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Sync our copy of the timezone library with IANA release tzcode2017b.

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zic no longer mishandles some transitions in January 2038 when it
attempts to work around Qt bug 53071.  This fixes a bug affecting
Pacific/Tongatapu that was introduced in zic 2016e.  localtime.c
now contains a workaround, useful when loading a file generated by
a buggy zic.

There are assorted cosmetic changes as well, notably relocation
of a bunch of #defines.
This commit is contained in:
Tom Lane
2017-04-30 15:13:51 -04:00
parent 12d11432b4
commit e18b2c480d
7 changed files with 139 additions and 99 deletions
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11
src/timezone/strftime.c
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@@ -1,4 +1,4 @@
/* Convert a broken-down time stamp to a string. */
/* Convert a broken-down timestamp to a string. */
/*
* Copyright 1989 The Regents of the University of California.
@@ -43,7 +43,6 @@
#include <fcntl.h>
#include "private.h"
#include "tzfile.h"
struct lc_time_T
@@ -451,11 +450,17 @@ _fmt(const char *format, const struct pg_tm * t, char *pt, const char *ptlim,
{
long diff;
char const *sign;
bool negative;
if (t->tm_isdst < 0)
continue;
diff = t->tm_gmtoff;
if (diff < 0)
negative = diff < 0;
if (diff == 0)
{
negative = t->tm_zone[0] == '-';
}
if (negative)
{
sign = "-";
diff = -diff;