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GTimeZone: Fix time zones in Windows

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Get time zone information from registry. Use GetTimeZoneInformation()
instead to get the local time zone if Dynamic DST is not available.

https://bugzilla.gnome.org/show_bug.cgi?id=683998
This commit is contained in:
Arnel A. Borja 2012-10-20 11:06:28 +08:00 committed by John Ralls
parent 206ba07bd9
commit 1ccd4d60fc
1 changed files with 49 additions and 3 deletions
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52
glib/gtimezone.c
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@ -1305,6 +1305,9 @@ rules_from_identifier (const gchar *identifier,
* something that would pass as a valid value for the
* <varname>TZ</varname> environment variable (including %NULL).
*
* In Windows, @identifier can also be the unlocalized name of a time
* zone for standard time, for example "Pacific Standard Time".
*
* Valid RFC3339 time offsets are <literal>"Z"</literal> (for UTC) or
* <literal>"±hh:mm"</literal>. ISO 8601 additionally specifies
* <literal>"±hhmm"</literal> and <literal>"±hh"</literal>. Offsets are
@ -1337,7 +1340,9 @@ rules_from_identifier (const gchar *identifier,
* <varname>TZ</varname> environment variable. This function itself is
* independent of the value of <varname>TZ</varname>, but if @identifier
* is %NULL then <filename>/etc/localtime</filename> will be consulted
* to discover the correct timezone.
* to discover the correct time zone on Unix and the registry will be
* consulted or GetTimeZoneInformation() will be used to get the local
* time zone on Windows.
*
* If intervals are not available, only time zone rules from
* <varname>TZ</varname> environment variable or other means, then they
@ -1352,7 +1357,10 @@ rules_from_identifier (const gchar *identifier,
* full list of valid time offsets. See <ulink
* url='http://www.gnu.org/s/libc/manual/html_node/TZ-Variable.html'>The
* GNU C Library manual</ulink> for an explanation of the possible
* values of the <varname>TZ</varname> environment variable.
* values of the <varname>TZ</varname> environment variable. See <ulink
* url='http://msdn.microsoft.com/en-us/library/ms912391%28v=winembedded.11%29.aspx'>
* Microsoft Time Zone Index Values</ulink> for the list of time zones
* on Windows.
*
* You should release the return value by calling g_time_zone_unref()
* when you are done with it.
@ -1412,7 +1420,45 @@ g_time_zone_new (const gchar *identifier)
init_zone_from_iana_info (tz, zoneinfo);
g_bytes_unref (zoneinfo);
}
#elif defined G_OS_WIN32
#elif defined (G_OS_WIN32)
if (rules_from_windows_time_zone (identifier,
&rules, &rules_num,
&std_name, &dlt_name))
{
init_zone_from_rules (tz, rules, rules_num);
g_free (rules);
g_free (std_name);
g_free (dlt_name);
}
}
if (tz->t_info == NULL)
{
if (identifier)
zone_for_constant_offset (tz, "UTC");
else
{
TIME_ZONE_INFORMATION tzi;
if (GetTimeZoneInformation (&tzi) != TIME_ZONE_ID_INVALID)
{
rules = g_new0 (TimeZoneRule, 2);
rule_from_windows_time_zone_info (&rules[0], tzi.Bias,
tzi.StandardBias, tzi.DaylightBias,
tzi.StandardDate, tzi.DaylightDate);
rules[0].std_name = NULL;
rules[0].dlt_name = NULL;
rules[0].start_year = MIN_TZYEAR;
rules[1].start_year = MAX_TZYEAR;
init_zone_from_rules (tz, rules, 2);
g_free (rules);
}
}
#endif
}