
-
-#ifdef NOT_USED
-
- /*
- * XXX is there a better way to get local timezone string w/o
- * tzname? - tgl 97/03/18
- */
- strftime(CTZName, MAXTZLEN, "%Z", tm);
-#endif
-
- /*
- * XXX FreeBSD man pages indicate that this should work - thomas
- * 1998-12-12
- */
- StrNCpy(CTZName, tm->tm_zone, MAXTZLEN+1);
-
-#elif defined(HAVE_INT_TIMEZONE)
- tm = localtime(&now);
-
- CDayLight = tm->tm_isdst;
- CTimeZone = ((tm->tm_isdst > 0) ? (TIMEZONE_GLOBAL - 3600) : TIMEZONE_GLOBAL);
- StrNCpy(CTZName, tzname[tm->tm_isdst], MAXTZLEN+1);
-#else /* neither HAVE_TM_ZONE nor
- * HAVE_INT_TIMEZONE */
- CTimeZone = tb.timezone * 60;
- CDayLight = (tb.dstflag != 0);
-
- /*
- * XXX does this work to get the local timezone string in V7? -
- * tgl 97/03/18
- */
- strftime(CTZName, MAXTZLEN, "%Z", localtime(&now));
-#endif
- };
-
return (AbsoluteTime) now;
-} /* GetCurrentAbsoluteTimeUsec() */
+}
+/* GetCurrentDateTime()
+ * Get the transaction start time ("now()") broken down as a struct tm.
+ */
void
GetCurrentDateTime(struct tm * tm)
{
int tz;
abstime2tm(GetCurrentTransactionStartTime(), &tz, tm, NULL);
-} /* GetCurrentDateTime() */
-
+}
+/* GetCurrentTimeUsec()
+ * Get the transaction start time ("now()") broken down as a struct tm,
+ * plus fractional-second and timezone info.
+ */
void
GetCurrentTimeUsec(struct tm * tm, fsec_t *fsec, int *tzp)
{
@@ -253,7 +138,7 @@ GetCurrentTimeUsec(struct tm * tm, fsec_t *fsec, int *tzp)
int usec;
abstime2tm(GetCurrentTransactionStartTimeUsec(&usec), &tz, tm, NULL);
- /* Note: don't pass NULL tzp directly to abstime2tm */
+ /* Note: don't pass NULL tzp to abstime2tm; affects behavior */
if (tzp != NULL)
*tzp = tz;
#ifdef HAVE_INT64_TIMESTAMP
@@ -261,23 +146,15 @@ GetCurrentTimeUsec(struct tm * tm, fsec_t *fsec, int *tzp)
#else
*fsec = usec * 1.0e-6;
#endif
-} /* GetCurrentTimeUsec() */
+}
void
abstime2tm(AbsoluteTime _time, int *tzp, struct tm * tm, char **tzn)
{
time_t time = (time_t) _time;
-
-#if defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE)
struct tm *tx;
-#else
- struct timeb tb; /* the old V7-ism */
-
- ftime(&tb);
-#endif
-
/*
* If HasCTZSet is true then we have a brute force time zone
* specified. Go ahead and rotate to the local time zone since we will
@@ -286,7 +163,6 @@ abstime2tm(AbsoluteTime _time, int *tzp, struct tm * tm, char **tzn)
if (HasCTZSet && (tzp != NULL))
time -= CTimeZone;
-#if defined(HAVE_TM_ZONE) || defined(HAVE_INT_TIMEZONE)
if ((!HasCTZSet) && (tzp != NULL))
tx = localtime((time_t *) &time);
else
@@ -336,7 +212,8 @@ abstime2tm(AbsoluteTime _time, int *tzp, struct tm * tm, char **tzn)
*/
StrNCpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
if (strlen(tm->tm_zone) > MAXTZLEN)
- elog(WARNING, "Invalid timezone \'%s\'", tm->tm_zone);
+ elog(WARNING, "Invalid timezone \'%s\'",
+ tm->tm_zone);
}
}
}
@@ -369,13 +246,13 @@ abstime2tm(AbsoluteTime _time, int *tzp, struct tm * tm, char **tzn)
*/
StrNCpy(*tzn, tzname[tm->tm_isdst], MAXTZLEN + 1);
if (strlen(tzname[tm->tm_isdst]) > MAXTZLEN)
- elog(WARNING, "Invalid timezone \'%s\'", tzname[tm->tm_isdst]);
+ elog(WARNING, "Invalid timezone \'%s\'",
+ tzname[tm->tm_isdst]);
}
}
}
else
tm->tm_isdst = -1;
-#endif
#else /* not (HAVE_TM_ZONE || HAVE_INT_TIMEZONE) */
if (tzp != NULL)
{
@@ -391,26 +268,16 @@ abstime2tm(AbsoluteTime _time, int *tzp, struct tm * tm, char **tzn)
}
else
{
- *tzp = tb.timezone * 60;
-
- /*
- * XXX does this work to get the local timezone string in V7?
- * - tgl 97/03/18
- */
+ /* default to UTC */
+ *tzp = 0;
if (tzn != NULL)
- {
- strftime(*tzn, MAXTZLEN, "%Z", localtime(&now));
- tzn[MAXTZLEN] = '\0'; /* let's just be sure it's
- * null-terminated */
- }
+ *tzn = NULL;
}
}
else
tm->tm_isdst = -1;
#endif
-
- return;
-} /* abstime2tm() */
+}
/* tm2abstime()
@@ -451,7 +318,7 @@ tm2abstime(struct tm * tm, int tz)
return INVALID_ABSTIME;
return sec;
-} /* tm2abstime() */
+}
/* nabstimein()
@@ -888,9 +755,7 @@ reltime2tm(RelativeTime time, struct tm * tm)
TMODULO(time, tm->tm_hour, 3600);
TMODULO(time, tm->tm_min, 60);
TMODULO(time, tm->tm_sec, 1);
-
- return;
-} /* reltime2tm() */
+}
/*
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-23 22:49:44 +0000