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Change comparisons of tm->tm_isdst from "nonzero" to "greater than zero".

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Not sure why some were this way, and others were already correct, but it
 seems to have been like this for several years.
This caused problems on a few damaged platforms like AIX and IRIX which do
 not support DST calculations for years before 1970.
Thanks to Andreas Zeugswetter <ZeugswetterA@wien.spardat.at> for finding
 the problem.
This commit is contained in:
Thomas G. Lockhart
2001-01-17 16:46:56 +00:00
parent 9a342d2035
commit 8e9840383c
4 changed files with 60 additions and 55 deletions
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14
src/backend/utils/adt/timestamp.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.41 2001/01/03 16:48:02 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.42 2001/01/17 16:46:56 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -341,9 +341,9 @@ timestamp2tm(Timestamp dt, int *tzp, struct tm * tm, double *fsec, char **tzn)
*tzn = (char *) tm->tm_zone;
# elif defined(HAVE_INT_TIMEZONE)
# ifdef __CYGWIN__
*tzp = (tm->tm_isdst ? (_timezone - 3600) : _timezone);
*tzp = ((tm->tm_isdst > 0) ? (_timezone - 3600) : _timezone);
# else
*tzp = (tm->tm_isdst ? (timezone - 3600) : timezone);
*tzp = ((tm->tm_isdst > 0) ? (timezone - 3600) : timezone);
# endif
if (tzn != NULL)
*tzn = tzname[(tm->tm_isdst > 0)];
@ -1086,9 +1086,9 @@ timestamp_pl_span(PG_FUNCTION_ARGS)
# elif defined(HAVE_INT_TIMEZONE)
# ifdef __CYGWIN__
tz = (tm->tm_isdst ? (_timezone - 3600) : _timezone);
tz = ((tm->tm_isdst > 0) ? (_timezone - 3600) : _timezone);
# else
tz = (tm->tm_isdst ? (timezone - 3600) : timezone);
tz = ((tm->tm_isdst > 0) ? (timezone - 3600) : timezone);
# endif
# endif
@ -1735,9 +1735,9 @@ timestamp_trunc(PG_FUNCTION_ARGS)
# elif defined(HAVE_INT_TIMEZONE)
# ifdef __CYGWIN__
tz = (tm->tm_isdst ? (_timezone - 3600) : _timezone);
tz = ((tm->tm_isdst > 0) ? (_timezone - 3600) : _timezone);
# else
tz = (tm->tm_isdst ? (timezone - 3600) : timezone);
tz = ((tm->tm_isdst > 0) ? (timezone - 3600) : timezone);
# endif
# endif